12 The Botanical Gazette. [January, 
monoecious or dicecious; cymes unisexual, subsessile, brac- 
teose, densely flowered; the staminate semi-globose (5-8! 
high), axes explanate, fascicled pedicels filiform (3'), perianth 
before anthesis obpyramidate (0.75') with inflexed cucullate 
tips, rudimentary ovary nearly obsolete; pistillate cymes 
smaller and glomeruliform, staminodes most minute, exterior 
segments of perianth small.—Distinguished chiefly by the 
long pedicels of staminate flowers.—Pendent from irrigated 
cliffs of the Barranca of Rio Samald, Depart. Retalhuleu, alt. 
toc", spt .1692, }..D::S., no.. 2,751: 
Pilea pleuroneura. — Rooting at woody base, ascending 
(12-18"), branching composite, branchlets complanate and 
alate, glabrous, glandulose: stipules minutely semi-obicular; 
leaves distichous, subsessile, lanceolate (7-9x1.5-2'), the 
smaller in the pair half as long and elliptical, apex obtuse, 
2—5-crenate, the inferior half entire and cuneate, penninerved, — 
the stronger 7-9 nerves ascending to margin, veins immersed, 
cystoliths present only on upper surface and linear: dicecious; 
staminate flowers not seen; the pistillate fasciculate at apex 
of longer (I-1.5') peduncle, short pedicels recurved, cucullate 
segment of perianth twice exceeding the others, achenium 
obliquely ovate (0.5') and rubro-punctate.—Pansamali, alt. 
3,800", June 1885, von Tiirckheim, no. 754. : 
Pilea senarifolia. — Herbaceous, glabrous; stem repent, 
branches ascending (12~-18"), opposite or verticillate branch- 
lets 6-alate: stipules scarious, minutely oblong, persistent; 
striolate with fusiform cystoliths: moncecious; unisexual 
cymes from adjacent axils in the whorl; the staminate twice 
to thrice exceeding petiole, 2—3-flowered, peduncle and pedi- 
cels subequal, perianth in przfloration globose (1'), tips of 
segments pileate, rudimentary ovary none; pistillate cymes _ 
minute, few-flowered, segments of perianth somewhat un- — 
equal.—Anomalous by leaves all strictly verticillate. —On old 
trunks of trees, Chiul, Depart. Quiché, alt. 8,000, April 
1892, Heyde & Lux, no. 3,145. 
Pilea Quichensis. — Herbaceous; stem simple (20-30); 
slightly pubescent, sulcate: stipules deltoid (1.5'), decidu- 
