SCHOMBURGK'S GUIANA PLANTS. 293 
Calycis tubus 14 lin. longus, lacinize 4, subulatee. Filamenta 
longiora hinc glandulifera. Capsula apice glanduloso-pilosa. 
—Mountains of Mawacca. Schomburgk, n. 1015. 
325. M. parvifolia (sp. n.) ; fruticosa, ramis hispidis, foliis 
longiuscule petiolatis ovali-oblongis ellipticisve utrinque ob- 
tusis v. basi angustatis supra strigoso-setosis subtus breviter 
rufo-villosis, panicula terminali subcorymbosa laxa pauciflora 
subfoliosa, calycibus glanduloso-pilosis, capsula 3-loculari.— 
Near the last in character, but very different in appearance; 
the leaves being seldom more than an inch long, and the 
panicle short, composed of a few dichotomous cymes in the 
Upper axils.—Mount Roraima, Schomburgk. ^ Blanchet's 
n. 2900 appears to be M. Radula, DC. a 
- TRIBE ll. RHEXIE®Æ®. — 
| From this tribe, Siphanthera must be excluded as belonging 
to Lavoisieree, and Adelobotrys is of doubtful affinity, most 
Probably very near Chetogastra. Among the true Rheziee, 
a from East India, Rhexia from the United States, 
and Heteronoma, (including Pachyloma according to Martius) 
from tropical America, are known by their tubular or elon- 
gated calyx, and paniculated inflorescence; Leiostegia has 
the same calyx, but with axillary flowers; Tricentrum is said 
to have very peculiar anthers; Zvembleya and Microlicia 
are both pentamerous and decandrous, and have been dis- 
tinguished by the number of cells of the capsule, which are 
2 or 3 in Microlicia, (including Noterophila, Mart.), 5 in 
A an unnatural distinction, as it removes T. rosma- 
rinifolia from a species of Microlicia, from which it cannot 
otherwise be known, and joins it with the Abrahamia, which . 
it does not resemble at all; Spennera, (including Ernestia), 
is either pentamerousor tetramerous, but is always readily dis- 
criminated by the thin foliage, the slender loose panicles and - 
Conical buds; Marcetia and Comolia, always tetramerous, are 
much branched low shrubs or decumbent perennials with 
axillary flowers, the one having four, the other two cells —— 
to the capsule; Dicrananthera is a little erect annual with 
