462 PROCEEDINGS OF THE AMERICAN ACADEMY. 
tended by two leaf-like bracts, the lateral branches or peduncles not pro- 
liferous, reflexed in fruit. — Torr. & Gray, F1. ii, 20; Gray, Pl. Lindh. ii 
215, & Syn. FI, N. A. i. pt. 2,36. G. Texanum, Scheele, Linnea, xxi. 
597. — Louisiana, Hale ; Texas, Lindheimer, nos. 246, 491, Drummond, 
no. 111, Wright (without number), at Belknap, Sutton Hayes, no. 327 
in part, Dallas, May, 1875, Reverchon, Heller, no. 1437 (distributed as 
G. Texense, A. Gray); Missouri, Allenton, 15 June, 1880, Geo. W. 
Letterman; Tennessee, cedar barrens at La Vergne, 16 May, 1882, 
Gattinger. 
VaR. LEIOCARPUM, Torr. & Gray. Stem and leaves nearly glabrous: 
fruit smooth and glabrous. — Torr. & Gray, FI. ii. 20; Gray, Syn. Fil. 
N. A. i. pt. 2, 36.— Texas, Drummond, no. 113, Z. Hall, no. 273, 
Wright (without number), also a specimen of Nuttall’s collection bearing 
the datum “ Red River.” 
§ 2. Fruit hirsute with long and straight (not uncinate-tipped) bristles. 
* Leaves linear or linear-oblong (in G. Wrightii, var. latifolium, often somewhat 
elliptic or oblong-oblanceolate), 1-nerved. 
+ Flowers axillary, solitary or in pairs, subsessile. 
12. G. oresbium. Perennial: stems from a woody base, some 
what cespitose, 1 to 2 dm. high, below often naked and glabrate, nume™ 
ously branched, leafy and pilose-hirsute above: leaves in fours, linear oF 
linear-oblong, 2 to 4 mm. long, 1 mm. or less in breadth, acutish, hirsute 
pubescent, margin revolute, midrib much thickened and prominent be- 
neath, bearing on the under surface near the apex a single large gland : 
corolla about 2.5 mm. in diameter, 4-parted; lobes oblong-ovate, obtuse, 
externally pubescent.— Collected by @. G. Pringle, on dry mountail 
walls, Sierra de la Silla, Nuevo Leon, 16 July, 1889, no. 2542. 
+ + Inflorescence cymose-paniculate: flowers distinctly pedicellate- 
++ Diecious: flowers yellowish. 
G. Fenpiert, Gray. Stems several, erect or ascending, 1.5 to 3 dm. 
high, rising from a perennial base, glabrous or minutely and closely, 
puberulent: leaves linear or linear-oblong, 0.5 to 1.5 em. long, 1 to 
mm. broad, acute or obtuse, glabrous or finely puberulent: flowers 
small: ovary bearing inconspicuous closely appressed hairs, these later 
spreading and becoming more prominent. — PI, Fendl. 60, & Syn. FI. N.A: 
i. pt. 2, 41. G. Rothrockii, Gray, Proc. Am. Acad. xvii. 203, in part 
(as to Rusby’s plant).— New Mexico, Fendler, no. 288, White Mts. 
altitude 2300 m., Wooton, no. 287; Arizona, Mogollon Mts., ie : 
no. 155, Santa Rita Mts., 10 July, 1881, and 25 July, 1884, Pringle: 
Mt. Graham, Rothrock, no. 416, near Fort Huachuca, Lemmon, 00- 290 
