Robinson and Greenman—Genus Lamourouma. 173 
dubious species, founded upon imperfect material, but, if correctly 
described, belonging here. 
= == Calyx costate; segments entire. 
a. Mexican species. 
17. L. renutroria Mart. and Gal.|.c. Stem copiously branched 
above; branches simple, slender, ascending, very leafy: leaves 
narrow, lance-linear, 6 to 10 lines long, crenate-serrulate; mar- 
gins recurved : inflorescence dense.—Walpers, Rep. vi, 652. LZ. 
linearis, Benth. 1. ¢.; x, 541.—Valley of Mexico, Bourgeau, 1113; 
Schaffner, 368; Chiquihuite, Bilimek, 284; Tula, Berlandier, 
1261; San Luis Potosi, Parry and Palmer, 673. Originally col- 
lected in EK, Oaxaca by Galeotti. 
b. South American species. 
18. L. vrireata HBK. Leaves linear-lanceolate, sharply but 
finely serrate: calyx-lobes lanceolate, acute, longer than the tube. 
—HBK. 1. ¢c. ii, 336, t. 167.—Near Quito, Humboldt and Bon- 
pland, Hall, Jameson, Hartweg, Couthouy. 
19. L. Loxrensis Benth. Leaves linear-lanceolate: segments 
of the calyx scarcely longer than the tube.—PI. Hartw. 147, and 
in DC. Prodr. x, 541.—Mountains of Loxa, United States of 
Columbia, Hartweg, 824. A doubtful species, intermediate be- 
tween the preceding and following. 
20. L. SeERRATIFOLIA HBK. Leaves linear-lanceolate, conspic- 
uously and incisely serrate with short divergent teeth HBK. 
l. c. 11, 336, t. 168.—Near Bogota, Mumboldt and Bonpland, 
Goudat. 
+ + Posterior filaments glabrous at the summit and anantherous or nearly so. 
++ Leaves quite entire. 
21. L. IntEGERRIMA Donnell-Smith. Nigrescent in drying: 
leaves narrowly lanceolate, attenuate at both ends, ? to 15 inches 
long, 14 to 24 lines wide, conspicuously 1-nerved; veins very 
obscure: calyx indistinctly 8-costate.—Bot. Gaz. xill, 189.—Pan- 
samala, Alta Verapaz, Guatemala, altitude 4,000 feet, von Zuerck- 
heim (Donnell-Smith’s Pl. Guat.), 1112. 
++ ++ Leaves serrate, serrulate, or crenate. 
== Leaves an inch or more in length. 
22, L. taNcEotaTa Benth. Whole plant nigrescent in drying: 
branches divaricate: leaves narrowly lanceolate, finely, sharply 
and irregularly serrate, 1 to 14 inches long, 1} to 23 lines wide: 
calyx conspicuously 12-costate; segments linear-lanceolate, acute, 
spreading or even reflexed.—Benth. in DC. Prodr. x, 542.— 
South Mexico, Chiapas, Ghiesbrecht, 144, 705; Guatemala, Don- 
nell-Smith’s, 398, 3100. 
