588 DIOSCORE/E. 



long-petioled ; capsule still unknown— Hab. Jamaica !, Macf. ; [Portorico !, French islands !, 

 Guiana !]. 



6. D. Kegeliana, Or. Stem subcylindrical ; leaves cordate-deltoid, cuspidate, gla- 

 brous, membranaceous, 7 -nerved with the exterior pair united, twice as long as the petiole; 

 <J flowers in filiform, simple, or slightly compound racemes : rhachis hairy ; ? flowers 

 distantly glomerate in spikes ; capsule elliptical, chartaceous : seeds surrounded by a wing. 

 —Leaves 2" diam. ; capsule 10"'-12'" long, 8"'-10'" broad.— Hab. Trinidad!, Cr.; 

 [Guiana!]. 



7. D. pilosiuscula, Berter. Stem subcylindrical, striate; leaves subcordate-ovate 

 (or subcordate-roundish), minutely pointleted, hairy beneath, 7-H(-13)-nerved with the 

 exterior nerves cohering, twiee-thrice as long as the petiole ; [ $ flowers fascicled in simple, 

 filiform racemes ■. rhachis pubescent] ; $ flowers single, iu long, filiform, hairy spikes ; 

 "capsule oblong: [seeds winged at the base"]. — Helmia, Kth. The characters included 

 in brackets, ara taken from B. remotiflora, Kth. {Helmia Ehrenbergiana, Kth.), which is 

 apparently a continental form, with roundish, more pubescent leaves, and the number of 

 their nerves increased. Leaves 2"-3" long ; ? spikes peduncled, ofteu geminate. — Hab. 

 Jamaica!, 2d., M'Nai. ; [Haiti; the continental form ranges from Mexico to Panama!]. 



Sect. 3. Lvchnostemon. — Stamens 3 fertile, 3 sterile, inserted into the rotate perigone : 

 the fertile 2-fid at the summit, with distant anther-cells. — Leaves alternate, membra- 

 naceous. 



8. D. multiflora, Prl. Glabrous; stem subcylindrical; leaves cordate-deltoid, cus- 

 pidate, glabrous, 9-11 -nerved, with the exterior pair cohering and the veins in a loose net- 

 work, dotted with minute, pellucid lines : basilar sinus open ; <J spikes simply branched 

 below, filiform : flowers distantly glomerate ; capsule roundish-oval, membranaceous-char- 

 taceous .- seeds surrounded by a wing. — Plum. Ed. Burm. t. 117. f 1- — D- altissima, Sieb. 

 Mart, (non Lam). D. Sieberi, Kth. — Leaves 3"-5" diam. ; capsule 1" long, 10'" broad.— 

 Hab. Jamaica !, all coll., common ; S.Vincent!, Guild.; [Martinique; Venezuela!]. 



Sect. 4. Allactostemon. — Character of Lychuostemon, but no sterile filaments, and 

 anther-cells approximate. 



9. D. lutea, Mey. ! Glabrous; stem cylindrical; leaves cordate-roundish, or cordate - 

 deltoid, cuspidate, 9-7(-ll)-nerved with the primary veins transverse, (rarely dotted with 

 pellucid lines) •. basilar sinus open ; spikes simple, filiform : $ flowers distantly glomerate ; 

 capsule oblong, membranaceous : seeds surrounded by a narrow wing above : wing obovate- 

 roundish at the produced base. — Veil. Fl. Plum. 1ft. t. 124. — D. heptaueura, Veil. D. sa- 

 tiva, Gr. Biosc. Brasil. (erclus. Syn. Linn.). B. saliva, L., comprises : 1°, B. Chffortiana, 

 l&m. (H. Cliff, t. 28), which is probably a form of B. villosa, L. ; 2°, B. multiflora, Prl. 

 (ex. syn. Plum, and P. Br.) ; 3°, B. altissima, Lam. (ex. syn. SI.) ; 4°, the East Indian 

 species, figured by Rheed. 8. t. 51 ; and 5°, the contested plant, quoted from Rumph. 5. 

 t. 180. — Leaves 3"-6" diam. ; capsule 10'" long, 5'" broad : seeds (the wing included) 3'"- 

 4'" long : wing \\"' diam. at the base, \'"-i'" above.— Hab. Antigua !, Wullschl. ; Trini- 

 dad !, Cr. ; [Cuba ! to Brazil !J. 



2. RAJANIA, L. 



Samara one-seeded by abortion : seed flat, wingless. — Habit of Bioscorea. 



10. R. ovata, Sw. ! Leaves ovale, shortly acuminate or pointleted, rounded-truncate 

 or subcordate at the base, 5-T-nerved, long-petioled ; flowers pedicellate, J " compound- 

 racemose with miuute branches ;" samara oblong, obliquely rounded at the summit : wing 

 much longer than the seed. — Leaves 2"-3" long ; samara 12"'-14'" long, about 4'" broad 

 above. — Hab. Jamaica!, Pd., Manchester; [Haiti!]. 



.11. R. pleionenra, Gr. (n. sp.J. Leaves cordate-roundish (or cordate-ovate), deltoid- 

 pointed or cuspidate, 9 nerved, twice as long as the petiole : basilar sinus deep ; flowers 

 pedicellate, 3 compound-racemose with minute branches ; samara semiobovate-oblong, 

 bluntish, pointed at the incurved base : wing thrice as lona as the seed. — R. hastata, Kth.? 



