594 Obdee si.— ASCLEPIADACBA 



lateral, shorter than the Ivs. with few large flowers ; petals ovate, acute, refiezed, 

 half as long as pedicels ; hoods ovate, longer than the recurved horns.— Gardens! 

 Tall and elegant. Hs. scarlet, varying to white, f W. Ind. 



3. ACERA^TES, Ell. (Gr. d, privative, Kepdg, horn ; the crown being 

 destitute of this process.) Calyx 6-parted ; corolla 5-parted, reflexed ; 

 crown segments 5, erect, adnate to the anthers and destitute of either 

 horns or scales ; pollinia 5 pairs, suspended by a thread-like beak ; 

 otherwise as in Asclepias. — 2f Lvs. opposite or alternate. Umbels 

 lateral. 



1 A. viridiflora Ell. Branched at base, stout, ascending, pubescent-hoary ; lvs. 

 opposite, oval, obtuse, mucronate, petiolate, thick, varying to oblong-ovate or 

 oven lanceolate, with close veinlets combined at edge into a marginal vein; umbels 

 nearly sessile, small, dense-flowered ; petals ovate, reflexed, nearly as long as the 

 pedicels ; crown segm. oblong, erect, adnate to the anthers. — In gravelly soils. 

 Can. to Ga. and Ark. Sts. about 2f high. Lvs. exceedingly variable, 2 to 4 to 

 G' long, wide in all proportions. Fls. small, green, inelegant, in 2 to 5 umbels. 

 Ped. 1 to 3" long. Jl. (Asclepias lanceolata Ives.) — Prof. Pond sends specimens 

 from TV. Ga. with the leaves all nearly orbicular ! (A. obovata Ell ?) 



2 A. monooephala Lapham. Low, stout, hairy; lvs. lanceolate, subsessile; 

 mnbel solitary, terminal on the naked summit of the stem, with numerous greenish 

 flowers; crown sessile, the obtuse concave hoods erect-spreading, as long as the 

 antheridium. — Prairies, Wise. (Mr. A. H. Watson). Plant near If high. (As- 

 clepias lanuginosa Nutt. ?) 



3 A. longifolia EU. Scabrous-puberulent ; st. ascending, simple ; hs. alternate, 

 numerous, linear and lance-linear, subsessile, acute ; mnbels half as long as the 

 leaves, numerous, many-flowered, pubescent, axillary, pedunculate ; crown-hoods 

 stipitate, shorter than the aniheridiwm. — Mich, to la., and Miss., in meadows and 

 prairies. Stem stout, 2 — 3f high. . Leaves 3 — 5' (including the 1 — 3'' petiole) by 

 3 — 5". Plowers very numerous in each umbel, green, peduncle and pedioefe 

 about 1' long. July, Aug. 



4. ANAW'THERIX, Nutt. (Gr. a privatfve, avdiQC^ a beard; of 

 similar import with Acerates.) Calyx short, 5-parted ; corolla 5-parted, 

 petals broadly -ovate, imbricated, roflexcd-spreading ; crown of 5 hol- 

 low, closed, horn-like, segments incurved, free from the anthere, double- 

 margined and furnished with a crest-like scale along the interior surface; 

 pollinia 5 pairs, suspended by a thread-like beak. Otherwise as in 

 Asclepias. — If Herbs erect, with oblong, narrow, opposite lvs. and 

 terminal paniculate umbels. Petals leaf-like, grften. 



1 A. connivens Feay. St. half-shrubby, firm, terete, strict, puberulent; lvs. 

 oval or rather oblong, erect, subsessile, acute or obtuse ; ped. 1 to 4, somewhat 

 panicled along the nakedish summit, 1 to 12-flowered; petals oval, loith a shffrt 

 cusp ; crown segm. thrice longer than the anthers, incurved from a spreading base 

 or arcuate, connivent over the anthers. — E. Ga. in pine barrens, (Feay, Pond). 

 Sts. about 2f high. Lvs. 18 to 30" long, 4 to 9" wide. Petals 5" long. Jn. 

 (A. viridis Nutt. Asclepias connivens Baldw.) 



2 A. panioiilatus Nutt St stout, angula/r, coniorttd, assurgent, hirsute; lvs. 

 narrowly oblong, obtuse, mucronate, on short petioles, pubescent ; ped. 3 to 5, 

 paniculate at the leafy summit, 5 to 9-flowered ; petals ovate, erect-spreading; 

 crown segm. spreading, not longer than the anthers, 3 times shorter than the leaf- 

 like petals.— Ga. (Feay, Pond) to Ark. Sts. 12 to 18' high, very leafy. Lvs.^ 2 to 

 3' long. Petals C to 8" long. (Acerates paniculata Decaisne, Asclepias viridis 

 ■Walt.) 



5. PODOSTIG'MA, Ell. (Gr. rrovf, Tzodbg, foot, oriyiia, stigma; 

 from the character.) Corolla segsnents 6, erect, oblong, much exceed- 

 ing the calyx ; crown pedicellate, segments 5, without horns, short, 



