VI. PLANTS VVKIGHTIAN-E. 15 



the Limpio and the Rio Grande; June. (1323.) — These arc younger specimens 

 than those gathered in 1849, and show the lower leaves, which are much like the 

 upper, only more sinuate-toothed and inclining to spatulate. The petals arc white, 

 and scarcely longer than the calyx. 



Lepidium alyssoides, Gray, PI. Fendl p. 10, S,' PI. Wriqht. p. 10. Valley of 

 Live Oak Creek, ^yestern Texas ; May. Also on stony hills at the copper mines, 

 New Mexico; Aug. (853.) Also on Rainwater Creek, June; a dwarf variety 

 (1324) ; and on the Rio Grande helow El Paso ; a large form with the lower 

 cauline leaves divided. (132.3.) 



L. MONTANUM, Niitt. ill ToiT. St Gray, Fl. \. p. IIG Sf 669. Valley of Copper- 

 mine Creek, New Mexico, in sandy soil ; Aug. ; and west of the Chiricahui Moun- 

 tains, Sonora; Sept. (854.) — This has orbicular-ovate (not elliptical) silicles, and 

 is better described by Hooker and Arnott, in Bot. Beechci/, p. 323, imder the name 

 of L. corymbosum, except that the older fruiting racemes are elongated. The petals 

 are white and conspicuous ; the stamens 6. Some specimens are nearly glabrous, 

 others granulose and minutely hirsute-pubescent. I suspect that L. sordidum, Gray, 

 PI. Wright, p. 10, is only a late and depauperate state of the same species, pro- 

 ducing diminished flowers. 



L. Wrightii (sp. nov.) : annuum, humile, hirsutulum ; caulibus difi"usis ; ramis 

 brevibus ; foliis caulinis spathulatis dentatis vel incisis, imis et radicalibus sa'pius 

 pinnatifidis ; floribus apetalis diandris ; siliculis orbiculatis hispidulis apice bifido 

 (sinu angustissmo) subalatis pedicello complanato plerumque longioribus ; cotyle- 

 donibus incumbentibus. — Valley of the Pecos, in alluvial soil ; May. Also sandy 

 hills on the Rio Grande, near El Paso ; March. (855.) — Plant 3 to 6 inches high, 

 flowering when only an inch high, from an annual root. Fruiting racemes an inch 

 long or more, dense. Silicles 2 lines long, twice as large as those of L. ruderale, 

 beset with short and acute hispid spreading hairs ; the short pedicel as broad and 

 flat in proportion as in L. latipes, Hook. The low and spreading stems, the larger 

 pods, which are decidedly wing-margined at the apex, and especially the short and 

 flattened pedicels, distinguish this from L. ruderale var. lasiocarpum, Engelm. in 

 lift. (coll. Lindh. 1850, No. 459, 460), which is perhaps L. lasiocarpum, Nutt. 



L. INTERMEDIUM (sp. nov.) I similis L. Virginico formae gracili, sed cotyledonibus 

 incumbentibus ! (foliis superioribus rameisque linearibus integerrimis). — Ra- 

 vines of the Organ Mountains, northeast of El Paso; April, (1320). (Also 

 near Austin, Texas, 1848; and New Braunfels, Lindheimer?) — This plant is ex- 

 actly like a small and slender form of L. Virginicum; except that the upper leaves 

 are nearly all linear and entire, and the cotyledons are incumbent. It is glabrous 

 or nearly so ; the white petals are perhaps rather larger and more conspicuous than 

 in L. Virginicum ; the stamens are only two ; and the silicles are orbicular. On the 

 other hand, it accords so perfectly with all the indigenous North American L. 

 ruderale I possess (such, for instance, as Fendler's No. 45, except in having petals, 

 that I cannot believe them to be specifically distinct. All these, however, diftcr 

 from my specimens of L. ruderale from Europe in their orbicular (not oval) pods, 

 of about twice the size. 



