MUSTARD FAMILY 365 



oled, with usually hastate blades. Sepals greenish, ascending. Petals greenish 

 white with short claws and lanceolate dentate blades. Anthers sagittate at the 

 base, hncar-oblong, at last curved, greenish. Pod slender, somewhat torulose, 

 short-stipitate and short-styled; stigma minute, entire. 



-1. C. hastatus (S. Wats.) Rydb. Perennial; stem glabrous, terete, &-10 

 dm. high, simple or branched above; leaves petioled; blades of all except the 

 uppermost leaves hastate, glabrous, thin, 5-12 cm. long; flowers drooping or 

 horizontal; petals 5-6 mm. long; pod terete, 6-9 cm. long; stipe and style about 

 ^ mm each. Caulanthus hastatus S. Wats. Canons and mountain valleys: 

 Ure.— Utah. Submont.-—Mont. Je-Jl. 



47. SCHOENOCRAMBE Greene. 



Glabrous perennials or slightly pubescent, \vith creeping rootstocks. Flow- 

 ers perfect m elongate racemes. Sepals slightly saccate at the base. Petals 

 light yellow, rather large. Pods sessile, linear-cylindrio. Stigmas nearly cir- 

 cular, but 2-lobed. Anthers sagittate at the base. Cotyledons incumbent. 



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

 Leaves all linear, entire. 



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



■pioi^i^^' 4. ^ J. , \. S. decumbens. 



j-iant erect, stouter; pods erect or nearly so, straight; style obsolete, 0.5 mm or 



PKntTw''*^! *^o^ }^'^\^ pmnatifld. 3.5. pinnata. 



i-iant low, 1-2 dm. lugh, pubescent; leaves pinnatifld. 4, 5. pygmaea. 



1. S, decumbens Rydb. Perennial; stems slender, decumbent, 2-3 dm. 

 long, as well as the whole plant perfectly glabrous, more or less branched; leaves 



n ^^' ^^' ^~^ ^^- ^'^^^J glaucous; petals yellow, 6-7 mm. long, spatulate or 

 obianceolate; pods 3-4 cm. long, about 0.75 nun. in diameter. Plains and hills: 

 Mont.-^Colo.-^Utah. Plain— S uhmont . Je-Au. 



2. S. linifolia (Nutfc.) Greene. Stems erect, glabrous, or with a few hairs 

 at tlie base; leaves glabrous, 4-7 cm. long; petals yellow, spatulate, 8 mm. long; 

 pod erect on ascending pedicels, 3-5 cm. long, 1 mm. thick. Sisymbrium lini- 

 JoliumNxitL Dry plains: Mont.— N.M.— Utah— B.C. Son.—SuhmonL My- 



-'th II P^^^^^*^ Greene. Stems simple, 3-5 dm. high; lower leaves pinnatifld, 

 ^'ith oblong to linear divisions, glabrous and glaucous, the upper linear and 

 entu-e; petals light yellow, 7-10 mm. long; pod 5-6 cm. long, 1 mm. thick, erect 



on ascending pedicels. Plains and hills: Mont.— Colo.— Utah— Wash. Son — 

 oubmont. My-Jl. 



4. S. pygmaea (Nutt.) Greene. Stem low, about 1 dm. high, sparingly 

 pubescent; leaves except the uppermost pinnatifld, with lanceolate or Unear 

 divisions; petals yellow, about 6 mm. long, spatulate. Dry soU: Mont. 



48. THELYPODIOPSIS Rydb. 



I -^^Gnnials, with rather thick and glaucous foliage and glabrous except the 

 ower part of the stem. Basal leaves spatulate or oblanceolate; stem-leaves 

 ^M7^^^'*^*'^-<^lasping with rounded auricles. Sepals thin, erect or ascending, not 

 giDbous. Petals more or less clawed, white or purplish or in one species yellow, 

 fathers long, linear, sagittate at the base, soon spirally curvxd. Pod slender, 

 th^^l i"^^^^ or less torulose, usually with a short stipe and style; stigma 2-lobed, 

 ^"^ lobes expanded over the septum; cotyledons obliquely incumbent. 



^fXf^^®^^''*'' ^^^ *^^ii 1 °"^- ^ong or almost none; petals white or tinged with purple. 

 Style 2 mm. or nearly so, 



^od 7-9 cm. long. 1. T. eleqans. 



Stvi I *"^'^t 4 cm. long. 2. T, Bakeri, 



Stinf. o - **^^'^ ^ ^^1- loxig; pod 5-7 cm. long. 3. T. wyomingensis . 



^^ ^-o mm. long; petals and sepals yellow. 4. T. aurea 



hTf^'\^A ®^®°^^^ (^^- E. Jones) Rydb. Stem 6-15 dm. high, erect, simple or 



lat 1 glabrous or slightly hairy below; basal leaves oblanceolate or spatu- 



^j dentate, 2-4 cm. long; stem-leaves ovate or lanceolate; petals 8-10 mm. long, 



