Purple Pitcher Plant Pictures and Name Introduction: A Strange Carnivorous Plant
Chinese name: Purple Pitcher Plant Alternative name: Purple Pitcher Plant Latin scientific name: Sarracenia purpurea Family and genus: Sarraceniaceae, Sarracenia Origin and distribution: United States and Canada The purple pitcher plant is a perennial herbaceous plant and the shortest variety among the carnivorous plants in the genus Sarracenia
Chinese name: Purple Pitcher Plant
Alternative name: Purple Pitcher Plant
Latin scientific name: Sarracenia purpurea
Family and genus: Sarraceniaceae, Sarracenia
Origin and distribution: United States and Canada
The purple pitcher plant is a perennial herbaceous plant and the shortest variety among the carnivorous plants in the genus Sarracenia. It has purple pitchers, and the pitchers are very small, only about 30 cm long. It grows flowers that lean to one side, with bright colors, and has many subspecies and varieties. Its form is similar to the cage of Nepenthes. It can secrete nectar and digestive fluid. Insects attracted by the nectar lose their footing and fall into the pitcher, and the digestive fluid inside the pitcher digests and absorbs the insects.
A plant that eats insects - Nepenthes
In nature, there are some strange carnivorous plants that obtain nutrients by catching insects and small vertebrates.The leaves of Nepenthes are very peculiar: the leaf blade is very broad, and the tip extends into a tendril. The front end of the tendril swells into a pitcher-shaped insect-trapping sac. Because its shape resembles the cages southerners use to transport pigs, it is named “Nepenthes.” These thumb-sized little “pitchers” come in red, green, and rose colors, and are even inlaid with purple spots. Their colors are extremely vivid. The little “pitcher” has a lid at its mouth, usually half-open, which can prevent rainwater from entering the “pitcher.” The little “pitcher” is not only as beautiful as a flower, but the “pitcher” mouth and “pitcher” lid are also covered with nectar glands (ｘｉàｎ), which can secrete fragrant and sweet nectar. On a sunny, calm day, small insects such as flies, bees, and ants come to the “pitcher” mouth to collect nectar. Unexpectedly, the surface beneath their feet is slippery, and with one misstep they slide into the “pitcher.” At this time, the lid at the “pitcher” mouth automatically closes. In this way, no matter how well the small insects can fly or jump, they cannot escape. Finally, the inner wall of the “pitcher” secretes acidic digestive fluid, digesting and absorbing the captured insects.
Nepenthes likes sunny, humid areas. If the soil where it grows is too dry, it will not grow “insect-trapping pitchers.”
Pitcher Plant Sarracenia Pitcher Plant Gallery: How to Grow Pitcher Plants / How to Propagate Pitcher Plants
Pitcher Plant ProfilePitcher Plant Sarracenia
Pitcher Plant Cultivation Methods and Precautions Introduction to Pitcher Plants
Pitcher plants (Sarracenia) belong to the genus Sarracenia in the family Sarraceniaceae. Plants in this genus are native to Western Europe, North America, Mexico, and other places. Because their tubular leaves can secrete digestive fluid, which mixes with stored rainwater and can cause insects trapped inside the tube to rot. In other words, they use leaves to capture and digest insects such as ants and wasps.
Pitcher PlantIt is a relatively large and elegant carnivorous plant. Its leaves are pitcher-shaped, upright or lying sideways, and most are brightly colored with gorgeous spots or netted patterns. Its form is similar to the cage of Nepenthes, and it can secrete nectar and digestive fluid. Insects attracted by the nectar lose their footing and fall into the pitcher, and the digestive fluid and bacteria inside the pitcher digest and absorb the insects!
Morphological Characteristics of Pitcher Plants
Perennial carnivorous herb. Stemless, leaves in a rosette, evergreen, rough, cylindrical, with inward-pointing hairs in the leaves so insects can enter but not leave. Flower scape upright, flower solitary, nodding, purple or green-purple, blooming from April to May. Height range: 15 cm to 100 cm. Plants in the genus Sarracenia like to grow in swamps and are perennial herbs. They have rhizomes. Leaves clustered at the base, tubular, shaped like a pitcher or trumpet, with a wing extending from the front side. This tubular leaf is the insect trap, and the lower inner part of the tube often has downward-pointing hairs to prevent insects that fall in from escaping. Flowers bisexual, relatively large, regular, solitary at the top of the stem or in racemes; perianth in 2 whorls, sepals 4-6, imbricate, persistent; petals 5, rarely absent, yellow, red, or purple, etc.; stamens numerous, free, pistil 1; ovary superior, ovules numerous; style 1, apex shortly 2-cleft. Capsule. Seeds small, with a small embryo and soft fleshy endosperm.
