116 CRUCIFERyE. Capsella. 



7. L. nitidum (Nutt. ! mss.) : " glabrous ; silicles elliptical-obovate, emar- 

 ginate, slightly winged, shining ; pedicels flattened, about the length of the 

 silicles ; leaves laciniate, the segments linear and very narrow ; flowers apet- 

 alous or dipetalous, diandrous." , 



With the preceding, Nutt all ! — Silicle about one-third larger than in L. 

 Virginicum: peduncles and pedicels a little pubescent. Cotyledons incum- 

 bent. 



8. L. oxycarpum : silicles broadly ovate, deeply emarginate, wingless, the 

 valves pungently acuminate and reticulated; stems branched, diffuse; leaves 

 linear-fiiifbrm, sparingly pinnatifid, toothed; flowers apetalous, diandrous. 



California, Douglas ! — Q) Stem 3-6 inches long, branching from the base, 

 minutely hairy. Leaves mostly radical, pectinately 3-5-toothed. Sepals al- 

 ternately subulate and broadly ovate. Ovary with the points uncinate-in- 

 flexed. Silicle about IJ line long, as long as the compressed pedicels : valves 

 carinate, glabrous, acutely and somewhat divaricately produced beyond the 

 septum. Style none. Cotyledons incumbent. 



9. L. latipes (Hook.) : caespitose, strigosely pubescent; flowers in dense 

 spiked racemes ; silicles elliptical-ovate, 2-winged at the summit, reticulated ; 

 pedicels very broad, flat ; leaves pinnatifid, with fiiiformly linear segments. — 

 Hook. ic. 1. t. 41. 



Monterey, California, Douglas'. — ^ Stems numerous, densely caespitose, 

 2-3 inches long, spreading. Racemes ovate or oblong, thick ; the flowers 

 much crowded. Leaves extending beyond the racemes ; segments 2-3-parted 

 or entire. Petals more than twice as long as the sepals, oblong, ciliate. Sili- 

 cles muricately hirsute, deeply bifid ; the lobes wing-lrke, straight and erect. 

 Stigma sessile. Cotyledons incumbent. 



10. L. integrifoliiim (Nutt.! mss.): " glabrous and decumbent; silicles 

 elliptical-ovate, wingless, scarcely emarginate ; septum prominent ; style short 

 but distinct ; leaves lanceolate-oblong, acute, narrowed below ; petals about 

 twice the length of the broad membranaceous sepals. 



" Prairies near the central chain of the Rocky Mountains, Lewis's River, 

 &c. June-July. — If Root rather large and deep. Stems several, decum- 

 bent, leafy, about a foot long, paniculately branched above. Flowers rather 

 conspicuous." Nuttall. — Silicles about 2 lines long, somewhat acute ; pedi- 

 cels 4-5 lines long, angular. Cotyledons incumbent. 



11. L. montanum (Nutt.! mss.): "nearly glabrous, decumbent; silicles 

 elliptical, slightly emarginate, wingless ; style conspicuous ; leaves pinnati- 

 fid and bipinnatifid ; segments oblong ; uppermost leaves trifid or entire. 



" Plains of the Rocky Mountains, on the western side, to the borders of the 

 Oregon. August. — li Root long, somewhat ligneous. Branches many from 

 one root, 8-12 inches long, spreading in a circular manner. Radical leaves 

 usually more or less bipinnatifid; segments short, acute. Flowers rather 

 conspicuous. Sepals oval-oblong. Petals nearly twice as long as the sepals." 

 Nuttall. — Silicles 2 lines long, indistinctly reticulated. Pedicels 3-4 lines in 

 length. Cotyledons incumbent. 



L. tuberosum, L.prcccox and L. diffiisum, DC. sijst. being founded on species describ- 

 ed by Rafinesque in the Forula Ludoviciana, are excluded : see p. 86. 



37. CAPSELLA. Vent. ; Lam. ill. t 557 ; DC. syst. 2. p. 383. 



Silicle triangular-cuneiform ; valves boat-shaped, wingless, coriaceous ; 

 cells small, many-seeded. — Herbaceous, annual. Radical leaves rosulate. 

 Flowers small, white, in long racemes. 



