What is the difference between Huangjulan (Michelia champaca) and bailanhua (Michelia alba)?

Appearance differences: Huangjulan is an evergreen tree, about 10 m tall, with a narrow umbrella-shaped crown. Bailanhua is somewhat taller than the former, reaching up to 17 m, with a broad umbrella-shaped crown. Flowers: Huangjulan's flowers are yellow, with 15-20 tepals in an oblanceolate shape. Bailanhua's flowers are white, with 10 tepals in a lanceolate shape.

I. Appearance differences

Huangjulan is an evergreen tree, about 10 m tall, with branches extending diagonally upward and a narrow umbrella-shaped crown; its young branches, buds, young leaves and petioles all bear pale yellow soft hairs. Bailanhua is taller than the former, reaching up to 17 m, with a broad umbrella-shaped crown; its young branches and buds also bear yellow-white soft hairs, which fall off when old.

II. Flower differences

Huangjulan's flowers are yellow, with 15-20 tepals in an oblanceolate shape, about 3-4 cm long and about 4-5 mm wide, blooming from June to July each year. Bailanhua's flowers are white, with 10 tepals in a lanceolate shape, similar in size to the former, and its flowering period is longer than the former, from April to September, with peak bloom in summer.