COMPOSITE. 455 



* * Herbaceous species, all perennial except n. 5. 



2. A. Norveg'iea, Fries, Novit. 1 ed. 56 (1817). Stems several, erect, 

 a few inches to more than a foot high, stoutish, loosely villous, or 

 glabrous: leaves mostly basal, bipinnately parted into linear-lanceolate 

 or broader acute lobes, the upper cauline reduced to trifid bracts: heads 

 large, in a naked panicle or loose raceme: bracts of the involucre 

 oblong, brownish : achenes oblong, 5-angled. — Alpine in the Sierra 

 Nevada, but rare. Wood's Peak, Brewer. 



3. A. pyciiocephala, DC. Prodr. vi. 99 (1837). Stout, erect, simple, 

 very leafy up to the dense close thyrsoid or virgate panicle, densely 

 silky-villous even to the involucre: leaves 1— 3-pinnately parted into few 

 and short linear or spatulate lobes: heads 2 lines broad, only the 

 marginal fl. fertile; style of the disk fl. undivided and tufted at apex: 

 achenes glabrous; pappus none. — Sandy hills and shores along the sea- 

 board. Aug. — Dec. 



4. A. dracuiiculoides, Pursh, Fl. ii. 742 (1814). Stems clustered, 

 ascending, 2—4 ft. high, virgately branched: herbage glabrous, pungent- 

 scented when bruised, but neither aromatic nor bitter: lowest leaves 

 3-cleft at summit, the others linear, entire: heads little more than a line 

 broad. — At Black Point, San Francisco, and in Alameda Co., thence 

 southward and eastward. Aug. — Nov. 



5. A. biennis, Willd. Phytogr. 11 (1794), and Sp. iii. 1842. Annual, 

 erect, virgate, 1 — 3 ft. high, leafy to the summit: herbage deep green, 

 glabrous and tasteless, nearly: leaves 1 — 2-pinnately parted into lanceo- 

 late or broadly linear laciuiate or toothed lobes, or the uppermost only 

 pinnatifld: heads small, in close glomerules on the spiciform short 

 branches and main stems: achenes with small epigynous disk and no 

 pappus. — Mostly in or near cultivated ground ; not very common. 

 Aug. — Oct. 



6. A. lieteropliylla, Nutt. Trans. Am. Phil. Soc. vii. .400 (1841). 

 Strictly erect, 3 — 5 ft. high, simple and leafy up to the short naked dense 

 panicle; herbage bitter and aromatic: leaves white beneath with cottony 

 tomentum, green and glabrate above, 2 — 4 in. long, lanceolate or broader, 

 acute, often laciniately toothed or cleft, as often entire, of firm texture: 

 heads very numerous, 2 lines high, seldom as broad. — Very common in 

 low rich land, along streams, and among the hills July— Oct. 



7. A. inooinpta, Nutt. 1. c. Rather slender but disposed to branch, 

 1 — 2 ft. high : thinnish leaves green and glabrous above, pale and slightly 

 tomentose beneath, once or twice pinuately parted into broadly or 



