GREENMAN. — GENUS GALIUM. 465 



ledges on mountains near Chihuahua, 25 October, 1886, Pringle, no. 741, 

 distributed as G. uncinulatum^ DC, var. ohstipum, AVatson. 



§ 3. Fruit smooth and glabrous, dry, subcarneous or distinctly baccate. 



* Herbaceous, nearly or quite glabrous plants : leaves usually in fours, occasion- 

 ally in lives, sixes, or in whorls of seven. 



f- Leaves linear-oblong to spatulate-oblong, obtuse : fruit dry. 



G. Bkandegei, Gray. Low herbs: stems 0.5 to 1.5 dm. high, usu- 

 ally matted or cespitose-depressed, glabrous or minutely his[)idulous on 

 the angles: leaves 5 to 10 mm. long, 2 to 3 mm. broad, glabrous or 

 slightly hispidulous on the margins and midrib beneath : flowers axillary, 

 solitary or in pairs : pedicels in fruit usually less than 1 cm. in length. 

 — Proc. Am. Acad. xii. 58, «fc Syn. Fl. N. A. i. pt. 2, 38. G. Brandegeei, 

 Wiegand, Bull. Torr. Bot. Club, xxiv. 398. — New Mexico, Valley of 

 the Rio Grande, Brandegee (type) ; extending northward, according to 

 Wiegand, to Saskatchawan. No Mexican specimens of this species have 

 been seen by the writer, although the plant very probably occurs along 

 the northern boundary. 



19. Gr. trifidum, L., var. subbifloruna, Wiegand. Stems weak, 

 ascending, usually much branched, nearly glabrous: leaves 5 to 15 mm. 

 long, about 2 mm. broad, obtuse or slightly rounded at the apex, slightly 

 hispidulous on the margins. — Bull. Torr. Bot. Club, xxiv. 399. — Fed- 

 eral District, Valley of Mexico, Pringle, nos. 6785, 7208. 



Very difficult of separation, and perhaps not distinct from G. Claytoni, 

 Michx. 



1- -t- Leaves (nearly 4 cm. in length) oblong or obovate, cuspidate or aristate : 



fruit subcarneous. 



20. G. glaberrimuni, Hemsl, Glabrous throughout, glaucous; 

 branches striate : leaves in whorls of seven (or the uppermost opposite), 

 sessile, membranous, cuneate : flowers minute, disposed in a loose cyme ; 

 pedicels slender: fruit naked, somewhat fleshy. — Diag. PI. Nov. pars 

 tertia, p. 53, & Biol. Cent.- Am. Bot. ii. 64. — Mexico, Liebmann, no. 

 220. 



•t- 1- -t- Leaves (L5 cm. or less in lengtli) linear-oblong to elliptic-oblong, cus- 

 pidate-acuminate : fruit subcarneous or distinctly baccate. 

 •M- Inflorescence terminating the stems and branches in few-flowered cymes : 



fruit subcarneous. 



21. G-. Galeottianum, Walp. Perennial nearly glabrous through- 

 out, slightly hispid on the stems below: stems slender, reclining or 

 ascending, 3 to 15 dm. long: leaves in fours, linear-oblong to oblong- 



VOL. xxxiii. — 30 



