RUBIACEA. 63 
Soutn Mexico, woods of El Sabino, north of the city of Mexico, at 6500 feet (Galeotti, 
2596).—CoLomBIA; Perv. 
We have not seen the Mexican specimens referred to this species by Martens and 
Galeotti. 
3. Relbunium hypocarpium, Hemsley. 
Rubia hypocarpia, DC. Prodr. iv. p. 591. 
Valantia hypocarpia, Linn. Sp. Pl. p. 1491. 
Sout Mexico, Mirador (Liebmann, 225), Cordillera of Oaxaca, at 4000 feet (Galeotti, 
2622), Vera Cruz to Orizaba (Miller, 1551) ; Costa Rica, Cartago (Ersted) ; Panama, 
Veraguas (Seemann, 1599).—Generally dispersed in Tropical Sourn America and the 
West Inpies. Hb. Kew. 
4, Relbunium levigatum, Hemsley. 
Rubia levigata, DC. Prody. iv. p. 591. 
Mexico (Henke) ; Costa Rica, Cartago, 5000 feet (Grsted) ? 
5. Relbunium microphyllum, Hemsley. 
Galium microphyllum, A. Gr. Pl. Wright. i. p. 80. 
Texas; New Mexico; Arizona.—Norta Mexico, Sierra Madre (Seemann, 2062, 
2063), region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 309, 310); 
SoutH Mexico, Zimapan (Coulter, 186). Hb. Kew. 
6. Relbunium polyplocum, Hemsley, Diag. Pl. Nov. pars tertia, p. 53. 
Herbaceum, repens vel procumbens, omnino hispidulo-pilosum, densissime ramosum, ramis fere 
filiformibus, internodiis brevibus, foliis parvis quaternis linearibus vel lineari-oblongis vix acutis 
trinerviis, nervis lateralibus juxta marginem. 
Herba annua vel perennis, omnino hispidulo-pilosa (pilis patentissimis albescentibus), densissime 
et intricatissime ramosa, ramis fere filiformibus, prominenter tetragonis, internodiis foliis zequi- 
longis vel duplo longioribus. Folia nitida, duriuscula, arcte sessilia, quaterna, linearia vel 
anguste lineari-oblonga, 2-3 lineas longa, vix acuta, trinervia, nervis lateralibus marginalibus, 
costa decurrente. Flores in involucro tetraphyllo solitarii, sessiles, pedunculis solitariis quam 
folia paullo longioribus. Fructus albo-granulosus, glabris. . 
Norra Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 308); 
Soutn Mexico, Mirador (Linden, 516; Liebmann, 243, 244). Hb. Kew. 
This closely resembles 2. microphyllum, which, however, is glabrous and less intri- 
cately branched. 
73. GALIUM. 
Galium, Linn. Gen. Plant. n. 125; Benth. et Hook. Gen. Plant. nu. p. 149. 
About 253 species have been described ; but Bentham and Hooker think they might 
be reduced to 150. They are spread over all temperate and most subtropical regions. 
1. Galium asperrimum, A. Gr. Pl. Fendl. p. 60. 
New Mexico; Arizona.—Norra Mexico, Mount Graham, Southern Arizona (Rothrock). 
