342 COMPOSIT^E. Gnaplialium. 



slightly decurrent : heads in numerous small clusters terminating the paniculate 

 branches : involucre cylindraceous becoming narrowly campanulate ; the scales 

 dull white, obtuse or acutish. — Nutt. in Trans. Am. Phil. Soc. n. ser. vii. 404 ; 

 Gray, PI. Wright., &c. 



Above the Yosemite Valley (Bolmider), and Sierra Valley (Lcmmon) ; perhaps also near Ray of 

 San Francisco. Also in Oregon, Nevada, and east to New Mexico. Heads 2 or 3 lines long. 



4. Gr. ramosissimum, Xutt. Yiscid-glandular, green, lightly woolly : stems 3 

 to 6 feet high : leaves linear-lanceolate, acute, conspicuously decurrent : heads very 

 numerous and either separate or clustered on the loosely paniculate branches : invo- 

 lucre somewhat turbinate ; the scales dull white and often tinged with rose-color, 

 acutish. — PI. Gamb. 173 ; Gray in Bot. AVilkes Exp. 363. 



Bay of San Francisco to Monterey. Heads not larger than those of the foregoing species. The 

 odor and the glandular herbage as in G. dccurrcns. 



* * Heads small, inconspicuous, in sessile lateral and terminal capitate woolly clus- 

 ters, subtended by leaves : involucre of rather few and sordid or brownish scales : 

 stems low and weak or diffuse, from an annual root. 



5. G-. palustre, Nutt. Loosely very woolly, an inch to a span high, mostly 

 erect and branching mainly from thebase : leaves spatulate verging to lanceolate or 

 linear : heads 2 lines long : scales of the involucre linear, obtuse, pale brown with 

 whitish tips. — G. palustre & G. gossypinum, Nutt. in Trans. Am. Phil. Soc. 1. c. 



Common in moist grounds through the Pacific States, and eastward to and beyond the Rocky 

 Mountains. 



G. ULIGIN(JSUM, Linn., the common little CiuJweccl of the Eastern States and the Old "World, 

 has been credited to California, but probably by mistaking small forms of the foregoing, from 

 which it may be distinguished by its more diffuse growth, heads only a line long, and propoition- 

 ally broader scales of the involucre, of a chestnut-brown color. 



§ 2. Bristles of the pappus united at base into a. rinr/ : heads iii axillary sessile 

 clusters or spicate-glomerate : involucre as in the pirecedlng subdivision {of 

 broivnish and not very numerous scales). — GAMOCHiETA. (Gamocha^ta, Wed- 

 dell.) 



6. Gr. purpureum, Linn. A span to a foot or more high, ascending from an an- 

 nual or mure (niduring root, coated Avith appressed Avhite wool : lower leaves spatulate, 

 their upper surface often becoming naked and green ; upper leaves mostly spatulate- 

 linear, gradually diminished to bracts of the glomerate-spicate inflorescence, the 

 loAver small clusters of which are commonly rather distant : involucre tawny or 

 brownish tinged with purplish. 



Pacific shore, from Columbia Eiver to Santa Barbara (and again in Chili, &c.), agreeing with 

 the plant of the Atlantic coast. G. usfulatum, Nutt. 1. c, from Santa Barbara, is probably the 

 same, perhaps of the more southern G. spicatum form. 



Tribe Y. HELIAJ^THOIDE.E. 



Distinguished from Asteroidece chiefly by the chaff on the receptacle, at least next 

 the margin, and subtending fertile flowers, pappus never capillary or of numerous 

 bristles, and the leaves all or most of them opposite ; the corollas commoidy yellow ; 

 the branches of the style often truncate or tipped with a cone or cusp : from Heleni- 

 oidece known by the chaff of the receptacle, &c. 



The first subtribe {Avihrosiccc, which might as well be regarded as a tribe) is most peculiar in 

 the Artemisia-like habit, and the few or solitary fertile flowers, with corolla wanting or reduced 

 to a short tube, and leaves not rarely alternate. 



The whole tribe is much more copiously represented in the Atlantic States than iu California. 



