URTICACEjE. * 157 



46. P. sessiliflora, Wedd. ! Straight, glabrous : leaves elliptical, pointed, cuueate at 

 the base, 3-nerved (or triplinerved), serrate beyond the middle : serratures pointed : rha- 

 phides linear on the upper side (obsolete or none beneath) ; cymes monoecious, unisexual, 

 contracted, 4 times exceeded by the slender petiole, subsessile, corymbiform-branched, <J 

 superior, $ inferior. — Urtica, Sw. ! U. variegata, Spreng. Pilea, Seem. ! — Nearly allied 

 to the preceding; leaves 3"-2" long, 18"'-10"' broad: petiole 12"'-6"' long, dilated at the 

 top. — Hab. Jamaica !, Sw., Macf., Wils., Wullschl.,'m the central and western districts; 

 [Darien !]. 



ft Cymes exserted, lax, long-peduncled. 



47. P. semidentata, Wedd. Straight, glabrous ; leaves lanceolate or elliptical-lanceo- 

 late (the inferior smaller, elliptical), acuminate, triplinerved, minutely repand-serrulate be- 

 yond the middle : rkaphides linear on the upper side ; cymes dioecious, expanded, nearly 

 as long as the leaf, long-peduncled, $ few-clustered, $ many-branched, branches filiform. 

 — Urtica, Pair.— Stem 1' high, somewhat succulent ; leaves 3"-4" long, 8"'-20"' broad, 

 callous on the margin ; lateral nerves disappearing in the arches towards the middle of the 

 lamina: petiole 4"'-6"' long. — Hab. Antigua!, Wullschl.; [Portorico, S. Thomas]. 



48. P. elegans, Wedd. Straight, glabrous ; leaves ovate-oblong, pointleted, or shortly 

 acuminate, triplinerved, repand-serrate with the base entire : serratures bluntish, spreading : 

 rhaphides linear, on the upper side ; cymes monoecious, unisexual, nearly as long as the leaf, 

 long-peduncled, $ contracted, undivided, $ expanded, many-branched. — P. Goudotiana, 

 Wedd. ! — Stem 1' high ; leaves 3"-4" long, 1 V'-l" broad, rounded or minutely subcordate 

 at the base : lateral nerves disappearing in the arches above the middle of the lamina : petiole 

 4"'-6"' long, twice as long as the oblong, deciduous stipules. — Hab. Dominica!, Imr. ;■ 

 [Guadeloupe to Venezuela ! and New Granada !]. 



49. P. densiflora, Klh., Wedd. ! Straight, glabrous (or glabrescent on the leaves be- 

 neath) ; leaves oblong-lanceolate, lanceolate or elliptical, acuminate, 3-5-nerved (or shortly 

 triplinerved), coarsely crenate-serrate with the base entire: serratures pointed: rhaphides 

 linear usually on both sides ; cymes dioecious, expanded, as long as or exceeding the leaf, 

 long-peduncled (or the $ sometimes contracted and equalling the petiole), many-branched 

 in both sexes : the branches forming interrupted spikes. — Stem 3'-4' high, suffrutescent ; 

 leaves 5"— 2" long, 24"'-8'" broad, rouuded or minutely cordate at the base : lateral nerves 

 (or first pair of them) disappearing in the arches near the top of the lamina : petiole 8"'-6'" 

 (12"'-2'") long: stipules oblong-lanceolate, 4"' long ; $ flower- clusters diam. of a pea, ? 

 much smaller. — Hab. Jamaica!, A I., Wils., March, Wullschl., common. 



50. P. grandis, Wedd. ! Straight, glabrous ; leaves large, ovate, pointleted, usually 

 minutely cordate at the base, triplinerved or 3-nerved, coarsely crenate with the base entire: 

 serratures rounded or bluntish : rhaphides small, linear, on both sides ; cymes dioecious, 

 (rarely monoecious, unisexual,) expanded, exceeding the petiole and exceeded by the leaf, 

 long-peduncled, many-branched in both sexes : the branches forming nearly contiguous 

 spikes. — SI. t. 83. /. 2. — Urtica grandifolia, L., ex eit. SI. (non Sw.). — Stem several 

 teet high, suffrutescent ; leaves 6" long, 3" broad : lateral nerves as in the preceding, veins 

 straightish, prominulous ; petioles 2" long, nearly as long as the internodes ; stipules large, 

 ovate-oblong, 10"' long ; <? spikes oblong. — Hab. Jamaica !, Macf., Al., Pd., March, in 

 moist woods. 



*** Leaves serrate, hispid, unequal. Stem branched, suffrutescent. 



51. P. rufa, Wedd.! Branches rusty-hispid ; leaves elliptical or elliptical-lanceolate, 

 pointed, sharply serrate, hispid with scattered hairs, triplinerved : one of the pair usually 

 roundish, subsessile : rhaphides linear on the upper side and much smaller ones beneath : 

 stipules roundish, spreading, persistent ; cymes androgynous, contracted, spiciform, shortly 

 exceeding the stipules. — Urtica, Sw. /—Stem ascending, 1' high ; larger leaves 18"'-8'" long, 

 8"'-4'" bread, smaller 4'"- 2'" diam. : petiole 4"'-l'" long : stipules 2'" diam., rusty -mem- 

 branaceous.— Hab. Jamaica !, Sw., Macf, in rocky hills. 



