240 BRASSICACEAE 



1. STANLEYA Nutt. Gen. 2: 71. 1818. 



Mostly large, stout biennial or perennial herbs; similar in general appearance to 

 Cleome, glabrous and glaucous or sparsely pubescent with unbranched hairs. Leaves en- 

 tire and clasping, or petioled and entire, or variously pinnatifid. Inflorescence crowded, 

 racemose even in anthesis; pedicels mostly horizontal. Flower buds distinctly clavate. 

 Sepals erect, widely spreading or reflexed in anthesis. Petals yellow or yellowish, linear, 

 oblanceolate, or with a broad blade and narrow claw. Stamens subequal in length ; anthers 

 becoming tightly coiled or twisted at maturity. Pod stipitate, terete and often more or 

 less torulose, 3-8 cm. long; style short; stigma small, entire or nearly so. Seeds not 

 winged; cotyledons accumbent. [Name in honor of Lord Edward Stanley, one-time 

 President of the Linnaean Society, a noted English ornithologist] 



A genus of about 8 species, confined to the arid region of western United States. Type species, Stanleya 

 pinnata (Pursh) Britton. 



Middle stem leaves sessile, sagittate and auricled at the base; plants quite glabrous. 



Biennial; sepals erect in anthesis; stem leaves not decurrent on the stem. 1. S. confertiflora. 



Perennial; sepals reflexed in anthesis; stem leaves somewhat decurrent. 2. S.viridi flora. 

 Middle stem leaves petioled at the base; plants glabrous or hairy. 



Claws of the petals glabrous; filaments woolly at base; leaves usually entire. 3. 5. data. 



Claws of the petals as well as the filaments hairy; leaves usually pinnatifid. 4. S. pinnata. 



1. Stanleya confertiflora (Robinson) Howell. Biennial Prince's 



Plume. Fig. 1918. 



Stanleya viridiflora var. confertiflora Robinson in A. Gray, Syn. Fl. N. Araer. I 1 : 178. 1895. 



Stanleya confertiflora Howell, Fl. N.W. Amer. 1:59. 1897. 



Stanleya rara A. Nels. Bot. Gaz. 52: 262. 1911. 



Stanleya annua M. E. Jones, Contr. West. Bot. No. 17: 25. 1930. 



Biennial from a stout taproot, the stem usually solitary, stout, erect, unbranched, 3-9 dm. 

 high. Leaves narrowly sagittate, acute, 4-9 cm. long, erect or ascending; sepals light green or 

 yellowish, linear, erect or spreading in age; petals yellow, glabrous, linear, crisped, 2.5-3 cm. 

 long; stamens glabrous, distinctly tetradynamous ; anthers 1.5 mm. long; pods slender, scarcely 

 torulose, 4-6 cm. long; stipe slender, about 2 cm. long. 



Dry clay or alkaline soil in the juniper belt of the Upper Sonoran Zone; eastern and southeastern Oregon 

 to adjacent Idaho. Type locality: "Base of Stein's Mountain, Oregon." April-July. 



2. Stanleya viridiflora Nutt. Green Prince's Plume. Fig. 1919. 



Stanleya viridiflora Nutt. in Torr. & Gray, Fl. N. Amer. 1 : 98. 1838. 

 Stanleya collina M. E. Jones, Zoe 3: 284. 1893. 



Perennial from a stout taproot, the stems stout, erect, simple or sparingly branched, 2-8 dm. 

 high. Basal leaves tufted, narrowed to a winged petiole, entire or with a few salient lobes or 

 teeth near the base of the blade ; stern leaves sessile, more or less sagittate and amplexicaul at 

 the base ; inflorescence elongated ; pedicels horizontal, rather reflexed in anthesis ; petals about 

 2 cm. long, yellowish green ; pod torulose, arcuate-recurved, 5-7 cm. long ; stipe 10-20 mm. long. 



Dry hills, Upper Sonoran Zone; southeastern Oregon to southwestern Montana, Wyoming, northern 

 Utah, and northeastern Nevada. Type locality: "Bare shelving hills on Ham's Fork of the Colorado of the 

 West," southwestern Wyoming. March-Aug. 



3. Stanleya elata M. E. Jones. Tall Prince's Plume, Panamint Plume. Fig. 1920. 



Stanleya elata M. E. Jones, Zoe 2: 16. 1891. 



Biennial or short-lived perennial, the stem 6-18 dm. high, stout, simple or sparingly branched 

 upwards. Lower leaves very thick and leathery, entire or with a few small lobes near the base, 

 oval in outline, obtuse, petioled ; upper leaves reduced, narrow, acute ; pedicels horizontal, 10—12 

 mm. long; sepals golden yellow, conspicuous, 10-13 mm. long, spreading or reflexed in age; 

 petals light yellow, usually slightly shorter than the sepals, glabrous, linear-oblanceolate ; stamens 

 twice as long as the petals ; anthers loosely coiled at maturity ; filaments woolly toward the base ; 

 pod slender, 7-10 cm. long; stipe 12-16 mm. long. 



Dry plains and hills in the upper part of the Lower Sonoran Zone; Inyo County, California, to southern 

 Nevada and northwestern Arizona. Type locality: near Hawthorne, Nevada. March-Sept. 



4. Stanleya pinnata (Pursh) Britt. Golden Prince's Plume, Desert 



Plume. Fig. 1921. 



Cleome pinnata Pursh, Fl. Amer. Sept. 2: 739. 1816. 



Stanleya pinnatifida Nutt. Gen. 2: 71. 1818. 



Stanleya heterophylla Nutt. in Torr. & Gray, Fl. N. Amer. 1 : 97. 1838. 



Stanleya pinnata Britt. Trans. N.Y. Acad. 8: 62. 1889. 



Perennial from a stout, woody root, glaucous and glabrous, sparsely pilose or densely 

 puberulent, the stems erect, simple or sparingly branched, often flexuous, 4-16 dm. high. 

 Leaves exceedingly variable in outline and size (5-20 cm. long), usually more or less pinnate or 

 pinnatifid, often lyrate and sometimes entire, petioled, commonly narrower and more nearly 



