208 CRUCIFERAE (MUSTARD FAMILY) 



1. STANLEYA Nutt. 



Stout herbaceous perennials with entire or pinnatifid leaves, and rather 

 large flowers in greatly elongated spike-like racemes. Buds crowded, each 

 elongated-clavate. Calyx narrow, spreading, yellow. Petals with long con- 

 nivent claws, yellow. Anthers linear, curved or spirally coiled; filaments 

 elongated, spreading. Capsule subterete, long-stipitate. 



Leaves variously pinnatifid. 



Plant tomentose or white- villous . . . . . . . 1. S. tomentosa. 



Plant glabrous or pubescent, not tomentose. 



Flowers pale or cream-color .. . . . . . . . 2. S. albescens. 



Flowers bright yellow 



Leaves twice-pinnate or dissected 3. S. bipinnata. 



Leaves simply-pinnate or subentire . . . . . . 4. S. pinnata. 



Leaves entire or nearly so. 



Leaves mostly cauline, normal 5. S. integrifolia. 



Leaves mostly basal; stem leaves reduced 6. S. viridiflora. 



1. Stanleya tomentosa Parry, Am. Nat. 8: 212. 1874. White- villous or 

 hirsute throughout, stout, 8-15 dm. high: lower leaves lyrate-pinnatifid ; the 

 upper entire and hastate: raceme dense, thick, cylindrical, 3-5 dm. long: 

 flowers pale or cream-color: pedicel and stipe subequal. Dry gypsaceous soil; 

 Big Horn Basin, Wyoming. 



2. Stanleya albescens Jones, Zoe 2: 17. 1891. Erect and branching, 

 3-10 dm. high: leaves thick, pale and glaucous, lyrately pinnatifid or some 

 of the upper entire, more or less petioled, with hastately auricled base: sepals 

 greenish-white : petals cream-color, the blade broad, the narrow claw scarcely 

 woolly-pubescent : anthers tightly coiled : silique curved-ascending. Western 

 Colorado, Utah, and southward. 



3. Stanleya bipinnata Greene Erythea 3: 173. 1896. Closely allied to the 

 preceding but the stems several from the same crown, spreading-assurgent, 

 3-5 dm. high: leaves sometimes dissected, at least more or less twice-pinnate, 

 usually lightly pubescent above but often glabrous: inflorescence slightly 

 pubescent or glabrous: siliques very slender, torulose and tortuous; the stipe 

 about equaling the pedicel. (S. glauca Rydb. Bull. Torr. Bot. Club 31 : 409. 

 1904.) Dry banks and slopes; Wyoming, Colorado, Utah. 



4. Stanley apinnata (Pursh) Brit. Trans. N. Y. Acad. Sci. 8: 62. 1888. 

 Glabrous or nearly so, 4-10 dm. high: leaves mostly cauline, from nearly en- 

 tire to pinnately divided; the lower rather long-petioled ; the upper often 

 entire, short-petioled : petals 15-20 mm. long: stamens well exserted: siliques 

 somewhat torulose, twice as long as the stipes. (S. arcuata Rydb. Bull. Torr. 

 Bot. Club 29: 232. 1902.) Widely distributed; dry plains; Dakota to New 

 Mexico and California. 



5. Stanleya integrifolia James, Cat. 185. 1825. Closely allied to S. pin- 

 nata, stems less stout but the base indurated-shrubby, erect, 3-6 dm. high: 

 leaves entire, or the lower rarely few-toothed, mostly oblong, all short-petioled: 

 buds cylindric, the raceme relatively short: pedicel shorter than the stipe 

 which is somewhat surpassed by the slender curved spreading silique. Wyom- 

 ing and Colorado. 



6. Stanleya viridiflora Nutt. T. &-G, Fl. N. A. 1: 98. 1838. Glabrous, 

 4-12 dm. high: leaves crowded toward the base, mostly entire; the lower 

 cuneate-obovate, sometimes with a few teeth toward the base; becoming 

 smaller upward, clasping, lanceolate and passing into the bracts of the greatly 

 elongated spike-like raceme: sepals and petals greenish-yellow. From the 

 Mexican border to the upper Missouri, and west to California. 



2. SCHOENOCRAMBE Greene. PLAINS MUSTARD 



Perennial herbs from long horizontal rootstocks which give rise at intervals 

 to slender virgate simple or branched stems, with no root leaves, linear, en- 

 tire, or pinnate stem leaves, and racemose slender-pediceled rather large 

 yellow flowers. Buds cylindric-oblong. Sepals erect. Petals twice as long 



