224 



CRUCIFERiE. 



2. C. procumbens (L.) Fries. Three to 6 in. high with as- 

 cending branches from the base; leaves oblanceolate or spatulate, or 

 the lower more or less pinnatifid; flower's minute, ^ line long or less; 

 sepals ovate-elliptic, thin-margined, about equaled by the white 

 petals; pods elliptic-oblong, entire at the apex, 1 to 1£ lines long, 

 pedicels filiform, in fruit 3 or 4 lines long and divaricately spreading. 

 — (C. elliptica C. A. Mey. C. divaricata Walp.) 



Alkaline soil from Alameda and Byron southward to Kern Co. 



15. CAM ELI N A Orantz. 



Erect annual with sagittate-clasping leaves. Flowers small, yellow, 

 in loose racemes. Pod obovate or pear-shaped, beaked with the 

 slender, persistent style; valves convex with the edges flattened, form- 

 ing a narrow margin around the pod; partition broad; seeds several 

 in each cell, oblong, marginless; cotyledons incumbent. (Greek 

 camai, dwarf, and linon, flax.) 



1. C. sativa Crantz. False Flax. Stem simple or branching- 

 above, 1^ to 2 ft. high, leafy, nearly glabrous; leaves oblong to lanceo- 

 late, entire or dentate; flowers rather small, light yellow; pedicels in 

 fruit ascending; pods 3J or 4 lines long, 2 to 2| lines broad. 



Old World weed of grain fields. Rare in California. 



16. ATHYSANUS Greene. 

 Low annual, leafy below, the short stem divided at or near the 

 base into few or many simple elongated filiform branches or racemes 

 which are unilaterally flower-bearing throughout. Flowers minute, 

 promptly reflexed or recurved. Petals linear or none. Stamens 6, 

 nearly or quite equal; filaments slender. Pod small, orbicular, in- 

 dehiscent, 1-celled, or 2-celled by a thin partition, wingless; cotyle- 

 dons accumbent. (Greek a-, without, and thusanos, fringe, the fruit 

 wingless, the species taken out of the genus Thysanocarpus, whose 

 fruit is broadly margined.) 



Pods plane, numerous on the racemes 1. A. pusillus. 



Pods twisted at maturity; raceme lax, the pods often distant 1 in. or more . 



2. A. unilateralis. 



1. A. pusillus (Hook.) Greene. Herbage pubescent with simple or 

 branching hairs; racemes 3 to 9 in. long; leaves broadly oblong with 

 about 3 coarse teeth on each side, 3 to 5 lines long, rarely varying 

 from 2 to 9 lines; ovary 1-celled; ovules 2 to 4, only one maturing, 

 that attached at base of the pod; fruiting pedicels recurved, 1 to 3 

 lines long; pods orbicular, strongly flattened f to 1 line long, hispid 

 all over with hooked hair-. 



Common everywhere on low hills and gravelly plains in the Coast 

 Ranges; also in the Sierra Foothills at Rough and Ready. 



2. A. unilateralis (Jones). Habit of the preceding; racemes lax, 

 diffuse, or horizontal and trailing, in age rigid and wiry, 6 to 18 in. 

 long; pods round-oval, 1 to 1£ lines broad, hispidulous, twisted when 

 mature, the pedicels thick, recurved, \ to 1 line long; seeds 6 to 10. — 

 (Heterodraba unilateralis Greene.) 



