V. PLANTS WRIGHTIAN^. 69 



additional flower. Petals three lines long. Stamens almost equally inserted in the 

 bottom of the calyx, scarcely unequal in length, not exceeding the petals. Style fili- 

 form, much exserted. — From the section Heimia this plant diff'ers only in its pur- 

 ple flowers, elongated peduncles, and herbaceous habit ; from Decodon, in its soli- 

 tary hexamerous flowers, and its equal and equally inserted stamens ; and from 

 Nescea proper, in the one-flowered peduncle with small bracts, in which respect, 

 however, as in its foliage and tendency to bear three flowers on the peduncle, it 

 agrees with N. Candollei, Guill. 8f Perrotet.* 



187. Ltthrum alatum, var. linearifolium. Gray, PL Lindh. 2. p. 188. Low 

 grounds, Western Texas ; May. — The petals are smaller than in Lindheimer's plant 

 (which occurs again in the collection of 1850). L. flexuosum, Lagasca (L. Grsef- 

 feri. Tenor e), perhaps belongs to the same species. 



188. L. alatum, var. pumilum. Gray, PI. Lindh. I. c. Rio Nueces, in shallow 

 water. — L. flagellare, Shuttleworth, PL RugeL No. 232, from Florida, is interme- 

 diate between this and the var. ovalifolium, PL Lindh. L c. 



ONAGRACEJ^. 



•f Epilobium coloratum, MuhL in Willd. Emim. \. p. 411. Along the Limpia; 

 August. 



189. (Enothera Jamesii, Torr. ^ Gray, FL 1. p. 693 ; Gray, PL Lindh. 2. p. 

 189. Along the San Pedro River ; also found eastward as far as to Austin. The 

 wild plant is from four to six feet high, and with flowers as large as the cultivated, 

 viz. five inches in diameter. 



190. CE. biennis, Linn., yar. Along the Limpia. — This is the same strigose- 

 hirsute variety as No. 218, PL FendL, a form which is common in Oregon and 

 along the Rocky Mountains. 



t CE. BiFRONS, Don, in Siveet, Brit. FL Gard. 4. t. 386 ; Hook. Bot. Mag. t. 3764. 

 (E. heterophylla, Spach, Onagr. p. 28. Plains of Western Texas. — To this must 

 needs belong No. 56, PL Lindh., referred to (E. rhombipetala, from which it difi'ers 

 in the broad and somewhat cordate bracteal leaves and more or less obtuse petals. 

 It accords with No. 74 of Drummond's third Texan collection; but the lower leaves 

 incline to be pinnatifid, as they strikingly are in No. 53 of Drummond's second col- 

 lection, which is the CE. heterophylla of Spach. 



191. CE. albicaulis, Nutt. in Fras. Cat, 8f Gen. 1. p. 245. Var. subcinerea; 

 foliis sinuato- seu pinnatifido-dentatis ; caule lignescente ramosissimo. — Valley of 

 the Rio Grande, 60 or 70 miles below El Paso, in sandy soil ; Oct. — I employ the 

 oldest name of a very polymorphous species, which also varies exceedingly in size 

 and duration ; flowering sometimes as a low annual, and again, becoming lignescent 

 at the base and branching copiously, it apparently endures for a longer period. 

 The same species, but with less toothed leaves, is CE. pinnatifida. Gray, PL FendL 

 p. 44 (No. 224), where some remarks are made upon the extent of the species, which 



* Nessea (Heimia) salicifolia was gathered by Dr. Gregg in Nortliern Mexico, from Camargo to Mon- 

 terey and Queretaro. 



VOL. m. ART. 5. — 10. 



