STREPTANTHUS. CRUCIFERiE. 47 



CAULANTHUS. 



-8 lines long, acute but not acuminate at length petaloid-dilated undulate 

 and whitish at the recurved tips : stamens in 3 unequal pairs, the upper 

 part much the longest: torus dilated: pods 2 inches long, falcate, on as- 

 cending pedicels strongly torulose; seeds wingless, though sometimes dis- 

 tinctly but very narrowly margined. On dry rocky ridges of the Siskiyou 

 Mountains to the Sierra Nevadas. 



S. glandulosus Hook Ic. t. 40 (?). Sparsely setose-pubescent below, 

 smooth above : stems erect from an annual root, 1-2 feet high, branching : 

 lowest leaves broadly oval or obovate, nearly sessile, dentate ; cauline 

 leaves ovate, clasping by a broad base, the uppermost lanceolate and 

 acuminate, entire or denticulate: flowers purple; sepals acuminate 2-3 

 lines long, somewhat pubescent or glabrate ; the purple petals a half 

 longer : one pair of filaments connate below : pods \y^-2% inches long, less 

 than a line wide, erect or ascending: seeds margined. Base of the Siski- 

 you Mountains near Waldo, Oregon. 



S. longirostris Watson Proc. Am. Acad, xxv, 127. Arabis longirostris 

 Watson Bot. King 17, t. 2, Brewer and Watson Bat. Cal. i, 31. Glabrous 

 and glaucous : stems erect 1-4 feet high from on annual root, branching 

 from the base, radical leaves ovate-spatulate, entire or sparingly toothed: 

 flowers spreading or reflexed purplish or white 2-3 lines long : sepals lin- 

 ear, not closed over the ovary 2 lines long, the lower pair saccate at base, 

 but little shorter than the narrow petals : pods 1-2 inches long by a line 

 broad, straight attenuate to a slender style, pendulous on short reflexed 

 pedicels : seeds elliptical, winged. In alkaline or sandy localities, Wallula, 

 Washington to Lower California and Utah. 



$. Howellii Watson Proc. Am. Acad, xx, 353. Glabrous and glau- 

 cous : the stout leafy simple stem 6-30 inches high from a perennial some- 

 what fleshy root : lower leaves obovate -spatulate, 1-6 inches long coarsely 

 repand-dentate ; the upper ones narrowly spatulate, entire not clasping: 

 racemes elongated : pedicels 3-10 lines long not spreading: sepals purple, 

 ovate, acute, 3 lines long more or less saccate ; the dark purple petals but 

 little longer : filaments all distinct : pods 2-3 inches long by l%-2 lines 

 broad, erect or spreading on stout pedicels: seeds oblong, winged. South- 

 ern Oregon near Waldo, and on Stein's mountain, southeastern Oregon. 



8 CAULANTHUS Watson Bot. King, 27. 



Stout perennial herbs with mostly pinnatifid leaves and dull- 

 colored flowers in long loose racemes. Sepals large, nearly equ- 

 ally saccate at base. Petals but little lunger than the sepals, 

 undulate-crisped, the blade only a somewhat dilated rhomboidal 

 extension of the broad claw. Anthers linear sagittate. Stigma 

 2-lobed or slightly emarginate. Pods sessile or with a short- and 

 thick stipe, terete, elongated ; valves eonvexed, more or less dis- 

 tinctly 1 -nerved. Seeds in one row oblong flattened emarginate 

 or scarcely margined. Cotyledons more or less incumbent. 



C. hastatus Watson Bot. King 28, t. 3. Glabrous, stems stout, 3-5 feet 

 high from a perennial root : simple or somewhat branched : leaves very va- 

 riable, radical ones lyrate or entire the terminal leaflet much the largest. 

 ovate, acute, hastate or truncate at base; cauline leaves ovate-oblong, en- 

 tire, hastate, rounded or cuneate at base : flowers greenish-yellow, in a 

 loose virgate raceme, reflexed, sepals narrow-lanceolate^ distinct : petals 

 equaling the sepals, sublaciniately toothed laterally : pods linear, subterete, 

 obtuse, spreading. On shaded slopes in the Blue' Mountains of Oregon to 

 the Wahsatch and Uintah Mountains of Utah. 