Morphological Characteristics of the Genus SarraceniaMorphological characteristics of the genus Sarracenia: perennial herb, rhizome creeping, with many fibrous roots; leaves basal, forming a rosette, pitcher-shaped, trumpet-shaped, or tubular. The pitcher-shaped leaf has an insect-trapping sac, and the opening of the sac wall is smooth and bears nectar glands that secrete sweet nectar to attract insects to come and fall into the sac. The sac wall is smooth and contains digestive fluid, which can secrete digestive enzymes to break down insects, and then absorb them through protein-decomposing enzymes released by glands made of thin-walled cells on the inner wall. In addition, in autumn and winter, pitcher plants grow sword-shaped leaves. These leaves have no insect-trapping sac and produce nutrients only through photosynthesis. The flowers of pitcher plants are bisexual, and the inflorescence emerges from the leaf base. It is a loose raceme composed of several large flowers. The flower center consists of 1 helmet-shaped stigma, a 3-5-loculed ovary, and 50-80 stamens. The flowers are yellow-green or dark red, with 5 sepals located below the petals. The fruit is a capsule containing many small seeds, which automatically split open and eject the seeds when mature.
Ecological Habits of Pitcher Plants
Likes warmth and requires relatively high humidity. Suitable for growing in open areas with ventilation and direct sunlight.
Characteristics:Cold-resistant, suitable for beginners to grow
Biological Characteristics Ecological HabitsLikes warmth and requires relatively high humidity. Suitable for growing in semi-shaded, wind-sheltered environments.Growth CycleThe pitchers begin to grow at the end of the flowering period and continue until late autumn. In late autumn, the pitchers begin to wither, and the plant grows sword-shaped leaves (also called phyllodes) that do not have an insect-trapping function. Because insects decrease in winter and the weather turns colder, the plant's metabolism and other functions also slow down. At this time, spending energy on growing insect-trapping leaves is not cost-effective, so sword-shaped leaves are a more economical choice.Flowers and SeedsCross-section of a pitcher plant flower. The flowers of pitcher plants appear in early spring, slightly earlier than or at the same time as the first pitcher. They extend a long stalk, usually much taller than the leaves, to prevent pollinating insects from falling into the pitchers. Depending on the species, the flowers are about 3-10 cm in diameter. They are not only eye-catching but also have intricate structures that can prevent self-pollination. The flower of a pitcher plant has five sepals, connected at the base with three bracts; some anthers; and an umbrella-like structure with five points, from which five red or yellow petals hang. The entire flower appears upside down, so this umbrella-like structure can hold pollen falling from the stamens. The stigma is located on the umbrella-like structure, near the five points. The main pollinators are bees. When bees want to collect nectar, because of the flower's structure, they must first pass one of the stigmas before entering the inverted umbrella-shaped cavity. Inside the cavity, they inevitably pick up a pile of pollen from the anthers or fallen pollen. When leaving, also because of the flower's structure, the bees must exit through one of the lid-like petals. This method can prevent bees from passing the stigma and causing self-pollination. Then the bee visits the next flower, and when passing the stigma, it deposits the pollen from the previous flower there. This process repeats continuously.Flowering ProcessMost pitcher plant flowers are fragrant. These fragrances vary but are usually strong, even pungent. Sarracenia flava in particular has a strong odor, smelling somewhat like cat urine. The flowering period of pitcher plants is about 2 weeks. At the end of flowering, the petals fall off, and if the ovary has been pollinated, it begins to swell. The seeds form five valves, and one valve produces far fewer seeds than the other valves. On average, 300-600 seeds are produced, depending on the species and the success of pollination. The seeds mature after about five months, at which point the seed pod turns brown and splits open, releasing the seeds. The seeds are about 1.5-2 mm long and have a rough, waxy, waterproof outer coat. This structure may be for dispersing seeds by water flow. Pitcher plant seeds need to go through a “wet-cold stratification” stage before they germinate. From seed to growing functional insect-trapping leaves is actually quite fast, but for about the first year, the leaf form will differ from mature leaves and be simpler in structure. From seed to maturity takes about 3-5 years.
Landscape Uses of Pitcher Plants
Can be used as decoration in gardens, and is even more suitable for cultivation in schools as biological science teaching material.
Distribution Area of Pitcher Plants
Native to southern Canada and the eastern coastal regions of the United States.
