Lepidium. CRUCIFER.^. 125 



f. 5-7. — K Nevada, Holmes Creek Valley, 6,000 feet alt., Watson, an& near Halleck Station, 

 Wheeler ; fr. September. A species very distinct in its matted habit ; the flowers still unknown. 



* * Capsule orbicular, broadly elliptic or rarely ovate, abrupt or retuse at the apex. 

 H— Capsule wingless or inconspicuously winged at the apex, not exceeding 2 lines in breadth. 



++ Flowers bright yellow: style very slender and relatively long (half the length of 

 capsule). 

 L. flavum, Torr. A glabrous prostrate annual, branched from the base : leaves lanceolate 

 or obloug-lauceolate in outline, slightly fleshy; the radical rosulate, regularly piunatifld 

 with short rounded lobes and narrow acute sinuses ; the cauline less toothed : racemes short 

 and dense, subcapitate, somewhat corymbosely arrauged in robust individuals : capsule 

 glabrous, flnely reticulated, bifid at the apex ; teeth acute ; sinus open. — Pacif . R. Rep. iv. 

 67; Wats. Bot. King Exp. 30; Coville, Contrib. U. S. Nat. Herb. iv. 65. — California, 

 Mohave Creek, Fre'mont, Bigelow ; Mohave Desert, Parrij, Mrs. Bush ; Ash Meadows, 

 Vegas Valley, and Shepherd Canon, Coville & Funslon ; N. Nevada, Humboldt Valley, 

 Watson, Humboldt Wells, Greene; fl. March, April; fr. May. (Lower Calif., OrciUt.) 



++ -H- Flowers white or nearly so. 



L. alyssoides, Gray. Smooth : stems 1-several, erect, leafy, corymbosely branched 

 above : upper leaves entire, narrow, long-linear, acute, ascending ; the lower similar or 

 pinnately divided into a few usually rather narrow acutish entire or cleft segments : pedicels 

 about 3 lines long : sepals short, oval, usually caducous, much exceeded by the more per- 

 sistent long and slender-clawed petals : capsule rhombic-ovate. — PI. Fendl. 10, PI. Wright. 

 i. 10, & ii. 15; Wats. Bot. King Exp. 29. L. montanum, var. ahjssoides, Jones, Zoe, iv. 266. 

 — Plains and mountain valleys, W. Texas to Arizona, northward to Colorado, Porter, and 

 Trinity Mountains, Nevada, Wutson. 



L. montanum, Nctt. Probably biennial, low and branched from near the base or less 

 frequently witli a single erect stem branching above, minutely pulverulent to rather densely 

 hirsute : leaves even the upper ones more or less deeply toothed or pinuatifid (very rarely 

 entire) ; segments ovate to oblong-elliptic or very rarely linear : sepals not falling before the 

 petals: capsule ovate-elliptic to suborbicular. — Nutt. in Torr. & Gray, Fl. i. 116, 669 ; Gray, 

 PI. Wright, ii. 15; Torr. Pacif. R. Rep. vii. 8; Wats. Bot. King Exp. 29. L. corijmbosum, 

 Hook. & Arn. Bot. Beech. 323. L. Utahviense, Regel, Act. Hort. Petrop. i. 92. — In similar 

 places as the last, with which it may occasionally intergrade ; the majority of forms, of the 

 two, however, are too distinct to be united. The southern range is similar to th;it of the 

 last, but westward and northward the present species extends to California and N. Idaho, 

 Spalding. 



L. SCOpulorum, Jones, in herb. Perennial, becoming suffruticose at the base, irregularly 

 branched, quite glabrous : leaves subcoriaceous ; the lower ones obovate or oblanceolate in 

 outline, toothed or rather deeply parted into broad obtuse segments and narrowed at the 

 base into more or less elongated petioles; the upper leaves narrower, sessile, commonly 

 with a few spreading teeth near the apex : racemes usually numerous, rather dense ; pedicels 

 2-\ to 3 lines long : petals white, conspicuous, much exceeding the sepals ; blade suborbic- 

 ular ; claw slender : stamens 6 : capsule broadly ovate, somewhat narrowed to the slightly 

 retuse apex, glabrous, 1^ lines long; sides with low keels. — L. montanum, vat. alpiyium, 

 Wats. Bot. King Exp. 29. L. integrifoliiun, var. heterophi/Unm, Wats. Am. Nat. ix. 268. 

 L. heterophijllum, Jones, Zoe, iii. 284, not Benth. — Rocky cliffs of mountains, at moderate 

 altitudes, Utah, Wasatch Mountains, Watson, Jones, and near Cedar City, Parry. Certainly 

 a distinct species. 



Var. spatulatum, Robinson, n. var. More decidedly fruticose : leaves spatulate, 

 quite entire except at the subtruncate and obscurely 3-toothed apex : style very short. — 

 L. spatulatum, Yasej, in herb. — Headwaters of the Bear River, Colorado, Vasey, no. 51, 

 September, 1868. 



L. integrifolium, Nftt. Herbaceous, glabrous or puberuleut, probably biennial, branched 

 from the base, 7 to 15 inches high: root single, stout, commonly more than half inch in 

 diameter : leaves oblong, oblanceolate, or spatulate, acute or apiculate, thickish, 1 to 2 

 inches long, 24^ to 3^ lines broad, entire : racemes single, terminal or more commonly 

 several, 1 to 2 inches long : pedicels spreading, 3 to 4 lines long : petals obovate, white, 



