ORDER 97. ASCLEPIADACE^e. 595 



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

 the attenuated apex, compressed ; stigma depressed, 5*anglcd ; follicles 

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

 extra-axillary, few-flowered. 



P. pubeSCens Ell. In Xvet or moist grounds, S. Car., Ga., Fla. (Macon, Prof. 

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

 8 to 14' high, slender, pubescent. Lvs. linearoblong, 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. Fls. cylindric bell-shaped, yellowish green, 4" 

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



6. SENTE^RA, Reich. Calyx of 5 lanceolate, acute sepals \ corolla 

 subrotate, 5-parted, 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 Ivs., few-flowered umbels. 

 (Lyonia, Ell. nee Nutt.) 



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

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

 bels between the leaves, 7 to 10-flowered. Sep. ciliolate, erect. Petals acute, 

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

 (S. maritima Ell.) 



7. ENSLE'NIA, Nutt. (In memory of Mr. Aloysius Enslen, who 

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

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

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

 oblong, obtuse at base and apex, pendulous ; stig. 5-angled, conical ; 

 follicles cylindraceous, smooth. If A twining herb, with opposite, cor- 

 date-ovate, acuminate Ivs. Ped. racemous-umbellate, many-flowered. 

 Fls. white. 



E. albida 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 tho petioles. Fls. ochroleucous, sweet-scented, 2" long. JL, Aug. 



8. GONOL'OBUS, MX. (Gr. y&vog, angle, Ao/36c, pod ; the fruit of 

 some species is angular.) Calyx 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 Gr. macroph^llus MX. St. tomentous-pubescent and with soft, scattered 

 hairs ; Ivs. 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 obtuse, (G'' long), smooth above, min- 

 utely puberulent beneath ; follicles costal-angled. Thickets along streams, Pemx 

 to Ky. and Ga. Vine 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. Fls. dark purple. Petals 5 to 7" by 1". Jn., JL (G. dis- 

 color, B. M.) 



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



lovis MX.) 



2 G. hirsutus MX. St. hirsute-pubeecent ; Ivs. broad-ovate, acuminate, cordate, 

 minutely pubescent both sides ; ped. shorter than the pet:olcf t fow-9owcred, with 