Cultivation Techniques of Pitcher Plants Growing RequirementsPlants in the genus Sarracenia grow in open swampy wetlands and like sufficient light and moist soil. They are not afraid of cold or low air humidity and are carnivorous plants that are easy to cultivate. They like warm, humid, and semi-shaded environments. They are not cold-tolerant and fear dryness and strong light. Pitcher plants prefer more acidic media. Peat soil, perlite, and vermiculite can be mixed in a ratio of 1.5:1:1, then used with charcoal crumbs and dried cow dung pieces as cultivation materials. When mixing, add water and stir evenly so the medium fully absorbs water. Soft, acidic sphagnum moss is also a good choice.Substrate:During the growing season, pitcher plants are more suitable for tray-watering cultivation, and a mixed substrate of 1 part peat plus 1 part perlite or coarse sand can be used. During dormancy, they need to be removed from the water tray and kept relatively dry to prevent root rot. Pure sphagnum moss, or a mixed substrate of 2 parts peat plus 1 part perlite or coarse sand, can also be used.Water: Use a water source with low mineral concentration. During the growing season, tray-watering cultivation is suitable to keep the substrate highly humid.Humidity: Pitcher plants do not have high air humidity requirements; keeping it above 30% is sufficient.Temperature: The suitable growing temperature is 20-30 degrees. Below 10 degrees they will go dormant, and they can survive at 0-38 degrees.Light: Pitcher plants are light-loving plants and can accept full sun, and light can make the plant's colors vivid, but in summer, to avoid high temperatures, appropriate shading can be used.Nutrients:During the growing season, use general compound fertilizer diluted 4,000 times and spray it on the leaf surface or pour it into the pitcher to 1/3 of its height, 1-2 times per month.
Although pitcher plants grow in rainforest environments, sufficient sunlight is beneficial to them. Most Nepenthes can accept 2 to 4 hours of direct sunlight, or more than 6 hours of bright indirect light. Under long-term shady conditions, leaf pitchers form slowly and small, and the colors on the pitcher surface are dull. In summer, high air humidity and ventilation are required. If the air is too dry, water can be appropriately sprinkled in the surrounding environment to regulate it, or a water tray can be placed under the plant and the surface of the potting soil covered with sphagnum moss. Water preferably should not contain lime. Watering should be timely, and the potting soil should normally be kept moist. The general principle of watering is that the soil is moist but not soggy. Watering can be done at night to avoid water droplets remaining on the leaves and causing leaf burn when exposed to sunlight. The insect-trapping leaves are sac-shaped, and the leaf pitchers have beautiful colors and patterns and vary in size. Small ones are about the size of a thumb, while large ones can hold 300-400 ml of water. Pitcher plants can grow well without special fertilizing, and excessive fertilizing can cause fertilizer burn, leaf burn, and even failure to form pitchers. During the growing period, use fully decomposed cow dung water as a top dressing, 1-2 times per month. However, note that if fertilizer is poured on sphagnum moss, the sphagnum moss easily grows algae.
Pitcher plants are tropical plants and are not cold-tolerant. During low-temperature periods in winter, attention should be paid to cold protection and warmth to ensure safe overwintering. The suitable growth temperature for pitcher plants is 25-30°C, from March to September it is 21-30°C, and from September to March of the following year it is 18-24°C. In winter, the temperature should not be lower than 16°C. Below 15°C the plant stops growing, and below 10°C the leaf edges suffer freeze damage. Repot every year in February when new roots have not yet grown. Seedlings generally need 3-4 years of cultivation before they produce leaf pitchers. Leaf spot disease and scale insect damage are common. For leaf spot disease, spray with 50% zineb wettable powder at 1,000 times dilution. For scale insects, spray with 40% dimethoate emulsifiable concentrate at 2,000 times dilution.
