URTICACEJl. 153 



litbular, S. 2-androiis, $ with a free ovary and penicillate stigma. Ovule erect, atropous. 

 Pericarp nucamentaceous. — Trees ; leaves feliate-roundish, usually palnmtiloied, with the 

 lobes subentire^ and white-tomentose beneath ; peduncles azillary : receptacles ebracteolate^ 

 but before flowering enclosed within a large bract, covered with the fiowers from the base 

 to the top, $ thicker than the $ ones. 

 ('% 24. C. peltata, L. Leaves 9-T-lobed to ^ of the diameter, scabrous above, wMte- 

 tomentose beneath, with the nerves usually glabrescent : lobes ovate, pointlcted ; <? recep- 

 tacles numerous, shortly stipitate (1^" long, 1"' diam.), ? 4-2, sessile (2" long, 3'" diam.). 

 — SI. t. 88. /. 3, et t. 89. Besc. PL ]. t. 75. — A middle-sized tree : medulla septate ; 

 leaves above 1' diam. ; inferior lobes shorter.— Hab. Jamaica!, Al., WuUschl. ; Caribbean 

 Islands ! ; [Venezuela] . 



25. C. palmata, W^. Leaves ^l^-W-D-lobed to the middle, scabrous or glabrescent 

 above, white-tomentose beneath : lobes obovate-oblong, blunt ; S receptacles .-. . , $ 4, 

 sessile (IJ" long, 2'" diam.). — Caribbean Islands !, [Guadeloupe 1, Guiana !, Para]. 



Tribe III. MOUMM. — Flowers unisexual. Stamens inflexed in the bud, usually elastic. 



8. TROPHIS, L. 



Flowers dioecious, spicate. S '■ Calyx 4-fid, valvar, 4-androus : stamens exseited. ? : 

 Calyx tubular, contracted at the 4-dentate hmb. Ovary adnate : style 2-partite. Pericarp 

 baccate. Embryo exalbuminous.- — Milky trees ; spikes axillary, peduncled. 



26. T. americanaj X. Branches glabrescent; leaves ovate-oblong or oblong, point- 

 leted, quite entire, glabrous: prineijial veins 6-S-jugal, arched; S spikes cylindrical, 

 puberulous; usually geminate, $ shorter, 4-8-flowered, about twice as long as the petiole ; 

 berry ovoid. — JBr. Jam. t. 37./. 1. Sesc. Fl. 1. t. 19.— A low tree ; leaves rounded at the 

 base, 8"-4" long ; g spikes 2", ? 4'" long : peduncles 4'", berry 4"'-6"' long.— Hab. 

 Jamaica!, Jl., Wils., March; [Cuba!]. 



9. MACLUEA, Nutt. 



Flowers dicEcious, spicate or capitate. 3 : Calyx 4-partite, slightly imbricate, 4-androus : 

 stamens exsei-ted. ? : Calyx-segments 4, at length indurated at the conniveut top. Ovary 

 free : style simple, filiform, exserted. Achenia covering the globose, somewhat fleshy recep- 

 tacle. — Trees ; spines axillary or none ; inflorescence axillary, pedtaicled. 



27. ^M. tinctoria, Don {non Miq). UsuaUy unarmed ; leaves subentire, oblong, 

 acuminate, subtmncate at the base, glabrescent or pubescent on the nerves beneath ; S 

 spikes cylindrical ; ? flower-heads globose, nearly as long as the petiole ; styles nearly as 

 long as their diameter.- 5^. t. 158. /. 1 ; Desc. Fl. 6. t. 431.— Moras, L., Herb. Macl. 

 subintegerrima, Miq. — Hab. Jamaica 1, all collect. ; [Venezuela ! to Peru ! and Rio Grande 

 doSul!]. 



28. M. Xanthoxylon, Sndl. Usually spiny; leaves coarsely serrate, oy/ate-obloiag , 

 or oblong, pointleted, rounded or subcordate at the base, which is slightly unequal, glabrate ; / 

 3 spikes cylindrical ; ? flower-heads globose : styles longer than their diameter. — Flum. 



Ed. Burm. i!. 204. Jacq: Amer. Pict. t. 263./. 76. Mart. Fl. Bras. 12. t. 53.— Morus, 

 Jcfcq. Bronssonetia tinctoria, jRA.— Hab. Trinidad!, Or.; [Mexico, Panama!, Bahia!]. 



10. BORSTENIA, L. 



Inflorescence androgynous : flowers naked, inserted into the alveoli of a flat receptacle, S 

 2-4-androus, $ with a lateral, bidentate style. Pericarp irregularly bivalved. Embryo 

 uncinate, exalbuminous.- Herbs or shrubs; stipules usually persistent ; receptacles axillary., 

 long-peduncled, solitary. 



The West Indian species are stemless herbs, with the peduncles scapiform, and the mem- 

 branaceous leaves rosulate from a nodose rhizoma. 



