WILD FLOWERS OF NEW YORK 289 



sixes, commonly in fours. The inflorescence consists of large, terminal, 

 loose, compound clusters of numerous flower heads, pinkish lavender to 

 purple in color; each head composed of tubular flowers only. Involucres 

 of individual heads cylindric, with pinkish purple, oblong, blunt bracts, 

 overlapping in four or five series. 



In moist soil, woods and low thickets, especially common in wet places 

 along streams, New Brunswick to Manitoba, south to Florida and Texas. 

 Flowering in August and September. 



The Spotted Joe-pye Weed (Eupatorium maculatum Lin- 

 naeus) is similar to E. purpureum, but the stem is spotted with 

 purple and usually rough or pubescent; the flowers usually pinkish purple 

 in color. 



Hyssop-leaved Thoroughwort 



Etipatorium hyssopifolium Linnaeus 



Plate 22Qb 



Stems roughish-puberulent, rather bushy, I to 2 feet high, from a 

 perennial root, bearing opposite, linear leaves and densely corymbosely 

 branched above. Numerous smaller leaves fascicled in the axils of the 

 stem or on short, axillary branches; leaf blades entire, blunt at the apex, 

 narrowed at the base, one-half to 2 inches long, one-twelfth to one-sixth 

 of an inch wide, firm and usually with more or less revolute margins. Heads 

 white, arranged in a flat-topped panicle, each head about one-third of an 

 inch high with about five tubular flowers, surrounded by a campanulate 

 involucre, composed of linear-oblong, puberulent bracts imbricated in about 

 three series, the outer ones shorter. 



In dry fields, Massachusetts to Florida and Texas. Flowering in 

 August and September. 



Rough or Vervain Thoroughwort 



Eupatorium verbenaefolium Michaux 



Plate 22pa 



Stems erect, more or less branched at the summit, rough-pubescent, 

 slender, 2 to 7 feet high from a perennial root. Leaves opposite, rough- 



