GREENMAN. — GENUS GALIUM. 461 



G. CANESCENS, HBK. Stems procumbent, nearly glabrous below, 

 spreading-villous above : leaves ovate, 8 to 10 mm. long, 4 to 5 mm. 

 broad, short-acuminate, 3-nerved, membranous, spreading-villous upon 

 either surface, and upon the midrib beneath, ciliate, later somewhat gla- 

 brate: flowers axillary, solitary or terminating the branches in threes: 

 corolla glabrous ; lobes ovate, subacuminate. — Nov. Gen. & Spec. iii. 336. 

 No Mexican specimens of this species have been seen by the author. 

 Ghiesbreglit's no. 886 from Chiapas, referred by Hemsley, Biol. Cent.- 

 Am. Bot. ii. 64, to the above species, is best referred, as pointed out 

 by Dr. Watson, Proc. Am. Acad, xviii. 99, to G. uncinidatum, DC, 

 var. ohstipum. The above description is drawn from Jameson's speci- 

 men collected in the Andes of Ecuador in 1859, which corresponds well 

 with the original description. 



•f- -.- Flowers sessile. 



11. G. proliferum, Gray. Annual, simple or branching from 

 the base : stems ascending or erect, 1 to 4 dm. high, shortly hirsute- 

 pubescent, or nearly glabrous : leaves ovate or oblong-ovate, the lower- 

 most often broadly ovoid and subpetiolate, obtuse, spreading-hirsute upon 

 either surface, often nearly or even quite glabrous : flowers sessile, ter- 

 minating the rather short lateral subhorizontally spreading branches, the . 

 lateral branches often proliferous, bearing a second or even a third flower: 

 corolla white, small: fruit about 3 mm. in breadth on extremely short 

 recurved pedicels, subtended by two or four upturned leaf-like bracts. — 

 PI. Wright, ii. 67, & Syn. Fl. N. A. i. pt. 2, 37. G. virgatum, var. 

 dijfusum, Gray, PI. Wright, i. 80. — New Mexico, Wrirfht, nos. 1112 

 (type), 281 ; Texas, El Paso, Dr. Dieffendorfer, also collected in the 

 same locality by Vasey in 1881 ; Arizona, hills near Tucson, 28 April, 



1883, Pn'ngle, no. 15, on the foothills of the Santa Rita Mountains, 13 

 May, 1884, Pringle^m part; Nuevo Leon, Guajuco, about 40 km. south- 

 east of Monterey, March, 1880, Palmer, no. 411. 



Var. subn-ud-am. Stem and leaves glabrous : fruit only slightly 

 hirtellous. — Foothills of the Sauta Rita Mountains, Arizona, 13 May, 



1884, Pringle, in part, 



G. viUGATUM, Nutt. Stems simple or branched from the base ; 

 branches spreading or erect, 1 to 3 dm. high, somewhat virgate, hirsute- 

 pubescent upon the slightly thickened angles, occasionally neaily gla- 

 brous : leaves oblong-linear to oblong-lanceolate, 1 cm. or less in length, 

 1 to 3 mm. broad, obtusish, usually hirsutish above and on the midrib 

 beneath, ciliate, sometimes nearly glabrous : flowers terminating the 

 extremely short lateral branches or peduncles, appearing axillary, sub- 



