Okdeis 91.— ASCLEPIADACEiE. 595 



concave, split on the inner side, apex reflexed ; pollinia suspended by 

 the attenuated apex, compressed ; stigma depressed, 6-angled ; follicles 

 2, long, slender, smooth. — If St. low, simple. Lvs. opposite. Umbels 

 extraraxillary, few-flowered. 



P. pub^soens Ell. In wet or moist grounds, S. Car., Ga., Fla. (Macon, Prof. 

 Loomis), Tallahassee (Mottauer) and Apalachicola ! Plant of singular appearance, 

 8 to 14' high, slender, pubescent. Lvs. linear-oblong, rarely linear-ovate, ob- 

 tusish, sessile, erect, 1 to 18" long. Umbels 3 to 5, alternate, 3 to 5-flowered, 

 rather shorter than the leaves. Els. cylindrio bell-shaped, yellowish green, 4" 

 long, erect, the crown conspicuously pediceled. May, Jn. 



6. SENTE''RA, Eeich. Calyx of 6 lanceolate, acute sepals ; corolla 

 subrotate, 5-partcd, acute, glabrous ; crown segm. 5, erect, flattish, re- 

 tuse, adnate to the base of the sessile anthers ; pollinia ovoid, fixed by 

 the apex, pendulous ; stigma bifid ; follicles 2, smooth ; seeds comous. 

 — 2f Slender, twining, with linear, fleshy lvs., few-flowcrod umbels. 

 (Lyonia, Ell. nee Nutt.) 



S. maritima Decn. In salt marshes, S. Car. to Fla., twining around tho rushes, 

 &c. Whole plant very smooth. Lvs. opposite, sessile, chinneied, 1' long. Um- 

 bels between the leaves, 1 to 10-flowered. Sep. oiliolate, erect. Petals acute, 

 greenish, twice longer than the white crown. Follicles very slender. Jn. — Oct. 

 (S. maritima Ell.) 



7. ENSLE^NIA, Nutt. (In memory of Mr. Aloysius Unslen, who 

 collected many plants in the Southern States.) Calyx small, 5-parted ; 

 cor. 5-parted, segments erect ; corona 5-leaved, leaflets membranaceous, 

 free, truncate, each terminated by 2 filiform, flexuous lobes ; pollinia 

 oblong, obtuse at base and apex, pendulous ; stig. 6-angled, conical ; 

 follicles cylindraceous, smooth. — 2J! A twining herb, with opposite, cor- 

 date-ovate, acuminate lvs.' Ped. racemous-umbellate, many-flowered. 

 Fis. white. . / 



E. Slbida Nutt. — W. and S. States, common. Sts. slender, with an alternate, 

 pubescent line. Lvs. thin, glabrous, with rounded, auriculate lobes at base, 2 to 

 3' long and wide, ending in a slender point, margins entire. Ped. axillary, as 

 long as the petioles. Pis. ochrolencous, sweet-scented, 2" long. Jl., Aug. 



8. GONOL'OBUS, Mx. (Gr. yaivo?, angle, Xopog, pod ; the fruit of 

 some species is angular.) Calj-x 5-parted, spreading; corolla subro- 

 tate, 5-parted, convolute in bud ; crown a small, fleshy, undulate-lobed 

 ring, attached to the throat of the corolla ; anthers opening transversely 

 beneath the stigma ; pollinia 5 pairs, horizontal ; follicles turgid, seeds 

 comous. — 2£ More or less shrubby, twining or prostrate. Lvs. cordate, 

 hairy, opposite. Umbels extra-axillary. 



1 G. inacroph;^llus Mx. St. tomentous-pubescent and with soft, scattered 

 hairs ; lvs. broad, ovate or oval, cordate, acuminate, pubescent beneath, at length 

 glabrous above ; ped. shorter than the petioles, 2 to 5-flowered, with linear bracts 

 at summit; petals linear or linear-oblong ohtuse, (6" long), smooth above, min- 

 utely puberulent beneath ; follicles cosiate-angled. — Thickets along streams, Penn. 

 to Ky. and Ga. Tine trailing or climbing 3 to 5f. Lvs. thin, 3 to 6' by 2 to 4', 

 the lobes at base rounded and often nearly or quite closed, with a short acumina- 

 tion at apex. Pis. dark purple. Petals 5 to T" by 1". Jn., Jl. (G. dis- 

 color, B. M.) 

 /3. LEVIS. Plant nearly smooth, cor. segm. smooth both sides. — South. (G. 

 levis Ms.) 

 2 G. Mrstitus Mx. St. hirsute-pubescent ; lvs. broad-ovate, acuminate, cordate, 

 minutely pubescent both sides ; ped. shorter than the petioles, few-flowered, with 



