ASCLEPIADACE.E. (mILKWEED FAMILY.) 3G7 



2. M. parviflorum, R. Brown. Herbaceous 1 stem very slender, pubes- 

 cent in lines ; leaves smooth, linear-lanceolate, falcate, acuminate, rounded at tiie 

 base, short-petioled, drooping ; umbels sessile or short-pcduncled, 4 - 6-flowered ; 

 sepals smootli, acute ; lobes of the corolla linear, incurved at the apex, very 

 pubescent within ; leaves of the crown inserted on the base of the sessile gynos- 

 tegium, linear, erect, exceeding the stigma. — South Florida. — Leaves 6'' -8'' 

 long. Corolla 1" long. 



3. M. Fraseri, Decaisne. Branches slender, pubescent in lines ; leaves 

 oval or round-ovate, mucronate ; umbels sessile; pedicels shoit, smooth; lobes 

 of the corolla ovate, acute, thickish, pubescent on the margins ; leaves of the 

 crown linear, as long as the corolla, longer than the gynostegium. — In Caro- 

 lina, Fraser. ( * ) 



5. SEUTERA, Reich. 



Calyx 5-partcd Corolla somewhat wheel-shaped, 5-parted, with narrow acute 

 smooth lobes. Crown sunple, deeply 5-parted, inserted on the base of tlie sessile 

 gynostegium ; the lobes ovate, flattened. Stigma conical, longer than the anthers. 

 Follicles smooth. Seeds comose — A slender partlj-^ shrubby twining vine, with 

 fleshy linear drooping leaves, and long-peduncled umbels of greenish flowers. 



1. S. maritima, Decaisne. (Lyonia, Ell) — Salt marshes, Florida to 

 North Carolina. July and Aug. — Stem shrubby at the base ; the branches 

 twining around rushes and saline grasses. Leaves 2' long. Peduncles com- 

 monly longer than the leaves, many-flowered. Lobes of the corolla lanceolate, 

 imbricated in the bud. Lobes of the crown obtuse, as long as the stigma. 



6. CYNOCTONUM, Meyer. 



Calyx 5-parted. Corolla wheel-shaped, 5-parted. Stamineal crown simple, 

 enclosing the base of the sessile gynostegium, 5-lobed or 5-crenate. Anthers 

 membranaceous at the apex. Stigma flattish. Follicles linear, spreading or 

 reflexed. Seeds comose. — Perennial or shrubby twining plants. Leaves 

 mostly cordate. Umbels lateral. 



1. C. '^ SCOparium. Stems much branched, pubescent in lines, shrubby at 

 the base ; leaves thin, linear, cuspidate, tapering into a petiole, smoothish ; um- 

 bels nearly sessile, few-flowered, shorter than the leaves ; calyx-lobes ovate, 

 obtuse, pubescent like the pedicels ; corolla smooth, the spreading lobes lanceo- 

 late, obtuse ; crown crenately 5-lobed, shorter than the gynostegium ; follicles 

 very slender, widely spreading ; seeds linear, wingless. (Cynanchum scoparium, 

 Nutt.) — Drj' rich soil, near the coast. West Florida to Key West. — Leaves 

 ^'-1' long. Flowers green, less than a line long. Follicles 1' long. 



7. SARCOSTEMMA, R. Brown. 



Calyx 5-parted. Corolla wheel-shaped, 5-parted. Crown double ; the exte- 

 rior forming a ring at the base of the corolla ; the interior longer, 5-leaved 

 Stigma pomted, notched. Follicles slender, smooth. Seeds comose. — Erect or 