Daily Care Water and Fertilizer ManagementWater and fertilizer management: Pitcher plants prefer cultivation media with good water retention and acidity. Soil with excessive nutrients can cause necrosis of the pitcher plant's roots. Sphagnum moss can be used directly for cultivation, and sphagnum moss is more suitable as a cultivation medium for leaf cuttings or small seedlings. Larger pitcher plants are more suitable for lower-cost peat soil, and a small amount of perlite or granular soil can be added to the peat soil to prevent water accumulation. In their native habitat, pitcher plants grow on sandy soil, so a cultivation medium made by mixing sand and peat soil can also be used. The substrate should be replaced once every spring. During the vigorous growth period, fertilize once every 3-4 weeks. The root systems of carnivorous plants are extremely intolerant of salt, so less fertilizer water is used during growth. After small seedlings have been planted for two months and the root system has grown stably, begin using fertilizer, applying 8,000-10,000 times diluted fertilizer water once per month.Temperature ManagementTemperature management: The temperature required by pitcher plants in summer should be 21-35°C. Plants in the genus Sarracenia all have the ability to tolerate light frost and are plants that need winter dormancy. In their native habitat, their dormant period can last up to 5 months. Therefore, during artificial cultivation, they should be allowed to go dormant in winter. At this time, watering can be reduced, and they should be placed in a low-temperature environment (a low temperature of 5°C). After dormancy, when spring warmth arrives, their inflorescences and leaves will grow at the same time, and in about 1 month they can grow into a potted plant with both beautiful flowers and leaves.Humidity ManagementHumidity management: Pitcher plants are wetland carnivorous plants and can grow immersed in swamps year-round in the wild, so they need an extremely humid environment for vigorous growth. During artificial cultivation, the seedling stage requires relatively high humidity, needing 90-100%, so purple pitcher plant care at the seedling stage requires covering it with a transparent, ventilated cover to retain moisture; larger plants have lower humidity requirements. If they are not placed in a place with good ventilation but not strong wind, they can grow normally. The humidity provided by water vapor evaporating from the surface of the cultivation medium is already sufficient, unless you live in a drier area, or grow the purple pitcher plant in an air-conditioned room for a long time, in which case it is necessary to increase humidity. At this time, the purple pitcher plant can be placed in an open aquarium or plastic trough to maintain the air humidity around it.Light ManagementLight management: Pitcher plants need sufficient light for their pitchers to be brightly colored. Under sufficient sunlight, keeping the underground soil cool is very beneficial to their growth. But during dormancy, light can be reduced to a minimum, or they can go dormant in a completely dark environment. During artificial cultivation, there should be 6-8 hours of sunlight exposure per day.
Propagation Methods of Pitcher Plants Division: Pitcher plants will grow side shoots. When they grow large enough, separate them from the mother plant and cultivate them separately.Cuttings: Propagation can be done using leaf cuttings or rhizome segment cuttings. You can cut a leaf in half, peel it from the mother plant, and insert it diagonally into a clean substrate, or cut the rhizome into 2.5 cm segments, apply fungicide to the cut surfaces, place them flat on a clean substrate, then cover with wet sphagnum moss, maintain high humidity and bright light, and in about 2 months shoots can grow.Sowing: Pitcher plant seeds have a relatively long storage life, up to 3-5 years, but germination also takes a long time, requiring 2-4 months. Before sowing, they need cold refrigeration (about 5 degrees) for 1-2 months, and the seeds must be kept moist. They can be wrapped in a wet paper napkin or placed in wet sphagnum moss. To avoid mold, the sphagnum moss and seeds should preferably be sterilized, and checked regularly (they can also be sown directly without refrigeration in winter or during low temperatures in spring); after refrigeration, the suitable sowing temperature is 15-30 degrees. Sow the seeds directly on the surface of a clean substrate. Do not cover the surface with soil, or cover with 1-3 mm of fine peat or fine-grained akadama soil to help fix the root system. Maintain high humidity and bright light, and they will germinate in about 1 month (in rare cases they may germinate after several months or even a year). It takes 3-5 years of growing to reach mature plant size.
Pest and Disease Control of Pitcher Plants
The pests and diseases harming pitcher plants are mainly caused by poor cultivation conditions, such as poor ventilation, excessive shade, too cold or too hot conditions, and air pollution. Common pests include red spider mites and aphids. Once discovered, spray with omethoate or dicofol at 1,000 times dilution. Diseases are mainly root rot caused by rotting sphagnum moss. At this time, repot promptly, remove old medium, cut off rotten roots, and replant with new medium. In addition, poor ventilation and excessive shade can easily lead to black spot disease. At this time, change the environment, cut off diseased leaves, and then spray with chlorothalonil or lime sulfur mixture for control. Therefore, it is very popular and widely cultivated as a household ornamental plant, a living teaching material for school biology classes, and a rare flower. As a commercial potted flower, it is sold in large quantities in flower markets.
