972 FLORA. 



involucre oblong-ovate, obtuse, glutinous, appressed, the inner ones of the pistillate 

 heads lanceolate, acute or acutish; fertile pappus bright white. 6-8 rnm. long, of 

 1-2 series of capillary bristles, much exceeding the involucre. Along salt marshes 

 and tidal rivers, extending beyond saline influence, Mass, to Fla. and Tex. The 

 white pappus is very conspicuous in autumn. Sept. -Nov. 



3. Baccharis glomeruliflora Pers. AXILLARY-FLOWERED BACCHARIS. 

 Similar to the preceding species but brighter green, the leaves often spatulate ; 

 heads in small sessile or short-peduncled clusters in the upper axils; involucral 

 bracts obtuse. In swamps, Va. to Fla.. near the coast. Sept. -Dec. 



4. Baccharis neglecta Britton. LINEAR-LEAVED BACCHARIS. (I. F. f. 

 3835.) A much-branched, glabrous or slightly glutinous shrub, I m. high or 

 more, the branches paniculate, slender, ascending. Leaves faintly 3 -nerved, grad- 

 ually attenuate into a nearly sessile base, 2-7 cm. long, 2-6 mm. wide; heads in 

 (short-peduncled clusters; involucre of both kinds of heads campanulate, 4mm. 

 nigh, its outer bracts ovate, acute or somewhat obtuse, the inner lanceolate, acu- 

 minate ; pappus of the fertile flowers a single series of capillary dull-white bristles. 

 Neb. to Tex. and northern Mex. July-Sept. 



5. Baccharis Wrightii A. Gray. WRIGHT'S BACCHARIS. (I. F. f. 3836.) 

 Much branched, glabrous, not glutinous, 3-9 dm. high, the branches straight, 

 nearly erect, slender, striate. Leaves linear, sessile, i-nerved, entire, 6-25 mm. 

 long, 1-2 mm. wide; heads solitary at the ends of the branches, 10-12 mm. broad; 

 involucre of the sterile heads hemispheric, about 6 mm. high, that of the fertile 

 ones somewhat campanulate and longer; bracts of both involucres lanceolate, acu- 

 minate, with scarious margins and a green back; pappus tawny or purplish, 

 copious. W. Kans. and Colo, to Tex., Ariz, and Chihuahua. April-July. 



40. FILAGO L. 



White-woolly annual herbs, with alternate entire leaves, and small discoid clus- 

 tered heads, usually subtended by leafy bracts. Bracts of the involucre few and 

 scarious. Receptacle convex or elongated, chaffy, each chaffy scale subtending an 

 achene. Outer flowers of the heads in several series, pistillate, fertile, their corol- 

 las filiform, minutely 2-4-dentate. Central flowers few, perfect, mainly sterile, 

 their corollas tubular, 4-5 -toothed. Anthers sagittate at the base, the auricles 

 acuminate. Achenes compressed or terete. Pappus none. [Latin, filwn, a 

 thread.] About 12 species, natives of both the New World and the Old. In addi- 

 tion to the following, 3 others occur in the western U. S. 



i. Filago prolifera (Nutt.) Britton. FILAGO. (I. F. f. 3837.) Stem simple, 

 or branched at the base, very leafy, 5-15 cm. high. Leaves spatulate, obtuse, 

 sessile, ascending or appressed, 8-16 mm. long, 2-5 mm. wide; heads in a sessile 

 leafy -bracted cluster, usually subtended by I or several slender, nearly leafless 

 branches, each terminated by a similar cluster, or these again proliferous; heads 

 oblong or fusiform; receptacle convex; chaff of the central sterile flowers woolly- 

 tipped, that of the fertile flowers scarious, mostly glabrous. In dry soil, Tex. to 

 Kans. and S. Dak., west to Colo, and N. Mex. April-July. 



41. GI'FOLA Cass. 



White-woolly herbs, closely resembling those of the preceding genus, with alter- 

 nate entire leaves, and small discoid glomerate heads, often subtended by leafy 

 bracts the clusters proliferous in our species. Involucre small, its bracts scarious, 

 imbricated in several series, the outer usually tornentose. Receptacle subulate, 

 cylindric or obconic, chaffy, each chaffy scale near its base enclosing an achene. 

 Outermost flowers pistillate, fertile, with filiform corollas and no pappus, or the 

 pappus a few rudimentary bristles; inner flowers also pistillate and fertile, but 

 with a pappus of capillary scabrous bristles; central (uppermost) flowers few, per- 

 fect their corollas tubular, their pappus capillary and scabrous. Anthers sagit- 

 tate' at the base. Achenes terete or slightly compressed. [Anagram of Filago.} 

 About 10 species, natives of warm and temperate regions. 



i. Gifola Germanica (L.) Dumort. CUDWEED. COTTON ROSE. HERBA 

 IMPIA (I F. f. 3838.) Annual, erect, cottony, 1-4.5 dm - hl g h > simple, or 

 branched at the base, very leafy. Leaves sessile, lanceolate, linear, or slightly 



