URTICACE.E. 153 



tubular, <? 2-androus, ? with a free ovary and penicillate stigma. Ovule erect, atropous. 

 Pericarp nucamentaceous. — Trees ; leaves peltate-roundish, usually palmatilobed, with the 

 lobes subentire, and white-tomentose beneath ; peduncles axillary .- receptacles ebracteolale, 

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

 to the top, $ thicker than the $ ones. 



24. C. peltata, L. Leaves d-T-lobed to -| of the diameter, scabrous above, white- 

 tomentose beneath, with the nerves usually glabrescent : lobes ovate, pointleted ; $ recep- 

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

 — SI. t. 88./. 2, et t. 89. Desc. Fl. I. t. 75.— A middle-sized tree: medulla septate; 

 leaves above 1' diam. : inferior lobes shorter. — Hab. Jamaica!, Al., Wullschl. ,- Caribbean 

 Islands!; [Venezuela]. 



25. C. palmata, W. Leaves ^{-W-T)-lobed to the middle, scabrous or glabrescent 

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

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



Tkide III. MOBEJE. — Flowers unisexual. Stamens inflexed in the bud, usually elastic. 

 Ovule pendulous, campy lotropo us. 



8. TROPHIS, L. 



Flowers dioecious, spicate. $ : Calyx 4-fid, valvar, 4-androus : stamens exserted. 9 : 

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

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



26. T. americana, L. Branches glabrescent ; leaves ovate-oblong or oblong, point- 

 leted, quite entire, glabrous : principal veins 6-8-jugal, arched ; S spikes" cylindrical, 

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

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

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

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



9. MACLURA, Nutt. 



Flowers dioecious, spicate or capitate. <? : Calyx 4-partite, slightly imbricate, 4-androus : 

 stamens exserted. $ : Calyx-segments 4, at length indurated at the connivent top. Ovary 

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

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



27. M. tinctoria, Bon (non Miq.). Usually unarmed ; leaves subentire, oblong, 

 acuminate, subtruncate at the base, glabrescent or pubescent on the nerves beneath ; <J 

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

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

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

 do Sul !]. 



28. M. Xanthoxylon, Endl. Usually spiny ; leaves coarsely serrate, ovate-oblong 

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



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

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

 Jacq. Broussonetia tinctoria, Kth.~ Hab. Trinidad!, Or. ; [Mexico, Panama!, Bahia!]. 



10. DORSTENIA, L. 



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

 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 stcmless herbs, with the peduncles scapiform, and the mem- 

 branaceous leaves rosulate from a nodose rhizoma. 



