CBUCIFEBJS. 227 



GENERA. 



I. CHEIKANTHE.E. 



a. Arabidine^e. — Cotyledons usually accumbent. 



1. Cheiranthus T. — Flowers hermaphrodite regular; receptacle 

 depressed-conical. Sepals 4, decussately imbricate ; lateral saccate 

 at base. Petals 4, cruciate, long-unguiculate, imbricate. Stamens 

 6, 4-dynamous ; filaments free ; 2 lateral shorter ; anthers introrse 

 2-rimose. Glands of disk hypogynous, usually 2, irregularly sur- 

 rounding base of lateral stamens. Germen free elongated ; style short ; 

 apex 2-lobed stigmatose; lobes spreading. Ovules go, descending 

 campylotropous ; funicles free. Siliqua elongated compressed, or 4- 

 gonous ; valves flat or connate, 1-ribbed ; septum membranous. Seeds 



oo, 1-seriate, campylotropous. Embryo rather fleshy (sometimes 

 coloured) ; cotyledons accumbent, more rarely incumbent oblique. — 

 Undershrubs or herbs, usually perennial, pubescent with appressed 

 2 -partite hairs, more rarely stellate-tomentose ; leaves alternate, 

 oblong or linear, entire or toothed ; flowers in terminal racemes 

 {Temperate Europe, North Africa and Canary Islands, West and 

 Central Mountainous Asia, Frigid North America). See p. 179, 



2. Atelanthera Hook f. & Thoms. 1 — Sepals small erect equal. 

 Petals linear-spathulate emarginate. Anthers 6, unguiculate at 

 apex, 1 -celled in 4 larger stamens. Siliqua linear subcom pressed ; 

 valves 1-ribbed; septum membranous; style short, at apex stigmati- 

 ferous 2-lobed. Seeds 1-seriate compressed, not marginate. — An 

 annual herb, low, very slender, hispid with small appressed 2 -partite 

 bristles ; stem thin ; leaves few linear entire ; flowers few, in a short 

 terminal raceme {West Thibet"). 



3. Nasturtium B,. Br. 3 — Sepals short patulous, at base equal or 



1 In Joum. Linn. Soc, v. 138. — B. H., Gen., 3 In Ait. Sort. Kew., ed. 2, iv. 109. — Spach, 

 68, n. 6. Suit, a Buffon, vi. 430.— DC, Prodr., i. 137 — 



2 Spec. 1. A. perpusilla Hook. f. & Thoms., Endl., Gen., n. 4850. — A. Geat, Gen. III., t. 53. 

 loc. cit. — B. H., Gen., 68, n. 7. — Leiolobium Keichb., 



Q 2 



