338 COMPOSITE. Filago. 



Valleys in alluvial or gravelly soil, from Humboldt Co. and the Sacramento to San Luis Obispo. 

 The specimens distributed under No. 415 of Kellogg and Harford's collection, with shorter and 

 smaller leaves, have a very slender column to the receptacle, and less villosity. Bolander's from 

 Mendocino Co., otherwise similar, have a shorter and thicker column, and much villosity to 

 the receptacle. In none is the column so thick as represented on the plate above cited. 



33. FILAGO, Linn. 



Head discoid, the pistillate flowers with filiform corolla few or many in more than 

 one series on the obconical or short-columnar but flat-topped receptacle, each in the 

 axil of a concave or boat-shaped hyaline chaff or scale, or nearly enclosed in it ; the 

 perfect and fertile or rarely infertile flowers several in the centre, with tubular 4-5- 

 toothed corollas. Akenes oblong, almost terete, commonly glandular or roughish- 

 papillose. Pappus a series of rather copious capillary scabrous bristles, or commonly 

 none to the outer pistillate flowers. Mostly erect and low or slender floccose- 

 woolly annuals, with alternate entire leaves, and small heads in capitate lateral and 

 terminal clusters : natives of the Old World, one or two sparingly naturalized and 

 two indigenous in the New. 



1. F. Californica, Nutt. Erect, a span or two high, slender, often paniculately 

 branched : leaves linear or somewhat spatulate, about half an inch long : clusters of 

 ovoid and somewhat angled heads axillary and terminal : pistillate flowers 8 to 10 : 

 their scales broadly ovate and deeply boat-shaped, very woolly outside, almost en- 

 closing the akene, the hyaline tip broad and very obtuse : inner scales narrowly 

 oblong, nearly glabrous, very obtuse : akenes gland ular-roughish : pappus none to 

 the exterior flowers. F. Californica & F. parvula, Torr. & Gray. Gnaphalium (?) 

 filaginoides, Hook. & Am. Bot. Beech. 359. 



Open ground, common through the western part of the State, and evidently indigenous. Most 

 like the European F. arvcnsis. 



F. ARIZONIOA, Gray, in Proc. Am. Acad. viii. 652, the second native species, collected in Ari- 

 zona and Guadalupe Island, off Lower California, is a peculiar small species, with proliferous fili- 

 form naked branches, somewhat resembling F. spathulata, and is not unlikely to occur in the 

 southern part of the State. 



34. ANTENNABIA, Ga>rtn. 



Head discoid, dioecious, many-flowered ; the pistillate with filiform truncate 

 corollas shorter than the 2-cleft style ; staminate with tubular 5-lobed corollas and 

 style with undivided truncate apex. Involucre of imbricated scarious persistent 

 scales, at least their tips white or colored. Receptacle flat or convex, naked. 

 Akenes small, nearly terete or flattish, mostly glabrous. Pappus a single series of 

 capillary bristles ; those of the fertile flowers very slender, connate at base and so 

 falling from the akene in a body ; those of the sterile often crisped, mostly thick- 

 ened at the apex, like the antennae of some insects (whence the generic name). 

 Low white-woolly cespitose perennials, with alternate entire leaves, and usually 

 corymbose, sometimes solitary small heads ; belonging to mountains or cold regions, 

 excepting the common A. plantaginifolia, of the Atlantic States, which also extends 

 westward and northward to Oregon. (The common Everlasting, A. margaritacea, 

 is now included in the next genus.) 



A. RACEMOSA, Hook., of Oregon, &c., is remarkable for little wool, loosely racemose or panicu- 

 late heads, bristles of the pappus rather less united at base, and style of sterile flowers slightly 

 2-lobed at the apex. 



