228 COMPOSITE. (COMPOSITE FAMILY.) 



crowded in a narrow and clustered leafy panicle. River-banks, Ohio to 

 Illinois, and northward. Aug. 



3. Receptacle hairy : flowers all fertile, the marginal ones pistillate. 

 7. A. ABsfxTHiUM. L. (COMMON WORMWOOD.) Rather shrubby, silky- 

 hoary ; leaves 2- 3-pinnately parted ; the lobes lanceolate ; heads panicled, nod- 

 ding. Road-sides, sparingly escaped from gardens. (Adv from Eu.) 



See Arldfnd.' 



58. G1VAPHAL.IUM, L. CUDWEED. 



Heads many-flowered; the flowers all tubular; the outer pistillate and very 

 slender, the central perfect. Scales of the involucre dry and scarious, vhite or 

 colored, imbricated in several rows. Receptacle flat, naked. Pappus a single 

 row of capillary rough bristles. Woolly herbs, with sessile or decurrent leaves, 

 and clustered or corymbed heads. Corolla whitish or yellowish. (Name from 

 yvd(ba\ov, a lock of wool, in allusion to the floccose down of the leaves.) 



* Achenia nearly terete: pistillate flowers occupying several roics. 



1. O. decurrens, Ives. (EVERLASTING.) Stem stout, erect (2 high), 

 branched at the top, clammy-pubescent, white-woolly on the branches, bearing 

 numerous heads in dense corymbed clusters ; leaves linear-lanceolate, partly clasping, 

 decurrent; scales of the (yellowish-white) involucre oval, acutish. 1J. Hill- 

 sides, New Jersey and Penn. to Maine and northward. Aug. - Sept. 



2. O. polyceplialum, Michx. (COMMON EVERLASTING.) Stem 

 erect, woolly ; leaves lanceolate, tapering at the base, with undulate margins, not 

 decurrent, smoothish above ; heads clustered at the summit of the panidtxl-coryinbose 

 branches, ovate-conical before expansion, then obovate ; scales of the (whitish) 

 involucre ovate and oblong, rather obtuse ; perfect flowers few. (D Old fields 

 and woods ; common. Plant fragrant, l-2 high. 



3. O. llliginosiiin, L. (Low CUDWEED.) Diffusely branched, woolly 

 all over (3' -6' high) ; leaves lanceolate or linear, not decurrent; heads (small) 

 in terminal sessile capitate clusters subtended by leaves ; scales of the involucre ob- 

 long. (I) Low grounds, and ditches by the road-side ; introduced ? (Eu.) 



4. O. purpureum, L. (PURPLISH CUDWEED.) Stem simple, or 

 branched from the base, ascending (6' -20' high), woolly ; leaves oblong-spatu- 

 late, mostly obtuse, not decurrent, green above, very white with close wool un- 

 derneath ; heads in sessile clusters in the axils of the upper leaves, and spiked at iht> 

 wand-like summit of the stem ; scales of tbe involucre lance-oblong, tawny-white, 

 the inner often marked with purple. Sandy or gravelly soil, coast of Maine to 

 Virginia, and southward. 



# # Achenia flatfish : pistillate flowers in a single marginal row. 



5. O. Sllpinum, Villars. (MOUNTAIN CUDWEED.) Dwarf and tufted ; 

 leaves linear, woolly ; heads solitary or few and spiked on the slender simple 

 flowering stems ; scales of the involucre brown, lanceolate, acute. 1J. Alpine 

 summit of Mount Washington, New Hampshire : rare. (Eu.) 



