188 Plantce Lindheimeriance. 



(610.) L. alatum, var. (lanceolatum), Torr. &/• Gray, Fl. 

 1. p. 481. L. lanceolatum, Ell. Sk. 1. p. 544. Wet prai- 

 ries, on the Pierdenales. May. — A form with dwarf stems, 

 a foot or less in height, from long, and deeply subterranean 

 root-stocks or stolons. 



f L. alatum, var. -(. Torr. fy Gr. 1. c. — On the Cibolo. — . 

 Leaves mostly alternate. 



f L. alatum, var. linearifolium: caulibus ramosissimis ; 

 foliis linearibus plerisque alternis, floralibus calyce subsequa- 

 libus. — Rocks in the Cibolo River. This and the var. ovali- 

 folium are two extreme forms, on either hand, of what I take 

 to be one polymorphous species ; for which the name L. 

 lanceolatum, Ell., would be much more appropriate than that 

 of Pursh. They may embrace several of the tropical Ameri- 

 can species in the books ; but they pass into one another 

 in such a way that Dr. Engelmann and I can fix upon no 

 reliable distinguishing characters. 



f Ammannia latifolia, Linn.; Torr. fy Gr. Fl. 1. p. 480. 

 (the A. stylosa, Fisch. ^ Meyer, Lid. Sera. Hort. Petrop. 7, 

 p. 41) : var. octandra, staminibus exsertis, stylo brevi incluso ! 

 A. Texana, Scheele in Linncea, 21, p. 588. Upper Guada- 

 loupe. 



ONAGRACEvE. 



391. (Enothera (Megapterium) Missouriensis, Sims, 

 Bot. Mag. t. 1592; Torr. fy Gr. Fl. 1, p. 500: var. A. foliis 

 anguste lanceolatis linearibusve. Megapterium Missouriense, 

 Spach. Rocky plains and slopes, on the Piefdenales and 

 Upper Guadaloupe, and in the dry bed of the Cibolo. April 

 to July; in flower and fruit. Also gathered by Mr. Wright, 

 who sends seeds from which the plant has been raised in the 

 Cambridge Botanic Garden. "Capsule larger or smaller, 

 orbicular, or elliptical-oblong ; corolla from two to five inches 

 in diameter. This runs, by every gradation in the broadness 

 of the leaves into the var. 8. latifolia foliis lato-lanceolatis 

 vel ovato-lanceolatis, (CE. macrocarpa, Pursh. ; Sweet, Brit. 

 Fl. Gard. t. 5. Megapt. Nuttallii, Spach.) Nor, with both 



