CATALOGUE. 19 



Washoe, Trinity, and Toyabe Mountains, Nevada, often growing with the 

 last ; 4,500-6,000 feet altitude ; April-July. (77.) 



Steeptanthus^ coedatus, Nutt. Glabrous; lower leaves spatulate-ovate 

 or oblong, repandly denticulate, (chiefly at the apex ;) cauline ones cordate, 

 clasping, .all obtuse; flowers on short pedicels; petals without a dilated 

 lamina, scarcely exceeding the sepals; siliques erect or spreading, com- 

 pressed, broadly linear ; seeds flat, margined. — A glaucous perennial, J-2° 

 high ; leaves thick, very obtuse or even truncate, with usually a few teeth at 

 the summit ; petals rarely half longer than the calyx, greenish yellow, or 

 often deep purple; pods 3-4' long, lJ-2" wide. Nuttall describes the 

 siliques as deflexed. They are most usually ascending, though specimens 

 show them in some measure reflected. It has been collected by Newberry 

 on the Lower Colorado ; by Parry, in the Middle Park ; and by Brewer, at 

 Carson's Pass, in the Sierras. Found in the East Humboldt Mountains, 

 Nevada, and not rare in the Uintas, on rocky ridges, at an elevation of 

 7-9,000 feet ; July-August. (78.) 



Caedamine coedifolia, Grray. PL Fendl, p. 8. Stem erect, simple, 

 from a fibrous creeping root, glabrous, or pilose at base, leafy ; leaves peti- 

 oled, cordate, sparingly repand-dentate or angular-toothed, ciliate, the lower 

 orbicular or reniform, the upper triangular-cordate, subacuminate ; flowers 

 rather large, white ; siliques suberect, 2-3 times longer than the spreading 

 pedicels. — Stem 1-3° high ; leaves 1-4' in diameter. Discovered by Fendler 

 in the Santa Fd Mountains, New Mexico, and collected since in Colorado, 

 and by Lyall on the northwestern boundary. Found in the Clover Mountains, 



I STEEPTAl^THUS, Nutt. Characters nearly as in Arabia; the calyx large, with broad and col- 

 ored sepals ; anthers elongated and sagittate, with the longer filaments sometimes adnate ; petals with 

 long channeled somewhat twisted claws, with or without a dilated lamina; silique compressed, with 

 1-nerved valves, and flattened seeds in one series ; stigma simple. 



The limits of this genus have not been in fact strictly drawn, several of the recognized species 

 deviating in a perplexing manner from the typical forms in their more or less terete pods and scarcely 

 flattened immarginate seeds. It is found, however, on investigation, that in all of these cases the cotyl- 

 edons are, to some greater or less extent, incumbent, showing that their true place is rather with Thely- 

 podium. If Streptanthus, therefore, be restricted to such species only as have compressed pods, the valves 

 sometimes slightly oarinate, but the seeds always flattened, circular or elliptical, more or less margined, 

 and with the cotyledons truly aocumbeut, the excluded species wiU be S. crassicmdis, Torr., 8. procerus, 

 Brewer, S. Coulteri, Gray, S. longifolius, Benth., S. sagittatus, Nutt., and S. flavescens, Torr. (not of Hook.) 

 Of these the three latter are received without difficulty into Thelypodium, to which lodanthus pinnatijidus 

 may also be united, having the base of the radicle decidedly oblique. The remainder, with two other 

 new species, form a group so well 'distinguished by their elongated terete pods, oblong seeds, and strep- 

 tanthoid flowers with elaniinate petals, that it seems advisable to form of them a new genus. (See 

 Cmlantlius, p. 27.) 



