MUSTARD FAMILY 



19 



Seeds solitary in each cell. 

 Pods regularly dehiscent. 



Pods with tomentose valves and cord-like margins, notched both at base and 



apex 23. Dithtraea, 



Pods with glabrous or pubescent valves, notched or obtuse at apex, not notched 



at base, winged or not winged at apex 26. Lephhtjm. 



Valves of the pods falling as closed or nearly closed nutlets, very rugose [ 



25. COEONOPUS. 



Pods more or less turgid. 

 Terrestrial plants. 



Pods subglobose or obovate; herbage pubescent „ 22. Lesquerella. 



Pods pear-shaped with a narrow margin; herbage glabrous or nearly so.. ..31. Camelina. 

 Aquatic plants ; pods oblong; leaves linear-subulate 27. Subularia. 



H. Pod indehiscent or at least not dehiscent by valves. 

 Pods elongated, at length breaking transversely into 1-seeded indehiscent joints. 



Flowers showy; pod several-seeded, commonly with constrictions between the seeds 



8. Eaphanits. 



Flowers small; pods 2-seeded, jointed in the middle 7. Caxile. 



Pods flattened, orbicular to obcuneate, 1-seeded, wholly indehiscent. 

 Pods margined all around with a wing ; stems mostly erect. 



Flowers in long racemes; pods orbicular 34. Thysanocakpus. 



Flowers crowded in rather short racemes, the racemes corymbose-paniculate ; pods ellip- 

 tical 6. ISATIS. 



Pods not winged; stems slender, diffuse 33. Athysauus. 



1. STANLEYA Nutt. 



Tall perennial or biennial herbs, or sometimes suffrnteseent, with coriaceous, 

 glabrous and often glaucous leaves. Flowers numerous in showy elongated spike- 

 like racemes. Calyx in bud long, eylindric; sepals linear or narrowly spatulate, 

 spreading or reflexed in anthesis. Stamens 

 equal; anthers basifixed, linear, curved or in 

 age tightly coiled; filaments long-exserted. 

 Stigma small, sessile on the summit of ob- 

 long-clavate thickened style, the thickened 

 portion with a longitudinal furrow. Pod 

 linear-elongated, terete, long-stipitate, its 

 valves 1-nerved; seeds in one row; cotyledons 

 incumbent. — Species 5, arid western North 

 America. (Lord Edward Stanley, English 

 ornithologist, first half 19th century.) 



Style short-hairy near base; petals much exceed- 

 ing sepals, bright lemon-yellow, the claw 

 woolly; leaves chiefly cauline, mostly pin- 



natifid, only the uppermost entire 



1. S. pinnata. 



Style wholly glabrous; petals about equaling sepals, 



light yellow, glabrous throughout; leaves 



chiefly basal, all entire or subentire 



2. S. elata. 



1. S. pinnata Britt. Desert Plume. 

 (Fig. 128. ) Plants 2 to 5 feet high, the long 

 solid erect branches from stout woody bases 

 4 to 6 inches high; herbage glabrous; leaves 

 glaucous, variable, blades of the lower com- 

 monly coarsely lyrate-pinnatifid or some- 

 times entire, 3 to 7 inches long, long-petioled, 

 blades of the upper less divided, or lanceo- 

 late and entire, short-petioled ; racemes % 

 long; sepals greenish-yellow; petals bright yellow, the oblong limb 2i/^ to 4 lines 



Fig. 128. Stanleya pinnata Britt. 

 basal leaf, X ^ ; &, infl., X % ; c, 

 X %. 



to 2 feet long; pedicels 2 to 4 lines 



