594 Order 97.— ASCLEPIADACE^E. 



lateral^ shorter than tho lvs. with few large flowers ; petals ovate, acute, reflcxed, 

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

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



3. ACERATES, Ell. (Gr. a, privative, nepdg, bom; the crown being 

 destitute of this process.) Calyx 5-partccl ; corolla 5-parted, reflcxed ; 

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

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

 otherwise as in Asclcpias. — 2£ 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 closo veinlets combined at edge into a marginal vein; umbels 

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

 pedicels; crown segm. oblong, erect, adnato to tho anthers. — In gravelly soils, 

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

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

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

 from "W. Ga. with tho leaves all nearly orbicular ! (A. obovata Ell ?) 



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

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

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

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

 clepias lanuginosa Nutt. ?) 



3 A. longifolia Ell. Scabrous-puberulent ; st. ascending, simple; lvs. alternate, 

 numerous, linear and lance-linear, subsessile, acute- ; umbels half as long as tho 

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

 Btipitate, shorter than the aniheridium. — Mich, to la., and Miss., in meadows and 

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

 3 — 5". Flowers very numerous ia each umbel, green, peduncle and pedicels 

 about 1' long. July, Aug. 



4. AKAN'THERIX, Nutt. (Gr. a privative, avOtqt^ a beard ; of 

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



f>etals broadly ovate, imbricated, reflcxed spreading ; crown of 5 hol- 

 ow, closed, horn-like, segments incurved, free from the anthers, 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 

 Asclcpias. — if Herbs erect, with oblong, narrow, opposite lvs. and 

 terminal paniculate umbels. Petals leaf-like, green. 



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

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

 paniclcd along the nakedish summit, 7 to 12-flowered; ;>e/afe oval, with a short 

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

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

 Sts. about 2f high. Lvs. 18 to £0" long, 4 to 9" wide. Petals 5" loug. Jn. 

 (A. viridis Nutt. Asclepias connivens Baldw.) 



2 A. paiiiculatus Nutt. St. stout, angular, contort d, assurgent, hirsute; lvs. 

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

 paniculate at tho 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. ] 2 to IS' high, very leafy. Lvs. 2 to 

 3' long. Petals G to 8" long. (Accrates paniculata Decaisnc. Asclepias viridis 

 Walt.) 



5. FODOSTIG'MA, Ell. (Cr. iruvc, Troddr, foot, ariyfia, stigma; 

 from the character.) Corolla segments 5, erect, oblong, much exceed- 

 ing the calyx; crown pedicellate, segment* 5, without horns, short, 



