400 COMPOSITiE. Pedis. 



Califonua, Coulter, No. 330. Arizona, Dr. Palmer. Involucre 2 or 3 lines long ; the whole 

 head 4 or 5 lines long, rather few-tlowered. 



3. P. filipes, Gray, 1. c. Annual, slender and diffuse, glabrous : leaves narrowly 

 linear (an inch or more long, seldom a line wide), sparingly bristle-fringed at base : 

 peduncles capillary, one or two inches long : scales of the involucre 5, rather broadly 

 linear, obtuse : rays exserted, oblong : disk-flowers about 5 : akenes slender : pappus 

 of about 2 (1 to 3) slender awns which are gi-adually slightly dilated at base and 

 minutely scabrous towards the apex, in the disk sometimes a minute crown with a 

 solitary awn. 



California, Coulter, Ko. 329. New Mexico, TJmrher, Bigclow, Henry. Janos, Chihuahua, 

 Schott. Involucre narrow, 2 to 2i lines long. Only Coulter's plant shows the short crown of 

 the disk-pappus. There is no trace of it, and the awns are 2 or 3, in the other specimens, which 

 are from a district farther east than that probably traversed by Coulter. Bentham thinks it 

 likely to be P. Taliscana, Hook. & Am. ; but it does not accord with the character of that 

 species. Probably it has not been collected within California. 



Tribe YII. AXTHEMIDE^. 



Distinguished from Helenioideee by the drier more scariously margined or tipped 

 and imbricated scales of the involucre ; from Asteroidece b}^ the same and by the 

 truncate tips of the style in the perfect flowers, never continued into an appendage ; 

 the pappus none or a mere crown. Belonging mainly to the Old World, very few 

 in Western Xorth America, except of Artemisia. 



89. ACHILLEA, Linn. Yakiiow. 



Head many-flowered, with few or several pistillate rays ; all the flowers fertile. 

 Scales of the narrow involucre imbricated in few series, appressed, mostly with 

 scarious margins. Receptacle from flattish to conical, with thin chafl; subtending 

 the flowers. Eays mostly short or broad. Akenes oblong or obovate, obcompressed, 

 surrounded by a narrow and cartilaginous margin, destitute of pappus. — Perennial 

 herbs (numerous in the Old World, but very few in the iN'ew), rather strong-scented ; 

 with alternate either serrate or pinnately dissected leaves, and small corymbose 

 heads of yelloAv or white or sometimes rose-colored flowers. 



1. A. Millefolium, Linn. A foot or two high, or lower on mountains, villous- 

 woolly at least when young : leaves lanceolate or linear in general outline, twice 

 pinnately parted into fine linear acute and 3 - 5-cleft lobes : heads small, crowded 

 in a compound corymb-like cyme : rays 4 or 5, obovate, white, rarely rose-color 

 (occasionally becoming tubular) : akenes slightly margined. 



Common in the Sierra Nevada up to 11,000 feet, extending through all the moimtains north- 

 ward and eastward ; not rare in the western part of the State at the level of the sea ; there 

 perhaps introduced from the Old World ; but clearly indigenous all round the northern hemi- 

 sphere. 



90. ANTHEMIS, Linn. Chamomile. 

 Head many-flowered, Avith numerous pistillate or sometimes neutral rays ; the 

 disk-flowers fertile. Involucre hemispherical ; the scales very numerous, imbricated 

 and appressed, scarious-margined, with a more rigid centre. Eeceptacle from con- 

 vex to oblong-conical, chaffy with slender or thin scales or awns, subtending the 

 flowers, at least the central ones. Eays commonly conspicuous. Akenes obovcjid 

 or oblong, 4-5-angled, 8-10-ribbed, or many-striate, truncate at the apex. Pappus 



