Gnajjiadiu-m. COilPOSIT^. 235 



oblong obtuse. (Slr,nrlPr forms resemble G. lut.r^olh.m of the Old WorlJ. which has duller 

 or sordid heads and Hal,rous-pube.=rei,t ake,.f.<. A slender form in Xew AlPxico &c 

 nearly approaches the ilexicaTT-'y. gradk, HBK., which ha> veUowi,h involucre )- Bot' 

 B.-.cli. 150; Torr. & Gray, >1. ii.427; Gray, Bot. Calif, i. 341." C. CTiOense V],r. .,g -v.t 

 m. 4SX ex Le,s. lu Lmn. vi. 52.5, but not Chilian. G. luteo^ilh.jm, Hook. 1].; Xutt. Trans. 

 Am. Phil. ^.jr. 1. c. (var. occiJentale), &c. — Moist or drv ground, from X. Ore<'on to > Cali- 

 fornia, and ea.-tward to W. Texas, (ilex.) 



-)--,--!- Leayi-s obviously adnate-decurrent, the upper face at least becoming naked and green 

 Hi age and with the stem glandular-pubescent or glanduhir-viscid: herbage strouglv bal-amic- 

 scentcd. ° ' 



H-i- Eoot apparently annual or biennial. 

 -G. decurrens, Ives. sxc_;n stont, 2 or 3 feet high, corvmboselv branched at summit and 

 bearing crowded cymosely di-posed glomerules of broad head^ : leave, verv numerous' lan- 

 ceolate or the upper linear, white-wooUy beneath or rarelv glabrate; involucre broadlv'cam- 

 panulate, white, usually becoming rusty-tinged ; the thin-scarious bracts ovate and oblong, 

 acutish, only the innermost liaear-lauceolate and acute. — Am. .Jour. >^ i. i .j-O t 1 • Torr' 

 Compeiid. i~- Hook. Fl. i Si?; dc. Prodr. vi. 236; Torr. & Grav, 1. c; Grav, But'. ra:it' 

 1.346. — Eather open and dry ground, Xew England to Pennsvlvania, Upper ilichigan, 

 Colorado, also Texas, Xew Mexico, and to Brit. Columbia and Washington Terr. 



Var. Californicum, Geat, 1. c. Bracts of tlie involucre more pearly white : k-a , p^ 

 usually .horter.— G. Coijornicum, DC. 1. c. ; Torr. & Gray, L c, exd. var. — ThroutrLout 

 the western part of California, and to .San Bernardino Co. roli.iit .,ometimes wbolly 

 green. 



G. ramosissimmn, Xm. Greener than G. decurrens, soon ghibrate, and more glandn- 

 lar-viscid: .tf-m 2 to 6 feet high, paniculately and fa.tiL'iately much branched above; leaves 

 smaller, linear : heads amply and rather loosely paniculate, s mall (commonly 2 lines long), 

 comparatively few-flowered ■ involucre turbinate ; its bracts fewer, narrower, white or 

 tinged with rose.— PI. Gamb. 172; Gray in Wnkes Exped. x™. 363, & Bot. Calif. .342. 

 G. ■•^prfifijtJa, var. eruhescens, Xutt. Trans. Am. PhU. S-jc. L c, a form with rosv bracts. 

 G. Cui:foriiicum, var.. Torr. & Gray, 1. c. — Thickets, &c., W. California, from the Sacra- 

 mento to Los Angeles ; first colL by SiMall. 



++ -i-i- Eoot lignescent-perennial. 

 G. leucooeplialuin, Gr.vt. Very white with close wool, except the upper face of the 

 leave-: stems a foot or two high, strict, mostly simple, very leafy : cauline leaves all nar- 

 rowly linear, small (not over 2 inches long, a line or two wide), attennate-acute, commonly 

 erect, hardly broader at the short-decuxrent base, viscid-glandular above: beads in a rather 

 close cyme : involucre broadly campannlate, much imbricated, pure pearly white ; the 

 bracts thin-papery, ovate and oblong, obtuse. — PI. Wright, ii. 99. — Dry water-courses, 

 western borders of Te.xas to Arizona and S. California, Wright, Thurber, Parish, &c. 



^ * Involucre less imbricated, more involved in w-iol. the scarious tips of the nearly equal bracts 

 comparatively inconspicuous and dull-colored : lieads glomerate and leafy-bractt^ai-^. only a line 

 or so in length : low and brandling annuals, a few inches or rarely a foot high : akenes in the 

 same species either smooth or scabrous. .Species perhaps confluent. 



' G. palustre, Xctt. Loosely floccose with long wool, erect, at length diffuse or weak : 

 leaves (3 to o lines wide) spatulate or the uppermost oblong or lanceolate : tips of the linear 

 involucral bracts white, obtnse. — Gray, Bot. Calif, i. 342. O. palustre & G. gossypinwn, 

 X'utt. Trans. Am. PhU. Sijc. L c; Torr. & Gray, Fl. ii. 427. 42S. — Common in all moist 

 ground.-, from Washington Terr, to S. California, east to Wyoming and Xew Mexico. 



G. uliginosum, L. (Ccdw-eed.) Appressed-wooUy, soon diifusely branched: leaves 

 spatulate-linear or the lower spatnlate-oblanceolate : involucral bracts brownish to the tip or 

 soon becoming so, acutish or obtuse, the outermost oblong. — FL Dan. 859; Engl. Bot. 

 1194; DC. Prodr. vi. 230. — Low or wet ground, a common weed, from Xewfoundland to 

 Virginia and west to the Mississippi; seemingly introduced from En. Also in Ciregon and 

 Brit. Columbia, where the preceding appears to pass into this. (Eu., X. Asia.) 



G. Stricttun, Ge-4y. Appressed-woolly : stem strict and simple, a span to a foot high, 

 sometimes branching or with ascending stems from the base : leaves all linear, seldom a line 

 wide : heads in spicately disposed glomertiles in the ajtila or on short lateral branches : invo- 



