ElJPATORIUM. 



ADDITIONS. 



517 



Vol. I., p. 327 ; next to Eupatorium leucolepis, add : 



2 (a). Eupatorium hyssopifolium, Linn. Hyssop-leaved Hempweed. 



Stem minutely pubescent, loosely croymbose at the summit; leaves linear, opposite or 

 verticillate, and often fascicled in the axils, the uppermost alternate, minutely pubescent, 

 dotted on both sides, 3-nerved ; heads 5-flowered ; scales of the involucre 10, linear-oblong, 

 obtuse, shorter than the flowers, very pubescent, glandular ; achenia naked, usually glandular. 

 — Linn. sp. 2. p. 836 ; Willd. sp. 3. p. 1749 ; DC. prodr. 5. p. Ill (chiefly) ; Torr. $ 

 Gr. fl. 2. p. 84. E. linearifolium, Walt. fl. Car. p. 199 ; Michx. fl. 2. p. 84 ; DC. I. c. 



About 2 feet high ; the stem simple or branched, very leafy, erect and rigid. Leaves 

 about \\ inch long, and usually not more than 2 lines wide, of a thickish texture, rather 

 obtuse ; the lower ones somewhat lanceolate. Corymb often fastigiate ; the heads numerous, 

 small. Flowers white. 



Dry sterile soils, Queens county, Long Island (Mr. O. Willis). Fl. August - September. 

 A common species in the Southern States, and in New-Jersey. 



2 (b). Eupatorium album, Linn. White-headed Hempweed. 



Stem pubescent, corymbose at the summit; leaves opposite, sessile, broadly lanceolate, 

 coarsely serrate-toothed, veiny, dotted, more or less pubescent ; heads 5-flowered, glomerate ; 

 scales of the involucre 10 - 14, closely imbricated, narrowly lanceolate, acuminate, white 

 and scarious above, mostly longer than the flowers, the exterior dotted with resinous globules 

 when old ; achenia glandular. — Linn. mant. p. Ill ; Willd. sp. 3. p. 1752 ; Pursh, fl. 2. 

 p. 513 ; Ell. sk. 2. p. 296 ; DC. prodr. 5. p. 178 ; Torr. Gr. Jl. N. Am. 2. p. 86. E. 

 glandulosum, Michx. Jl. 2. p. 98. 



Stem about 2 feet high, rather stout, erect, sometimes almost villous. Leaves varying 

 from narrowly to broadly lanceolate, about 2 inches long, roughish, reticulately veined under- 

 neath. Involucre, corolla and achenia sprinkled with resinous globules when old. Flowers 

 white. Style either exserted or included. 



Sandy fields, Queens county, Long Island (Mr. O. Willis). Fl. August - September. 

 This, also, is a common plant in the sandy pine districts of New Jersey. 



Vol. I., p. 329 ; after Eupatorium sessilifolium, add : 

 5(d). Eupatorium resinosum, Torr. Resinous Hempweed. 



Stem minutely and softly pubescent, corymbose at the summit ; leaves opposite, closely 

 sessile or partly clasping at the base, linear-lanceolate, attenuated above, evenly serrate, 

 one-nerved, pinnately veined, nearly smooth above, velvety-canescent underneath, dotted with 

 resinous globules on both sides ; heads glomerate, 9 - 15-flowered ; scales of the involucre 

 oblong, obtuse, tomentose-canescent and glandular ; achenia minutely roughened with resinous 

 dots. — Torr. in DC. prodr. 5. p. 176 ; Torr. Gr. Jl. N. Am. 2. p. 68. 



