70 PLANTS WRIGHTIAN^. T. 



the Hookerian herbarium fully confirms. No. 176 of Geyer's Oregon collection, 

 referred by Hooker to CE. pallida (in Lond. Jour. Bot. 6. p. 222), is exactly the same 

 as No. 224 of Fendler. These forms run insensibly into those with longer, lance- 

 olate or linear leaves, either repand-dentate or nearly entire, very minutely pubes- 

 cent, and vv^ith very smooth and w^hite stems, — the CE. albicaulis, Nutt., Hook. Fl. 

 Bar. -Am., See. Sometimes the plant attains the height of four feet, according to 

 Geyer, and is very bushy. CE. pallida, Dougl., judging from Douglas's own speci- 

 mens, and the figure in the Botanical Register (t. 1142), differs from the narrow- 

 leaved, true CE. albicaulis, Nutt. only in its smoothness, losing nearly all trace of the 

 fine pubescence ; while Nuttall, Tolmie, and others, have under this name a bushy 

 form of the plant, with broader and shorter leaves, the very smooth surface often 

 beset Vidth a few hairs. CE. leptophylla, Nutt., is the same as the last, very bushy, 

 and with crowded, small leaves on the branches ; in Burke's Oregon collection we 

 have the same thing, but almost as cinereous-pubescent as the specimens of Wright 

 with which this account began, and the leaves, though narrower, are as strongly 

 toothed. This brings us round to the CE. pinnatifida, Nutt., the CE. albicaulis, 

 Pursh (of which the original specimens of Bradbury are the same as Nuttall's, and 

 also Geyer's No. 37) ; which begins to flower when only three or four inches high, 

 but usually continues through the season; sometimes bearing pinnatifid leaves, 

 such as Fendler's No. 223, and sometimes with barely toothed or nearly entire 

 leaves, as in Fendler's No. 224. Between these two, Wright's No. 191, character- 

 ized above, is exactly intermediate. 



192. OE. sPECiosA, Nutt. ; var. foliis lanceolatis subintegerrimis ; flore minore. — 

 Hills along the Leona ; June. ~ This species is exceedingly variable in foliage. 



193. CE. Spachiana, Torr. Sf Grai/, Fl. 1. p. 498. Blennoderma Drummondii, 

 Spach, Monogr. Onagr. addend, p. 87. CEnothera Drummondii, Walp. Rep. 2. p. 85, 

 non Hook. Near Austin, Texas : also gathered on the Rio Brazos by Lindheimer. 



194. CE. (Megapterium) Missouriensis, Sims, Bot. Mag. t. 1592; Gray, PI. 

 Lindh. 2. p. 188 (var. a, the narrow-leaved form). Gravelly banks of the Nue- 

 ces ; June.* 



■j- (E. (Lavauxia) triloba, Nutt. ; Hook. Bot. Mag. t. 2566 ; Grai/, PI. Lindh. 

 2. p. 189. Near Austin, Texas. — Biennial. The dehiscence is loculicidal, and I 

 think never also septicidal, as I stated in the Flora of North America. — Although 

 with a more crustaceous or lignescent pod, with small and even wings, and a truly 

 perennial caudex, I consider the following to form a second species of this section. 



f CE. (Lavauxia) brachycarpa (sp. nov.) : acaulescens, pube brevi cinerea ; 



* Here belongs No. 268 of Geyer's Oregon collection, referred to CE. Drummondii in Lond. Jour. 

 Bot. 6. p. 221. The latter is only found in the low country of Texas. — GE. guttulata, Geyer, I. c, is the 

 same as CE. canescens, Torr. in Fremont'' s 2d Rep., as referred in PI. Fendl. p. 44. It was also gath- 

 ered by Wislizenus, at Rock Creek, New Mexico. — The specimens of CE. heterantha, Nutt., collected in 

 Oregon by Geyer (No. 406), and especially those of Burke, have many of the leaves lyratephmatijid, so 

 that it is not surprising that they should have been referred by Hooker to CE. triloba. One of Burke's 

 specimens in the Hookerian herbarium has ripe capsules : these are ovoid-oblong, barely acute, bearing 

 the persistent remains of the whole calyx, smooth and even, the valves with a slightly prominent smooth 

 medial rib. Seeds ovoid, reticulate-pitted under a lens, with a slender and inappendiculate rhaphe. 



