78 
666. F. sambueifolia, Lam. Black Ash. 
Swamps from Grand Crossing, south and southeast; infrequent. 
April — May. (B.) 
APQC YN ACE-ZE . 
APOCYNTJM, Tourn. 
4-667. A. androssemifolium, L. Spreading Dogbane. 
Borders of woods, fence-rows and copses; common. June 25th — 
August 10th. 
Two forms occur: 
(a) Glabrous; common. 7'b^yiA/ f - 
(b) Tomentose, especially on the under side of the leaves; rare. 
668. A. cannabinum, L. Indian Hemp. 
Banks of streams, borders of woods, moist roadsides, etc. ; common. 
July — August. 
Polymorphous. The various forms can hardly be considered varie- - -ft ty 
ties. Specimens have been found in the Calumet Region that - ■ > 
were 5 feet high. Prostrate forms occur in dry places. U<J J 1 ^ 
ASCLEPIADACK*. 7 
ASCLEPI AS, L. Milkweed. 
669. A. tuberosa, L. Butterfly-weed. Pleurisy-root. Indian Posy. 
Sandy soil; frequent or common in the eastern portion of our dis- 
trict, especially southeast, in Lake County, Ind. August. 
Specimens sometimes attain a height of 8 feet ? and have deep 
orange-red flowers. * 
670. A. purpurascens, L. Purple Milkweed. 
Dry banks, borders of woods and copses; not common. June 15th 
i 
July. 
Chiefly from Riverside and Hyde Park southeast. 
This species often reaches a height of 4 to 5 feet. 
671. A. incarnata, L. Swamp Milkweed. < 4 * 
Swamps, wet banks and fields; common, or abundant south. July 
iit. 
672. A. incarnata, L., var. pulchra, Pers. 
With the type ; infrequent. June — July. (B. P.) 
673. A. cornu ti, Decaisne. Common Milkweed. Silk weed. 
Fields, bluffs and roadsides; common or abundant. July — August. 
It is said that silk fabric is successfully made from the long silky 
hairs of the seeds. € 
4 674. A. sullivantii, Engelm. Sullivant’s Milkweed. 
Moist or swampy places; frequent, especially southward. July. 
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