BRASSICACEAE 



. 469 



Filaments more or less dilated below : foliage hispidly stellate. 

 Seeds margined : filaments strongly dilated at the base. 

 Capsules flattened, pubescent. 

 Capsules subglobose, glabrous. 



Filaments gradually dilated : style less than 2 mm. long at maturity. 

 Filaments abruptlydilated : style over 2 mm. long at maturity. 

 Seeds without margins :"filaments slightly dilated. 



Capsules pubescent : filaments dilated for % their length. 

 Capsules glabrous ; filaments dilated for ^fj tlieir length. 

 Pilamenis very slender or linear-subulate : foliage compactly canescent or scaly- 

 stellate. 

 Ovaries and capsules pubescent. 



Cavities of the ovary with 2 ovules : pods 2 mm. in diameter. 

 Cavities of the ovary with 4-6 ovules : pods 3-5 mm. in diameter. 

 Ovaries and capsules glabrous. 

 Capsules oblong or pear-shaped. 



Capsules oblong : pedicels ascending : style about as long as the capsule. 

 Capsules pyriform : pedicels spreading : style much shorter than the cap- 

 sule. 

 Capsules subglobose. 



Capsules pendent from recurved pedicels. 



Corollas white or pink : ovules 6 in a cavity : style one-half as long as the 



capsule. 

 Corollas yellow : ovules 2-4 in a cavity : style as long as the capsule. 

 Capsules erect, or nearly so, from ascending often curved pedicels. 

 Annuals. 



Stem-leaves with pinnatifid-dentate blades. 

 Stem-leaves entire or merely repand blades. 

 Ovules 4-8 in each cavity of the ovary. 

 Pods 2-3 mm. in diameter. 

 Pods stipitate. 

 Pods sessile. 

 Pods 4-5 mm. in diameter. 

 Ovules 2 in each cavity of the oVary. 

 Biennials or perennials. 

 Capsules 6 mm. long. 

 Capsules 4-5 mm. long. 



1. L. Lcscurii. 



2. L. grandiflora. 



3. L. auriculata. 



4. L. lasiocarpa. 



5. L. dcnsiflora. 



6. L. globosa. 



7. L. BerlandierL 



8. L. repanda. 



9. L. Nuttallii. 



10. L. pallida. 



11. L. rccurvata. 



12. L. Lindheimeri. 



13. L. gracilis. 



14. L. sessilis. 



15. L. poh/antha. 



16. L. angustifolia. 



17. L. Engelmannii. 



18. L. argyrea. 



1. Lesquerella Lescurii ( A. Gray) S. Wats. Annual, roughish with stellate hairs. 

 Stems branched at the base ; branches erect, ascending or decumbent, 1-3 dm. long, sim- 

 ple or branched : basal-leaves longer than the cauline : stem-leaves oblong-oval or oblong- 

 ovate, 1-4 cm. long, repand-dentate, sessile and clasping by the auricled bases : pedicels 

 ascending, 5-10 mm. long: sepals 2-2.5 mm. long: petals yellow, broadly spatulate, 4-6 

 mm. long : pods oval or ovoid, 4-5 mm. long, flattened, pubescent, the style about 5 as 

 long as the body. 



On hillsides, near Nashville, Tennessee. Early spring. 



2. Lesquerella grandiflora (Hook.) S. Wats. Annual, thinly pubescent or some- 

 what hispid. Stems branched at the base ; branches erect or ascending, 1-4 dm. long, 

 commonly simple : basal leaves oblanceolate, deeply sinuate or pinnatitid : stem-leaves 

 shorter than the basal ; blades oblanceolate, oblong or oblong-oblanceolate, 1-3.5 cm. 

 long, entire or sinuate, sessile and somewhat clasping : pedicels ascending or spreading, 

 1-1.5 cm. long : sepals oblong to oblong-lanceolate, 3-4 mm. long : petals obovate, twice 

 or thrice as long as the sepals : pods subglobose, 5 mm. in diameter, glabrous. 



On plains or prairies, Texas. Spring. 



3. Lesquerella auriculata (Engelm. & Gray) S. Wats. Annual, hirsute. Stems 

 simple and erect or usually branched at the base ; branches ascending or decumbent, 1-3 

 dm. long, commonly simple : basal leaves oblanceolate, repand, 2-5 cm. long : stem- 

 leaves with oblong or oblong-lanceolate blades, 1-3 dm. long, entire or repand, sessile, 

 clasping by the auricled bases: pedicels ascending, 1-1.5 cm. long: sepals oblong to ob- 

 long-lanceolate, 4-5 mm. long : petals yellow, narrowly obovate, about twice as long as the 

 sepals : pods subglobose, 5-6 mm. in diameter, glabrous, narrowed at the base, the style h 

 as long as the body. 



On dry prairies, Texas. Winter and spring. 



4. Lesquerella lasiocarpa (Hook. ) S. Wats. Annual, finely hispid. Stems branched 

 at the base ; branches ascending or spreading, 1-7 dm. long, simple or branched : basal 

 leaves oblanceolate in outline : blades pinnatifid, 3-8 cm. long, the segments entire or 

 toothed : stem-leaves oblong or oval, 1-3 cm. long, pinnatifid or coarsely toothed, sessile, not 

 auricled : pedicels spreading or slightly recurved, 1-1.5 cm. long : petals obovate, about 6 

 mm. long : filaments slightly dilated below the middle : pods spheroidal, 5-6.5 mm. long, 

 the style h as long. 



In.valleys, Texas and adjacent Mexico. Spring. 



5. Lesquerella densiflora (A. Gray) S. Wats, Annual, more or less densely canes- 

 cent. Stems branched at the base ; branches erect or ascending, 1-3 dm. long, often 



