COMPOSITE FAMILY 26l 



upper sessile. Heads showy. Akenes top-shaped, ribbed, 

 with 5 to 12 thin pappus-scales. 



1. H. bigelovii Gray. Bigelow Sneezeweed. Nearly gla- 

 brous, branching and sparsely leafy above. Leaves green, 

 lanceolate, 4 to 10 in. long, y 2 in. or less wide, continued down 

 the stem as wings. Rays yellow, drooping over the reflexed 

 bracts, H to 34 in. long; disk brown, globose, ^ to ^ in. 

 across. Akenes hairy. — In meadows and along streams at 

 moderate altitudes. 



2. H. hoopesii Gray. White-woolly when young, branch- 

 ing and leafy to the top. Leaves pale, oblong, the lower 

 tapering to the base, entire, 2 to 6 or 10 in. long. Rays yel- 

 low, about 1 in. long, spreading; disk yellow, globose, Y\ to 

 1 in. across. Akenes silky. — Near timber-line only. 



33. ANTHEMIS. Camomile. 

 1. A. cotula L. Mayweed. A leafy annual, 6 in. to 2 ft. 

 high, nearly glabrous. Leaves alternate, dissected into 

 numerous linear lobes. Heads J^ in. across, long-peduncled, 

 the yellow disk and white rays showy. Akenes glabrous but 

 rough, without pappus. — An introduced weed in waste places. 



34. ACHILLAEA. Yarrow. Milfoil. 

 1. A. millefolium var. lanulosa Piper. Perennial from root- 

 stocks, not woody, the simple leafy stems 1 to 3 ft. high, 

 loosely gray-pubescent. Leaves alternate, finely cut into 

 many small lobes. Heads *4 m - high? m flat-topped terminal 

 clusters, with 4 to 6 white or pink rays; involucre of closely 

 overlapping scales. Akenes linear, without pappus. — Abun- 

 dant throughout the mountains. 



35. MATRICARIA. 

 1. M. suaveolens Buch. A glabrous leafy annual, 4 to 12 

 in. high. Leaves alternate, finely dissected. Heads short- 

 peduncled, with greenish disk and no rays. (M. discoidea 

 DC.) — May be expected as an introduced weed. 



36. ARTEMl'siA. Wormwood. 

 Herbs and shrubs, mostly bitter and aromatic, with alter- 

 nate leaves. Heads small, without rays, the tubular flowers 

 yellow or purplish, not showy. Akenes glabrous, without 

 pappus. 



Plant herbaceous, or hardly woody at the base. 



Leaves green and glabrous, linear, entire 1. A. dracunculoides. 



Leaves soft-hairy, parted into many narrow lobes... 2. A. norvegica. 



