Erect or decumbent perennial herbs, similar to Asclepias, with alternate or opposite entire leaves, and rather large flowers in terminal solitary or corymbed umbels. Sepals lanceolate. Corolla rotate, its segments spreading. Hoods oblong, inserted over the whole of the very short corona-column, curved upward, obtuse, crested within, at least in the upper part, slightly longer than the anther; at the sinuses between the hoods a small lobe or appendage, alternate with the anther-wings, simulating an inner crown. Anthers tipped with a scarious membrane, their wings horny, narrowed below, sometimes angled above the middle. Pollen-masses pendulous, pyriform, longer than their caudicles. Follicles ovoid or oblong, acuminate, with or without soft spinose processes, erect or ascending on the decurved or twice bent fruiting pedicels. Seeds comose. [Greek, gift of Aesculapius.]

Five or six species, natives of the southern United States and Mexico. Type species: Asclepiodora viridis (Walt.) A. Gray.

Glabrous or nearly so; leaves oblong to ovate-lanceolate; umbels corymbose.

1. A. viridis.

Stem rough-puberulent; leaves lanceolate or linear, acuminate; umbels solitary.

2. A. decumbens.

1. Asclepiodora Viridis (Walt.) A. Gray. Oblong-Leaved Milkweed

Fig. 3407

Asclepias viridis Walt. Fl. Car. 107. 1788.

Asclepiodora viridis A. Gray, Proc. Am. Acad. 12: 66. 1876.

Stem erect, puberulent above, simple, l°- 2° high. Leaves oblong to ovate-lanceolate, rather thin, obtuse and mucronulate or acute at the apex, narrowed or rounded at the base, short-petioled, 2 1/2'- 5' long, 1/2'-1 1/2' wide; umbels 2-4, or sometimes solitary; peduncles 1 1/2'-2' long; pedicels sleader, about 1/2' long grolla greenish, its segments, when expa , oblong, obtuse or acute, 4"- 6" long, 2- a.mes as long as the purplish or violet entire-margined hoods; anther-wings narrow, scarcely angled above; fruiting pedicels twice bent; follicles ascending, puberulent, 2'-3' long, sometimes with soft spinose projections.

In dry soil, Illinois to Kansas, Texas, South Carolina and Florida. May-July.

1 Asclepiodora Viridis Walt A Gray Oblong Leaved M 781 Asclepiodora Viridis Walt A Gray Oblong Leaved M 79

2. Asclepiodora Decumbens (Nutt.) A. Gray. Decumbent Milkweed

Fig. 3408

Asanthrix decumbens Nutt. Trans. Am. Phil.

Soc. (II.) 5: 202. 1833-37. Ascle dora decumbens A. Gray, Proc. Am.

Acad. 12: 66. 1876.

Stems decumbent or ascending, rough-puberulent, 10'-2° long. Leaves firm, linear to beaceolate, glabrous above, puberulent on the maeins beneath, acuminate at the apex, narrowed at the base, 3'- 7' long, 2"-8" wig umbel solitary, many-flowered; pe-dune 1'-5' long; pedicels stout, 1/2'-1' long; corfca depressed-globose in the bud, green-ish,.has segments, when expanded, ovate or broadly oval, longer than the hoods; hoods purl ;, obtusely 3-lobed on the ventral malns, about 3" long, their tips incurved; anthor-wings broad, angled above; follicles nearerect on the recurved fruited pedicels .'-4' long, puberulent, at least when you with or without soft projections.

ry soil, Kansas to Texas and Mexico, we Utah and Arizona. April-June.