URTICACE^E. 159 



6./. 1-6. — Stem of P. rotundata, but usually larger, the ascending part 6"-2" long ; leaves 

 U"-i" long, Va"~4l" broad : petiole 10"'-2"' long : stipules ovate, blunt, V" long, per- 

 sistent. — Hab. Jamaica!, Al., Wullschl., on river-banks ; Trinidad!, Or. ; [Portorico, S. 

 Thomas]. 



59. P. laxa, Wedd. I Glabrescent ; stem ascending, branched ; leaves ovate, pointed 

 or pointleted, coarsely and acutely serrate, with the base entire, 3-nerved : rhaphides linear, 

 on the upper side ; cymes dioecious , $ contracted, $ few -branched, expanded : peduncles 

 long, equalling the petiole or the leaf. — Urtiea, Sw. ! — Stem 5'-£' high, often branched from 

 the base, usually glabrous ; leaves 3"-J" long, 24"'-3'" broad: petiole 12"'-2'" long: sti- 

 pules broadly oblong, 2'"-]'" long, persistent. — Hab. Jamaica !, Pd., Wils., March, in moist 

 woods; [Haiti!]. 



ttt Cymes expanded, peduncled. 



60. P. ovalis, Gr. [n. sp.). Stem hairy, short, ascending; leaves oval, rounded at the 

 top, obtusely serrate with the base entire, 3-5-nerved, glabrous beneath, with scattered, pellucid 

 hairs on the upper side : rhaphides linear, on the under side ; cymes androgynous, expanded, 

 shortly peduncled, exceeding the petiole. — Stem creeping, and radicant at the base, 4"-6" 

 high, aphyllous below, leafy at the top; leaves membranaceous, 16"'-12"' long, 12"'-6" f 

 broad, ciliate, devoid of rhaphides on the upper, hairy side .- petiole 4 '"-2"' long : stipules 

 broadly oblong, blunt, 2"' long, persistent; cymes pyramidal, 12"'-6'" long: peduncle nearly 

 as long as the petiole ; acheniam minute, obliquely ovate-roundish — Hab. Trinidad !, Cr., 

 near Gaspari. 



61. P. pubescens, Liebm., Wedd.! Hairy (or nearly glabrate) ; branches ascending 

 from a creeping stem ; leaves large, ovate, pointed, or bluntish at the top, coarsely serrate, 

 with the base entire, 3-nerved : rhaphides small, linear, on both sides ; cymes androgynous 

 (or unisexual), corymbiform-paniculate, long-peduncled, usually equalling the leaves. — Mart. 

 Fl. Bras. 12. t. 68. — Urtiea grandifolia, Sw. ! U. involucrata, Sims. Pilea diffusa, Gr. 

 Carib. (non Wedd.). P. fuscata, Liebm. P. acuminata, Liebm. I P. grossccrenata, Miq. 

 — Herbaceous branches 8 f '-12" long; leaves 3"-2" long, subcordate or broadly cuneate at 

 the base : petiole usually 1" long : stipules 4"'-2'" long, subcordate-ovate, spreading, per- 

 sistent ; cymes often 3" diam. — Hab. Jamaica !, Sw., LHst. ; Dominica !, Imr. ; S. Lucia !, 

 Anders. ; [Mexico ! to Brazil!]. 



62. P. diffusa, Wedd. Stem suffrutescent, diffuse, glabrous ; leaves ovate, pointed or 

 bluntish, serrate with the base entire, 3-nerved, glabrescent or pubescent on the nerves be- 

 neath : rhaphides linear, on both sides ; cymes androgynous, expanded, umbelliform, pedun- 

 cled .- peduncle usually as long as the leaf. — Urtiea, Sw. ! — This is distinguished from the 

 preceding by the woody stem, smaller leaves, and chiefly by the small cymes ; leaves 1 2"'-8'" 

 long: petiole 4'" long: stipules ovate, blunt, contiguous at the base, persistent, \\ m long; 

 cymes about 4"' diam. — Hab. Jamaica !, Sw., Wullschl., in rocky situations. 



tttt Cymes expanded, sessile. 



63. P. hyalina, Fzl. Stem glabrous, erect ; leaves ovate, or ovate-roundish, pointed, 

 coarsely serrate, with the base entire, 3-nerved, glabrous, or with a few pellucid hairs on the 

 upper side : rhaphides linear on both sides ; cymes androgynous, expanded, forming sessile 

 verticillastra, exceeded by the petiole; achenium minute, ovate, blunt. — Mart. Fl. Bras. 12. 

 t. 69.— Urtiea pnmila, Euphras.! {non Z.).— Nearly allied to P.pumila, As. Gr., of the 

 United States, the achenium of which however is much longer and conical. Root fibrous : 

 no creeping base ; stem 12"-4" long ; leaves 1" long, often shorter than the petiole : stipules 

 obsolete ; cymes many-branched, nearly from all axils ; achenium i'" long. — Hab. S. Kitts !, 

 Euphrasen ; [Mexico to Brazil !]. 



Subtribe 3. B(EHMERIEJE.—Oalyx of ? contracted at the 2-4-dtntate (or entire) 

 top, or none. — No stinging hairs. Stem usually woody. 



14. BCEHMERIA, Jaeq. 

 Calyx <? 4(-3-5)-partite, ? tubular, 2-4-dentate. Stigma filiform, persistent, hairy on 



