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FOC | Family List | FOC Vol. 12 | Tiliaceae

3. Corchorus Linnaeus, Sp. Pl. 1: 529. 1753.

黄麻属 huang ma shu

Herbs or subshrubs. Leaves petiolate; stipules filiform; leaf blade papery, basal veins usually 3, usually with linear appendages at or near base, margin serrate, serrulate, or crenate. Flowers solitary or several arranged in cymes, axillary or extra-axillary, bisexual, yellow. Sepals 4 or 5. Petals 4 or 5; glands absent. Stamens 15 to many, on androgynophore, free; staminodes absent. Ovary 2-5-loculed; ovules many per locule; style short; stigma peltate or disk-shaped, entire or lobed. Fruit a capsule, cylindrical or globose, sometimes angled, 2-5-valved, loculicidally dehiscent. Seeds many.

Between 40 and 100 species: primarily in tropical regions; four species in China.

Corchorus oenotheroides H. Léveillé is the basionym of Indigofera oenotheroides (H. Léveillé) Lauener in the Fabaceae (see Fl. China 10). Corchorus polygonatum H. Léveillé is a synonym of Tricyrtis pilosa Wallich in the Liliaceae (see Fl. China 24: 152. 2000).

Several species have been grown as a fiber crop. Corchorus capsularis and C. olitorius are the source of the important fiber jute.

1 Capsule globose, apex truncate or slightly emarginate; leaf blade glabrous.   1 C. capsularis
+ Capsule cylindrical, apex angled or beaked; leaf blade hairy at least abaxially on veins   (2)
2 (1) Capsule apex 3-5-angled; leaf blade abaxially sparsely pilose, glabrescent.   2 C. aestuans
+ Capsule apex beaked; leaf blade abaxially sparsely hairy only on veins   (3)
3 (2) Ovary 5-loculed; leaf blade margin serrulate, petiole 0.8-3.5 cm.   3 C. olitorius
+ Ovary 3-loculed; leaf blade margin crenate, petiole 0.5-1 cm.   4 C. trilocularis

Lower Taxa


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