466 PROCEEDINGS OF THE AMERICAN ACADEMY. 



ovate, 5 to 10 mm. long, 1 to 4 mm. broad, acuminate, glabrous or 

 slightly hispidulous on the margins, elongate-glandular-punctate benealh, 

 and with a cluster of glands below near the tip : flowers brownish purple ; 

 lobes of the corolla cuspidate-attenuate. — Rep. vi. 17. G. ui-opetalum, 

 Hemsley, Biol. Cent. -Am. Bot. ii. 66, & v. t. xli. f. 7-9. Rubia acumi- 

 nata, Mart. & Gal. Bull. Acad. Brux. xi. 1, 127. — Southern Mexico, 

 Galeotti, nos. 2631, 2632; Oaxaca, Sierra de San Felipe, altitude 3072 

 m., Pringle, no. 4710, vicinity of La Parada, altitude 2300 to 2700 m., 

 E. W. Ndson, no. 1015. 



++ -M- Flowers axillary or mostly terminating the branches in pairs : fruit dis- 

 tinctly baccate. 



22. Gr. Aschenbornii, Schauer. Perennial, many stemmed 

 from the base : stems reclining or ascending, 3 to 5 dm. or more in 

 length, glabrous or minutely hispidulous: leaves in fours, linear-oblong 

 to elliptic-oblong, occasionally somewhat oblong-lanceolate, 0.5 to 1.5 

 cm. long, 2 to 5 mm. broad, acute, or cuspidate-acuminate, oblong-punc- 

 tate beneath with a large gland or cluster of glands on the lower surface 

 near the apex, glabrous or hispidulous on the margins : flowers at least 

 in the dried state a greenish yellow ; lobes of corolla cuspidate-acumi- 

 nate : pedicels glabrous, in fruit 2 to 6 mm. in length : mature fruit about 

 5 mm, in breadth. — Linna3a, xx. 701. G. geminijlorum, Mart. & Gal. 

 Bull. Acad. Brux. xi. 1, 126; Walp. Rep. vi. 17; Hemsley, Biol. Cent.- 

 Am. Bot. ii. 64, & v. t. xli. f. 1-3. — Valley of San Luis Potosi, 

 Schaffner, no. 841; Zimapan, Th. Coulter, no. 189; Jalisco, volcano of 

 Colima, 3Iarcus E. Jones, no. 218; Federal District, under pines, base 

 of Sierra de Ajusco, altitude 2460 m., Pringle, no. 6597 ; Orizaba, 

 Muller, no. 1444, Galeotti, no. 2604, and according to Hemsley, Lieb- 

 mann, no. 236; Guatemala, Donnell Smith, no 1970, Hegde & Lux, no. 

 3975 (of Doimell Smith's sets), the latter distributed as Relbunium 

 hypocarpium, Hemsl., and according to Hemsle}', Biol. Cent.-Am. Bot. 

 1. c, Bernoulli, no. 292. 



* * More or less suffruticose plants, hirsute pubescent throughout: leaves in 



wliorls of four to seven. 



-1- Stems 5-7-anglecl. 



23. G-. angnlosum. Gray. Fruticose : stems 5-7-angled, covered 

 below with a grayish bark ; branches divaricately spreading, hirsute- 

 pubescent especially on the angles: leaves in whorls of four to seven, 

 linear-oblong or somewhat eHiptic-ol)long, 6 to 10 mm. long, 2 to 4 mm. 

 broad, acute, slightly cuspidate-acuminate, hirsute-pubescent on the 



