ASCLEPIADEiE. 417 



March's Jamaica collection as an introduced plant. By its Hchiies-like habit and powdery 

 pollen it connects Asclepiadea with the foregoing Order. 



1. METASTELMA, R. Br. 



Calyx B-leaved. Corolla small, shortly campanulate, valvate : crown 5-Ieaved, either in- 

 serted into the coroUa-throat and decurrent into the angles of the column or into the column 

 below the anthers and decurrent into the corolla-base. Pollinaria hanging from the base of 

 the gland. Stigma depressed. Follicles smooth: seeds comose. — Slender, suifruticose 

 climbers ; mnheh few-Jlowered; corolla-lobes usually puherulous mthin. 



Sect. 1. Etjmetastelma. — Crown inserted into the corolla. 



1. KI. parviflorum, U. Br. Glabrescent; leaves ovate-oblong or oblong, mucronate- 

 blunt ; umbels sessile ; corolla-lobes linear-oblong, exceeding the crown, twice as long as 

 the tube : crown-leaflets linear, twice as long as the subsessile column. — ^Cynanchum, Sw. — 

 Leaves 8"'-16"', white corolla 1'" long.— Hab. Jamaica !, Fd., March, in hedges ; Antigua !, 

 Nichols. ; Trinidad {Sieb.) ; [Haiti to Venezuela ! and New Granada !]. 



2. M. albiflorum, Gr. {a. sp.). Branchlets and pedicels puherulous or glabrate; leaves 

 ovate-lanceolate or lanceolate, pointed-mucronate ; umbels subsessile or their peduncle 

 shorter than the petiole; corolla-lobes oblong-linear, twice as long as the tube and the 

 crown ; crown-leaflets linear, equalling the subsessile column. — Leaves 6"'-10"', petioles 

 l"'-2"', peduncles 1'" long (or none) ; pedicels l"'-2"', corolla 1"' long.— Hab. Jamaica !, 

 March; [S. Thomas!]. 



'^ 3. M. Schlechtendalii, Decs. Branchlets and pedicels puherulous or glabrate ; leaves 

 ovate-lanceolate, pointed-mucronate; umbels peduncled : peduncle equalling or exceeding J 

 the petiole ; corolla-lobes oblong-linear, twice as long as the tube and the crown : crown- 

 leaflets linear, equalling the stipitate column : column-stalk as long as the anthers. — 

 Leaves 6"'-12"', peduncles 4"'-6"', pedicels 2'", coroUa 1'" long.— Hab. Jamaica !, Pd. ; 

 [Caribbean Islands ! ; Mexico ! to Venezuela !]. 



4. M. Faralias, Decs. Glabrescent ; leaves ovate, cuspidate-mucrouate ; umbels ses- 

 sile ; corolla-lobes oblong-linear, twice as long as the tube, exceeding the crown j crown- 

 leaflets linear, equalling the long-stipitate column : column dilated above, stalk about thrice 

 as long as the antherSf^'Leme!, 8"'-16"', pedicels 2'", corolla 1'" long. — Hab. Antigua!, 

 Wullschl.; Trinidad!, Ch-riS. Martin, Guadeloupe!]. 



5. HI. suberosnxu, Gr. Puherulous or glabrate; leaves ovate-lanceolate, mucronulate- 

 poinfed; umbels peduncled or subsessile; corolla-lobes linear-oblong,. puherulous within at 

 the thickish margin, twice as long as the urceolate tube, exceeding the crown ; crown-leaflets 

 linear, exceeding the long-stijyitate column : column dilated above, stalk six times as long 

 as the anthers. — Orthosia, spec. Desc. in Hb. Hook. — Flowers twice as long as in all the pre- 

 ceding species. Leaves 1", peduncles l"'-3"', pedicels l"'-2"' long ; sepals ovate, half as 

 long as the ovoid corolla-tube ; corolla 2'" long : lobes one-third longer than the crown : 

 crown-leaflets flat, inserted between them, decurrent along the corolla-tube into the dUated 

 base of the column ; column slender, l-J'" long ; follicles linear-acuminate,' IJ" long — Hab. 

 Dominica!, Imr.; Trinidad!, Lockh., in dry gravelly soil; [Venezuela]. 



Sect. 2. Epicion. — Crown inserted below the anthers into the column. 



6. M. cubense, Decs. Glabrous ; leaves oval or oval-roundish, mucronate ; peduncles 

 short, 2-3-flowered; corolla-lohes ovate-oblong, pointed, glabrous within the induplicate 

 margin, thrice as long as the ovate tube, twice as long as the column ; crown-leaflets lan- 

 ceolfite, internally keeled, including the anthers, decurrent along the column into the keels 

 of the coroUa-tube ; column cylindrical, stalk thickish, four times as long as the anthers. — • 

 Leaves 12"'-6"', peduncles 2"', pedicels 2"', flowers 2J'" long ; sepals ovate, blunt, half as 

 long as the corolla-tube. — ^Hab. Bahamas !, Swains. ; [Cuba]. 



2. AMPHISTELMA, Gr. 

 (Vincetoxicum, sp. american., Decs) 



Calyx 5-leaved. Corolla small, rotate, 5-partite, slightly contorted : crown 5-leaved or 



