Stanleya. CRUCIFERiE. * 97 



3. P. s a ^-it latum (J^ntt.l mss.) : leaves entire ; the cauliue ones lanceo- 

 late, sagittate, clasping ; stipe almost wanting; petals obovate, the limb as 

 long as the claw ; silique abruptly pointed, nearly erect ; raceme elongated 

 in fruit. 



" Plains on the west side of the Rocky Mountafns. — (5) About 2 feet 

 high, sparingly branched. Leaves somewhat glaucous, radical ones small 

 and spatulate. Flowers pale reddish-Avhite. Sepals broadly ovate. Petals 

 nearly twice as long as the calyx, strongly veined. Pedicels of the fruit 

 nearly half an inch long. Siliques an inch and a quarter in length, rather 

 broadly linear, somewhat incur\'ed." Nutt. — Seeds as broad as the cell ; the 

 radicle dorsal and almost medial. — This species is hardly a congener with 

 the preceding. It may belong to Sisymbrium § Cardaminopsis. 



17. STANLEYA. Nutt. gen. 2. p. 71 ; DC. syst. 2. p. 511. 



Silique nearly terete, slender, supported on a long stipe. "Seeds oblong, 

 somewhat terete. Cotyledons oblong-linear." DC. Calyx colored, spread- 

 ing. Petals erect, linear or spatulate ; claws exceeding the lamina in length, 

 and connivent into a tetrahedral tube. Stamens somewhat equal : anthers 

 linear. — Glabrous and glaucous perennial herbs. Leaves lyrately pinnatifid 

 or undivided. Flowers yellow, in long racemes. 



1. S. pinnatifida (Nutt.): leaves thickish. interruptedly lyrate-pinnatifid; 

 lobes somewhat lanceolate, entire or with 1-2 large teeth. — Nutt. ! gen. 2. 

 p. 71 ; DC. syst. 2. p. 512. Cleome pinnatifida, Fursh, fi. 2. p. 739. 



Rocks on the upper part of the Missouri, and near the head-waters of 

 Lewis's River, Nuttall ! May. — Stems 2-3 feet high, often several frorn 

 one root, decumbent at the base. Leaves large, sometimes with a very mi- 

 nute pubescence on the under side, deeply pinnatifid. Flowers in a crowded 

 raceme, very showy : pedicels about half an inch long, erect-spreading. 

 Calyx linear, pale orange-yellow. Petals sulphur-yellow, the claw lon^ and 

 very narrow, pubescent internally ; lamina linear-oblong, about hall the 

 length of the claw. Filaments very long and slender, pubescent below, with 

 a glandular enlargement at the base: anthers at length revolute. " Silique 

 an inch or more in length ; the slender stipe nearly an inch long." Nutt. 

 — We have not had an opportunity of examining the ripe siliques of this 

 very interestins plant ; neither were they found by Mr. Nuttall, either in this 

 or any of the following species, during his recent journey across the con- 

 tinent. 



2. 5f. integrifolia (James) : leaves thick, ovate-oblong, entire, attenuate at 

 each end ; stipe as long as the pedicel. — Tames ! in Long^s exped. 2. p. 17. 



Sandstone ridges at the base of the Rocky Mountains, Dr. James .'—Stem 

 simple. Leaves 5-6 inches long and 2-3 w'ide, prominently veined, undulate. 

 Sepals deep yellow, spatulate-oblong. Petals yellow, spatulate-obovate ; 

 claws very thick. Filaments recurved-spreading. Ovary flattened contrary 

 to the septum ; the edges of the septum prominent. Style none. 



3. ,S'. heterophylla (Nutt. ! mss.) : " stem erect, lower leaves lyrately pin- 

 nate, somewhat pubescent beneath ; terminal segment much larger, ovate- 

 lanceolate, somewhat serrate ; upper leaves lanceolate, entire ; lamina of the 

 petals longer than the claws. 



" Rocky situations near Lewis's River, in the Rocky Mountains. — A more 

 humble species than S. laciniata, which it resembles in the color of the flow- 

 ers. Under surface of the leaves pubescent with very short and somewhat 

 stellate hairs." — Nutt. 



13 



