118 CRUCIFERyE. Thysanocabpus*. 



* Sllicles winged, plano'Convex. 



1. T. curvipes (Hook.) : radical leaves pinnatifid or toothed ; cauline ones 

 lanceolate or linear ; silicles roundish-obovate, obscurely crenate, nearly gla- 

 brous ; margin broadly winged, entire or perforated with small holes ; petals 

 shorter than the calyx. — Hook. I. c. t. 18. J. A ; Fisch. ^ Meyer, ind. sem. 

 St. Petersb. Dec. 1835. p. 50. 



Great Falls of the Oregon, Douglas. April-May. — Stems solitary, mostly 

 branched, erect, 6-8 inches to a foot high, somewhat leafy. Leaves mostly 

 radical, spreading. Petals linear-oblong. Silicle about 2^ lines long. Hook. 



2. T. elegans (Fisch. & Meyer) : petals nearly twice as long as the calyx ; 

 silicles orbicular-obovate, membranaceously winged ; thawing (often) per- 

 forated with holes, emarginate at the apex. 



a. silicles glabrous ; style conspicuously exserted. — T. elegans, Fisch. ^ 

 Meyer, I. c. 



/?. silicles villous ; style slightly exserted. Hook..' ic.t. 39. T. Deppii, 

 Nutt. mss. T. n. sp. Fisch. ^ Mey. I. c. (without a name.) 



V. silicles somewhat pubescent, wing not perforated ; style not exserted. 



California, Douglas! Deppe. (ex Fisch. ^ Meyer.') — Stem 12-18 inches 

 high, branching, nearly glabrous. Leaves in /?. lanceolate, sagittate, repandly 

 toothed ; in y. linear, the upper ones almost subulate and sagittate-clasping. 

 Silicles 2i lines long; the winged margin p?rforated with a row of 12-14 

 oblong holes, or marked with thin diaphanous spots, the opaque coriaceous 

 substance of the centre extending between them, and thus giving the sihcle 

 a radiated appearance. 



3. T. pmlchellus (Fisch. & Meyer) : petals longer than the calyx ; silieles 

 glabrous, the wing not perforated, truncated at the apex ; style much exsert- 

 ed. Fisch. (^ Meyer. 1. c. 



California — Petals white, or someAvhat violaceous. Near T. curvipes. 

 Fisch. ^ Meyer. 



4. T. crenatus (Nutt. ! mss. ) : " petals about as long as the calyx ; silicles 

 orbicular-obovate, crenate, glabrous, slightly emarginate, membranaceously 

 winged ; the wing perforated ; style not exserted ; leaves linear -lanceolate, 

 runcinately and remotely denticulate. 



" St. Barbara, California, March-April. — Stem 12-14 inches high, branch- 

 ing above. Leaves an inch long ; the lower ones somewhat hirsute. Silicles 

 about half as large as in T. curvipes ; the wing more or less perforated." Nutt. 



5. T. laciniatus (Nutt.! mss.): "petals as long as the calyx; silicles 

 elliptical, glabrous, winged; the wing entire or crenate, not perforated, en- 

 tire at theapex, and acuminate with the conspicuous style ; leaves linear, re- 

 motely and incisely toothed. 



"With the preceding. — Decumbent, deep green and glabrous. Stem 

 about a foot long. Leaves U inch long, and scarcely a line wide ; teeth 

 long and subulate. Silicile about 2 lines long, acute at each end ; the wing 

 diaphanous." Nutt. 



* * Silicles slightly doubly convex, wingless. 



6. T. ohlongifolius (Nutt. ! mss.) : "petals about twice as long as the calyx ; 

 silicles nearly orbicular, wingless, hispid with uncinate hairs ; leaves oblong, 

 toothed, and (Avith the lower part of the stem) densely and stellately hirsute. 



"Rocky banks of the Oregon, near the junction of the Wahlamet. — 

 About a foot high, much branched, sometimes partly decumbent. Radical 

 leaves attenuate into a short petiole at the base ; cauline sessile. Petals cu- 

 neiform, rather conspicuous. Silicles about U line long, rather acute at the 

 base, very obtuse at the summit, and without a notch: style very short, but 

 distinct." Nutt. 



