74 FLORA OF THE UPPER SUSQUEHANNA. 



ings; often found escaped along roadsides. Leaves evergreen; 



flowers purple. 



APOCYNUM L. 

 A. androsasmifolium L. Dog-bane. Milkweed. Very common 



in thickets, fence-rows and open woods. Plant one to two feet 



high, spreading; flowers numerous, bell-shaped, white, striped 



with purple inside. June. July. 

 A. Cannabinum L. Indian Hemp. Common on gravelly or 



sandy shores. Restricted to the banks of the rivers and larger 



streams. Flowers small, greenish-white. July. Aug. 



ASCLEPIADACE/E. 



ASCLEPIAS L. 



A. tuberosa L. Bltterfly-weed. Pleurisy- root. Orange 

 Milkweed. Common in the western part of our range. Pond 

 Brook; rare, Clute. Not reported north, east or south of 

 Broome county. Found in dry fields. Stems leafy, about two 

 feet high; umbels numerous, terminal, forming a large corymb 

 of bright, orange-yellow flowers. A handsome species when in 

 bloom, easily distinguished at a distance from the goldenrods, 

 with which it growls. Aug. 



A. incarnata L. Swamp Milkweed. Common in low grounds. 

 Stems tall, bearing at top numerous erect umbels of small, rose- 

 purple flowers. July. 



A. Syriaca L. Common Milkweed. Silk-weed. Very common 

 and well known in dry fields, and along roadsides. Stems tall, 

 stout; leaves oblong; flowers in large umbels, greenish or pur- 

 plish-white, on stout peduncles from the axils of a few of the 

 upper leaves , juice abundant, milky. The young shoots are ex- 

 tensively used as a pot-herb. July. {A. Cornu // Decaisne. ) 



A. exaltata (L.) Muhl. Poke Milkweed. Common in open 

 woodlands and thickets, oftenest in moist soil. Much resembles 

 the preceding. July. {A. phytolaccoides V\xr€ti.) 



A. quadrifolia Jacq. Four-leaved Milkweed. Common in dry 

 open woods. Stems one to two feet long; leaves few, mostly in 

 whorls of four; umbels few-flowered; flowers tinged with pink, 

 slightly fragrant. June. 



