496 ASCLEPIADACEAE 
nal or axillary clusters; calyx 5-parted, the sepals turned back; 
corolla bell-shaped, urn-shaped or wheel-shaped. Between the co- 
rolla and the stamens is a 5-lobed crown attached either to the 
corolla or to the stamens. Stamens 5, the anthers in close con- 
nection with the summit of the pistil. The pollen grains cohere 
in masses. Ovary of two long pods. 
Crown of 5 hooded bodies, each with an incurved horn. Leaves 
opposite" o> 1. Ps. ae ae yiecan: Pee all, oe tae ee 
Crown without the incurved horns, leaves alternate. 
Erect plants. Wa.7. -o2 ee hy Ho Oe, i ee 
Wvaahing vine 4) 1.32 ese ce ee oe Cynanchum 
1. ASCLEPIAS 
Our species have opposite, whorled or scattered leaves, a milky juice, 
and small flowers in terminal or axillary umbels. Crown of 5 hood-like 
bodies each bearing an incurved horn. 
Stem reclining’ evs. 26 ‘efvs) te) of tel fe) (0) ce) ed ates el wis) ea eo Ee 
Stem erect. 
Leaves scattered. 
Flowers orange . ©. 0) fe se iol ateh ) wet opal emiaa, Be te eee 
Leaves opposite, not whorled. 
Flowers bright red or deep purple. 
Leaves narrow lance-shaped . . - A. lanceolata 
Leaves egg-shaped, the apex narrow. tapering | , . A, rubra 
Leaves egg-shaped with blunt taper... . A. purpurascens 
Flowers pink or light purple. 
Plant not hairy ei Vey ctelayl o~ | ot eae) yee eee mEnrne 
Plant downy or hairy < -& as Se) ES ee ice 
Flowers greenish-purple. 
Leaves blunt at each end. 
Plant downy (5 << =~s.0 6 « is © eps jee eelomecnemrene 
Plant notiidowny ©. << < 5 «= «6 ie sam Ogee 
Leaves tapering at each end << . .« « . © so «= sAdasexaiore 
Flowers white or partly purplish . a) df tele te A. variegata 
Leaves, at least a part of them, in a whorl of + pe hath ce ee aa quadrifolia 
Leaves in whorls of SiO 7 Mba: hee al ce «et 6 Ae Wertecilaia 
1. A. tuberosa, L. (Fig. 3, pl. 124.) Burrerrty WEED. PutEURISY 
Root. Stems rather stout, 1 to 2 ft. high, hairy, rough, bearing at the 
summit a number of umbels of orange-colored flowers. Leaves linear to 
lance-shaped, attached directly to the stem or by a short leaf-stalk. Pods 
erect on pedicels which first dip downward then curve upward. Dry 
fields. June-Sept. 
2. A. decumbens, L. DecumBent BUTTERFLY-WEED. Plant hairy; 
stems decumbent; leaves oblong or elliptic. Flowers dark orange, Dry 
fields, Conn., not common in our area. June-Aug. 
3. A. lanceolata, Walt. (Fig. 5, pl. 123.) (A. paupercula, Michx.) 
Stem slender, few if any branches, 2 to 4 ft. high, smooth, without hairs, 
as are the leaves. Leaves opposite, 4 to 10 in. long, linear or narrowly 
lance-shaped, rough on the edges, tapering at each end, but broadest to- 
ward the base, generally on very short leaf-stalks. Flowers in terminal] 
umbels, one or more, each with from 5 to 12 flowers; corolla segments 
red, hoods deep orange. Pod erect, about 4 in. long. Wet places, mostly 
near the coast, southern part of our area, June-Aug. 
