108 



BRASSICACEAE 



Pedicels in fruit strictly reflexed. 



Seeds in one row; pods 4-7 cm. long. 



Petals 6-10 mm. long; stem-leaves usually ample. 



Racemes not secimd. 44. A. rhodantha. 



Racemes secund. 45. A. retrofracta. 



Petals about 5 mm. long; stem-leaves narrow, serrulate. 



46. A. lignipes. 

 Seeds in two rows; pod 1.5-3.5 cm. long. 47. A. caduca. 



Plant densely cespitose; basal leaves linear-oblanceolate; perennials. 



48. A. canescens. 

 Stem-leaves scarcely sagittate at the base. 



Plant 3 dm. liigh or more, sparingly stellate; flowers numerous. 49. A. exilis. 



Plant 1-2 dm. high, densely stellate below; flowers few. 50. A. pendulocarpa. 



41. PARRYA R. Br. 



42. PHOENOCAULIS Xutt. 



Pod linear-lanceolate, 3-5 mm. wide; seed-coat not cellular. 

 Pod lanceolate. 7-10 mm. wide; seed-coat cellular. 



1. P. platycarpa. 



1. P. cheiranthoides . 



2. P. Huddelliana. 



1. C. cor data. 



1. C. crassicaulis. 



2. C. glaber. 



3. C. procerus. 



4. C. pilosus. 



1. S. longirostris. 

 1. C. hastatus. 



43. CARTIERA Greene. 



44. CAULANTHUS S. Wats. Wild Cabb.\ge. 



Stem glabrous; upper leaves reduced. 

 Stem inflated. 



Calyx densely villous. 



Calyx as well as the whole plant glabrous. 

 Stem not inflated. 

 Stem hirsute, leafy. 



45. STREPTANTHELLA Rydb. 



46. CHLOROCRAMBE Rydb. 



47. SCHOENOCRAMBE Greene. 



Plant tall, 3-6 dm. liigh, glabrous. 

 Leaves all linear, entire. 



Plant decumbent, slender; pods ascending, more or less arcuate; style about 1 mm. 

 long. 1. 5. decumbens. 



Plant erect, stouter; pods erect or nearly so, straight; style obsolete. 0.5 mm. or 

 less long. 2. S. linifolia. 



Some of the leaves pinnatifld. 3. S. pinnata. 



Plant low, 1-2 dm. liigh, pubescent; leaves pinnatifld. 4. S. pygmaea. 



48. THELYPODIOPSIS Rydb. 



Stipe very short, less than 1 mm. long or almost none; petals white or tinged with purple. 

 Style 2 mm. or nearlj so. 



Pod 7-9 cm. long. 1. T. elegans. 



Pod about 4 cm. long. 2. T. Bakeri. 



Style less than 1 mm. long; pod 5-7 cm. long. 3. T. wyomingensis. 



Stipe 2-5 mm. long; petals and sepals yellow. 4. T. aurea 



49. HETEROTHRIX (B. L. Robins.) Rydb. l. H. micrantha. 



50. HESPERIDANTHUS (B. L. Robins.) Rydb. l. H. linearifolium. 



51. THELYPODIUM Endl. 



Upper leaf-blades auriculate at the base. 

 Pods 3-5 cm. long. 



Petals 6-9 mm. long, about twice as long as the sepals. 



Pods 2-3 cm. long; basal leaves oblanceolate or spatulate. 



Petals 5-6 mm. long; blades spatulate; pedicels nearly erect. 



1. r. Palmeri. 

 Petals 7-9 mm. long; blades obovate; pedicels spreading or ascending. 



2. T. sagittatinn. 

 Pods 1-2 cm. long; basal leaves oval. 3. T. ovalifolium. 



Petals 10-15 mm. long, about three times as long as the sepals. 



Pods 4-5 cm. long, 1 mm. wide. 4. T. macropetalum. 



Pods about 3 cm. long, nearly 2 mm. wide. 5. T. Nuttallii. 



Pods 5-10 cm. long, arcuate, spreading or ascending. 



Stem stout; lower leaves coarsely sinuate-dentate; petals obovate, more than 2 



mm. wide. 6. T. ambiguuni. 



Stem slender; lower leaves entire or slightly sinuate; petals narrowly spatulate, 

 barely 2 mm. broad. 7. T. eucosmum. 



Upper leaf-blades attenuate at the base; leaves mostly laciniate. 

 Petals narrowly linear-oblanceolate. 



