370 
ASCLEPIADACEAE. (MILKWEED FAMILY.) 
vhta, Ell .) Dry hills and sandy fields, Massachusetts to Wisconsin, 
common southward. July-Sept. —Flowers greenish, when expand¬ 
ed about the length of the pedicel. Leaves singularly variable in 
form. 
2. A. longilolia, Ell. (Long-leaved Green Milkweed.) 
Minutely hoary ; stem slender, upright; leaves elongated-linear, 
roughish ; umbels peduncled , open, many-flowered ; divisions of the 
corolla ovate-oblong, several times shorter than the pedicels; hoods 
of the crown short and rounded , raised on the tube of filaments; pods 
smooth. Moist places, Ohio and southward. June, July. — Leaves 
5 ; - /' long, wide. Flowers half as large as in the last, tinged 
with yellowish and purplish. 
3. ENSEENIA, Nutt. Enslenia. 
Calyx 5-parted. Corolla 5-parted ; the divisions erect, ovate- 
lanceolate. Crown of 5 free membranaceous leaflets, which are 
truncate or obscurely lobed at the apex where they bear a pair of 
flexuous awns united at their base. Anthers nearly as in Ascle- 
pias : pollen-masses oblong, obtuse at both ends, fixed below the 
apex to the descending processes of the gland. Pods oblong-lan¬ 
ceolate, smooth. Seeds with a silky tuft, as in Asclepias. — A 
perennial twining herb, smooth, with opposite heart-ovate and 
pointed long-petioled leaves, and small whitish flowers in raceme¬ 
like clusters on slender axillary peduncles. (Dedicated to A. Ens - 
k*’ an Austrian botanist who collected in the Southern United 
States early in this century.) 
1. E. :i Ibid a, Nutt. — River-banks, Ohio and southward, com¬ 
mon. July - Sept. — Climbing 8° -12° high : leaves 3' - 5' wide. 
4. OONOEOBUS, Michx. Gonolobus. 
Calyx 5-parted. Corolla 5-parted, wheel-shaped, sometimes 
reflexed-spreading; the lobes convolute in the bud. Crown a small 
and fleshy wavy-lobed ring in the throat of the corolla. Anthers 
horizontal, partly hidden under the flattened stigma, opening 
transversely. Pollen-masses 5 pairs, horizontal. Pods turgid, 
more or less ribbed, and armed with soft warty processes. Seeds 
ith a silky tuft. Twining herbaceous or shrubby plants, with 
opposite heart-shaped leaves, usually hairy, and racemed or cor- 
ymbed greenish or dingy purple flowers, on peduncles rising from 
between the petioles. (Name composed of ya>vo S , an angle , and 
Xo0o' f , apod, from the ribbed follicles.) 
