What Is the Black Tree Fern? Characteristics and Conservation of This Tree-Forming Fern

The black tree fern is a large tree-forming fern in the family Cyatheaceae (tree fern family), named for its leaf stalks and leaf rachises, which are often dark brown or purplish black. These plants have a very ancient origin, flourishing as early as the age of the dinosaurs, and are therefore often called living fossils; they hold important scientific research value and are now listed as a nationally protected wild plant.

In appearance, the black tree fern has an upright above-ground stem that looks like a small tree from a distance and can reach several meters in height. Its large fronds are deeply pinnately divided and cluster at the top of the stem, giving the whole plant a tall, spreading posture with a distinctly tropical rainforest feel. It favors a warm, humid climate and in nature mostly grows in shady, damp spots under valley forests and beside streams; it is strongly shade-tolerant and intolerant of direct strong light and dry air.

If cultivated in a greenhouse or a shaded, damp spot in a courtyard, it is best to use loose, fertile, well-drained, slightly acidic humus soil. In routine care, keep the potting soil moist and frequently mist the surroundings to raise air humidity, and choose a position with bright indirect light. In winter, take care to keep it warm and protect it from the cold to avoid low-temperature damage to the fronds.

It should be noted that wild black tree ferns are protected by law, so never dig up or buy and sell wild plants; for ornamental growing, choose artificially propagated seedlings from legitimate sources. During care, if symptoms such as scorched or curled leaf margins appear, they are mostly caused by air humidity being too low or light being too strong; timely shading and watering will gradually improve the condition.