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FOC | Family List | FOC Vol. 8 | Brassicaceae

68. Chorispora R. Brown ex de Candolle, Mém. Mus. Hist. Nat. 7: 237. 1821.
[nom. cons.]

离子芥属 li zi jie shu

Chorispora tashkorganica

Credit: Photo: Al-Shehbaz

Chorispermum W. T. Aiton, nom. rej.

Herbs annual or perennial. Trichomes stalked, glandular, mixed with eglandular simple ones. Stems leafy or not. Basal leaves petiolate, rosulate or not, sinuate-dentate, pinnatifid, or pinnatisect, rarely entire. Cauline leaves absent or shortly petiolate, not auriculate, similar to basal ones. Racemes ebracteate, elongated in fruit, rarely flowers solitary on long pedicels from axils of rosette leaves. Sepals ovate, oblong, or linear, erect, base of lateral pair strongly saccate. Petals yellow or purple or lavender, much longer than sepals; blade broadly obovate, obcordate or rarely oblanceolate, apex emarginate or rarely obtuse; claws strongly differentiated from blade. Stamens 6, strongly tetradynamous; filaments not dilated at base; anthers narrowly oblong or linear, obtuse at apex. Nectar glands 2 or 4, lateral, intrastaminal or 1 on each side of lateral stamen; median glands absent. Ovules (5-)10-25(-30) per ovary. Fruit breaking into 1-seeded units, lomentaceous, linear, terete, sessile, slightly to strongly torulose or submoniliform; units indehiscent, with a thick corky or woody wall; replum flattened, persisting after segments fall off; septum becoming corky and splitting at middle; style 1.5-21 mm, beaklike; stigma conical, 2-lobed, lobes decurrent, strongly connivent. Seeds uniseriate, wingless, oblong; not mucilaginous when wetted; cotyledons accumbent.

Eleven species: primarily C and SW Asia; eight species (one endemic) in China.

1 Plants annual; flowering stems leafy.   (2)
+ Plants perennial with a caudex; flowering stems leafless or rarely 1-leaved, or flowers solitary.   (4)
2 (1) Flowers purple; fruit slightly torulose   3 C. tenella
+ Flowers yellow; fruit strongly torulose.   (3)
3 (2) Petals narrowly oblanceolate, 3-4 × 0.7-1 mm, rounded at apex; anthers 0.5-0.9 mm; style 2-4 mm in fruit; fruiting pedicels suberect or ascending, subappressed   2 C. tashkorganica
+ Petals broadly obovate, 6-20 × 3-7 mm, apex emarginate; anthers 1.5-2 mm; style 5-25 mm in fruit; fruiting pedicels divaricate or recurved   1 C. sibirica
4 (1) All flowers borne on solitary pedicels arising from basal rosette   4 C. bungeana
+ Flowers always in racemes.   (5)
5 (4) Flowers purple.   (6)
+ Flowers yellow.   (7)
6 (5) Sepals 3-4 mm; petals 6-10 mm; pedicel 0.3-1(-1.5) cm; fruiting style 1.5-3 mm   6 C. sabulosa
+ Sepals 6-7 mm; petals 15-18 mm; pedicel (1.7-)2-3.5(-5.5) cm; fruiting style 5-7 mm   5 C. greigii
7 (5) Leaves pinnatisect; petals 12-15 × 5-7 mm; sepals oblong, 5.5-7 mm   7 C. songarica
+ Leaves subentire, sinuate-dentate, or pinnatifid; petals 5-8(-10) × 2-4 mm; sepals ovate, 2-3(-3.5) mm   8 C. macropoda

Lower Taxa


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