CRUCIFER^. 277 



Flowers minute, greenish. Stamens often 2 only. Pods small, short, 

 didymous, 2-celled; cells indehiscent, subglobose, when ripe separating 

 from the persistent linear axis, strongly rugose, 1-seeded. 



1. C. DiDYMUs, Smith, Fl. Britt. ii. 691 (1800); Linn. Mant. 92 (1767), 

 under Lepidium; Pers. Syn. ii. 185 (1807), under Senebiera. Stems 

 diffuse, % — 1}{ ft. long; the heavy-scented somewhat aromatic herbage 

 more or less hirsute; leaves with small narrow segments: pod a line 

 broad or more, emarginate at base and at summit, strongly reticulate. — 

 Plentiful on bluffs overhanging the sea at Point Lobos; occasional at 

 Berkeley, etc. 



26. RAPHANUS, Pliny (Radish). Coarse annuals, with large some- 

 what fleshy lyrate lower leaves, and loose racemes of purple or yellowish 

 large flowers. Sepals erect, the two outer gibbous at base. Petals entix-e 

 or emarginate, unguiculate. Pod indehiscent, elongated, somewhat 

 moniliform or at least constricted between the seeds, long-beaked. 

 Cotyledons enfolding the radicle. 



1. E. SATivus, Linn. Sp. ii. 669 (1753). More or less hispid with 

 scattered stiff hairs : fl. 8 — 10 lines long : petals purplish, with veinlets 

 of darker color, rarely white or yellowish: pod thick, fleshy when young 

 spongy in maturity, 1 — 2% in. long, 2 — 5-seeded. — The common Radish; 

 long since become one of the prevalent and troublesome weeds in Cali- 

 fornian fields everywhere; flowering and fruiting throughout the year. 



27. CAKILE, Sernpius (Sea Rocket). Glabrous very succulent sea- 

 side annuals, with simple leaves and short racemes of smallish purple 

 flowers. Sepals suberect, the two outer gibbous at base. Petals entire, 

 unguiculate. Pod of 2 unequal joints, each 1-seeded, the upper and 

 larger joint deciduous from the other. Seeds in the upper cell erect; in 

 the lower pendulous; cotyledons usually accumbent. 



1. C. edeutula, Hook. Fl. i. 59 (1830); Bigel. Fl. Bost. 157 (1814), under 

 Bunias: C. Americana, Nutt. Gen. ii. 62 (1818); Gray, Gen. 111. i. 170. t. 

 74. A foot high or more, the stout stem and few ascending branches 

 somewhat flexuous: leaves obovate, sinuately toothed: lower joint of 

 silicle oblong, 3 — 4 lines long; upper twice as large, ovate, compressed 

 and emarginate at apex. — Common along sandy beaches about the Bay 

 of San Francisco at West Berkeley, Alameda, etc., also at Half Moon 

 Bay; doubtless not rare on the coast and probably indigenous; but from 

 the analogies of plant distribution in America where Old World genera 

 are concerned, we should have expected the other species, C. marilirna 

 of Europe, to recur on the Pacific coast, rather than that the Atlantic 

 American species should have found place here. 



28. TROPIDOCARPUM, Hooker. Annuals, with Ught green pubes- 