The Carnivorous Mechanism of Pitcher PlantsPredation MethodThe insect-catching method of pitcher plants: The pitcher-shaped leaves of pitcher plants are effective insect traps. The sac-shaped pitcher leaves have bright colors, and their openings often secrete sweet nectar to lure insects to come and feed. Once the deceived insect climbs to the top and tries to cross the pitcher mouth to crawl into the inner wall, because the inner wall is very slippery, it falls into the pitcher and into the digestive fluid inside. Insects trying to crawl out of the pitcher are blocked by the inward-pointing bristles on the inner wall, and eventually, unable to struggle anymore, fall back into the digestive fluid and drown. The digestive fluid of pitcher plants contains protein-decomposing enzymes secreted by the glands on the pitcher wall, which can dissolve the proteins of the drowned insect bodies and turn them into nutrient amino acids that are absorbed by the pitcher wall.
Predation MethodCarnivorous plants that use traps as insect-catching devices usually attract insects with nectar. On the insect trap of pitcher plants, there are many nectar glands near the pitcher mouth that can secrete a juice containing fructose. However, this juice is not a delicacy, but a dangerous poisoned wine! In addition to fructose, these juices used to lure insects also contain a substance called coniine, used to harm insects. When insects consume this poison, they become confused, or paralyzed, or die. This is also why Nepenthes and pitcher plants can easily catch so many insects. However, Nepenthes seems somewhat more merciful; the toxicity of its nectar is lower, so most ants that come to feed can safely return to the nest, and only the most careless or deeply poisoned ants fall into the pitcher. By comparison, pitcher plants are much more dangerous. Their nectar is usually a fatal poison, and insects die from poisoning and fall into the pitcher.The Insect Trap of Pitcher PlantsThe pitcher-shaped leaves of pitcher plants are very effective insect traps. The exterior is brightly colored, and the smooth pitcher mouth can secrete nectar. On the side near the lid, many downward-pointing bristles extend across the entire inner side of the lid. Those bristles make insects mistakenly think they can climb, but in fact they easily fall. Inside the pitcher is digestive fluid secreted by the pitcher wall, but it is often diluted by rainwater. When greedy insects are attracted to feed on the nectar, they gradually approach the inner side of the pitcher mouth in order to eat more nectar. With one careless step, they fall into the digestive fluid in the pitcher. The inner wall of the pitcher is smooth and impossible to climb out of. After the insects drown, they are decomposed by the digestive fluid and bacteria in the pitcher, turned into nutrients, and then absorbed by the pitcher wall. Finally, the indigestible shells remain in the pitcher. Carnivorous mechanismAll pitcher plants do not have parts that can move to attract insects or other prey. Their traps are static, combining several lures (color, scent, nectar) and an inescapable environment. Next, examples of the functions they have evolved will be given to show you how, from entrance to trap, there is a way in but no way out. Most varieties combine scent, toxic nectar, waxy deposits (which hinder insects' feet), and gravity to make prey fall into the pitcher. In the nectar secreted by Sarracenia flava, coniine can be found, and coniine can paralyze insects. Once they fall into the pitcher, the pitcher wall is covered with smooth wax, leaving insects no place to stand. Further down, it is covered with inverted hairs, making it even harder for insects to leave. At the very bottom is a pool of liquid with digestive enzymes and wetting agents, which quickly drowns and digests the insects. The exoskeleton of insects is usually not digested, and over a summer, the pitcher body often becomes filled with insects. Sarracenia psittacina has a pitcher shape like a parrot's head and uses a structure like a lobster trap to let prey enter (in the rainy season, tadpoles and small fish may also swim in), and then they can never get out. It has sharp inward-growing hairs that force prey gradually into the bottom of the pitcher, where they are digested.
Variety Classification of Pitcher Plants
In addition to the well-known Nepenthes and Venus flytrap among carnivorous plants, a novel carnivorous plant - the pitcher plant - has become available in major flower markets in recent years, with each pot priced from several dozen yuan to one hundred yuan.
Pitcher plants (Sarracenia) belong to the genus Sarracenia in the family Sarraceniaceae. Plants in this genus are native to North America and other places, with a total of 8 species, but through the efforts of horticulturists, many hybrid species have been bred. Currently, the variety popular as a commodity in the market is mainly Sarracenia purpurea. Other ornamental species include Sarracenia leucophylla, Sarracenia flava, and Sarracenia minor.
Plants in the family Sarraceniaceae are all carnivorous plants. They grow pitcher-like organs derived from leaves from the rhizome, filled with digestive fluid. The pitcher mouth also has inverted hairs or a waxy smooth edge, so trapped insects cannot escape. In winter, the pitchers wither and the plant goes dormant. Among them, Sarracenia purpurea is the provincial flower of Newfoundland and Labrador, Canada.
Pitcher Plant Pictures