URTICACEiE. 159 



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

 H"-ri" long. 15"'-4"' broad : petiole 10"'-2"' long : stipules ovate, blunt, V" long, per- 

 sistent. — Hab. Jamaica!, Al., WuUschl., on river-banks; Trinidad I, Cr. ; [Portorico, S. 

 Thomas]. 



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

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

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

 long, equalling the petiole or the leaf. — Urtica, Sw. I — Stem 5'-V high, often branched from 

 the base, usually glabrous; leaves 3"-i" long, 24"'-3"' broad :• petiole 13"'-2"' long: sti- 

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

 woods; [Haiti!]. 



ttt Oymes expanded, peduncled. 



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

 top, obtusely serrate vrith 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"' 

 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 ; achenium 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 bluutish 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. 

 M. Bras. 13. t. 68. — Urtica grandifolia, Sw. / U. involucrata, Sims. Pilea diffusa, Gr. 

 Carib. {non Wedd.). P. fuscata, Ziebm. . P. acuminata, Liebm. ! P. grossecreuata, Miq. 

 — Herbaceous branches 8'''-12" long; leaves 3"-3" 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 !, <Sto., ^i*^. ; Dominica!, Imr. ; S.Lucia I, 

 Anders. ; [Mexico ! to Brazil!]. 



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

 bluutish, 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 /a/gf;— Urtica, Sm. I — 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, li'" long ; 

 cymes about 4'"' diam. — Hab. Jamaica !, Sw., WuUschl., in roclcy situations. 



tttt Cymes expanded, sessile. 



63. P. hyalina, Fal. Stem glabrous, erect ; leaves ovate, or ovate-roilndish, pointed, 

 coarsdy 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, er^wnAsA, forming sessile 

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

 t. 69. — Urtica pumila, Euphras.l (non L.). — Nearly allied to P.pumila, As. Gr., of the 

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

 no creeping base ; stem 13''-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 !]. 



SiJBTBiBE 3. SCEHMERIEJll. — Calyx of ? contracted at the 2-4i-dentate (or entire) 

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



14. BCEHMEKIA, Jacq. 

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



