118 COMPOSITE. Grinddia. 



■)— Akenes squarely truncate and even at tte summit, not bordered nor toothed: pappus-awns 

 only 2 or 3. 



G. Arizonioa, Gray. Rather low and slender: cauline leaves oblong-linear or narrowly 

 oblong, obtuse, mostly spiniilose-denticulate or dentate: heads small (half-inch high): 

 bracts of the involucre short and rather broad, the acute or subulate-acuminate tips not pro- 

 longed nor spreading. — Proc. Am. Acad. xvii. 208. G. microcephala, Kothr. in Wheeler 

 Rep. vi. 141, not DC. — Mesas of Arizona and New Mexico, Wright, Bothrock, Brandegee. 

 (xVdj. Mex.) 



" G. squarrosa, Dusal. Commonly only a foot or two high and branched from the base : 

 leaves rigid ; cauline from spatulate- to linear-oblong and with either broadisli or narrowed 

 half-clasping base, acutely and often spiuulosely serrate or denticulate ; sometimes radical 

 and even cauline laciniate-pinnatifid : involucre strongly squarrose with the spreading acd 

 recurving short-filiform tips of the bracts : outer akenes commonly (but not always) corky- 

 thickened and with broad truncate summit, those toward the centre narrower and thinner- 

 walled and with smaller areola. — DC. Prodr. v. 315; Torr. & Gray, 1. c. Donia squarrosa, 

 Pursh, PI. ii. 559 ; Sims, Bot. Mag. t. 1706 ,■ Nutt. Gen. ii. 16.3. Auretia umplexicavlis, Cass. 

 Diet, xxxvii. 468. Gnruhlia subdecnrrans, DC. 1. c. G, arguta, Gray, PI. Wright, ii. 81, not 

 Silirader. — Plains and prairies, Minnesota and Saskatchewan to Montana and south to 

 Missouri and Texas, west to Nevada, Arizona, and borders of California. (Mex.) — Pleads 

 small or middle-sized ; involucre half to two-thirds inch in diameter, very glutinous. Varies 

 much : the following are the most marked forms. 



— !— Var. nuda, Gray. Rays wanting. — G. srjiiarrosa, Gray, PI. Pendl. 77. G. nuda, Wood 

 in Bot. Gazette, iii. 50. — With the usual radiate form in New Mexico, Colorado, and re- 

 cently about St. Louis, Missouri. 



~~~~ Var. grandiflora, Gray. Heads larger and with very numerous rays (of an inch in 

 length) : stem 2 to 4 feet high, strict and simple below: upper leaves from ovate to 

 oblong, broader or not narrowed at base, more numerously and equally serrate either with 

 obtuse or spinulose teeth. — PI. Wright, i. 98. G. grandiflora, Hook. Bot Mag. t. 4628. G. 

 Texana, Seheele in Linn. xxi. 60. — Texas, in two forms; one by Berhmdier, Wright, &c., 

 with heads no larger than is common in G. srptarrosa, and the leaves elliptical or oval and 

 obtuse, closely beset with obtuse callous teeth ; the other collected by Lindheimer, Eeverchon, 

 &c., with spinulose or almost aristate teeth. 

 G. Oregana. Stem rather stout and tall, branched above : leaves thickish, not rigid, 

 sparsely denticulate or entire, mostly obtuse, oblong-spatulate or Ungulate, or the upper lan- 

 ceolate (the larger cauline 4 inches long and an inch wide) ; heads large (rays an inch long) : 

 bracts of the involucre with erect or spreading slender linear-subulate tips : akenes minutely 

 striate.— 6r\ rirgata, in part, Nutt. Trans. Am. Phil. S(X'. vii. 314. G. integrifolia, in part, 

 Nutt. 1. c. ; Torr. & Gray, 1. c, not DC. Vonia glutinosa. Hook. PI, ii. 25, not R. Br. — 

 Oregon to Idaho, in dry soil. 



-i- -i- Akenes all or some outer ones 1-2-dentate or auriculate-bordered at the summit, except 

 perhaps in G, glutinosa. 



■H- Atlantic species: pappus-awns mostly 2. 

 . G. lanceolata, Nutt. Stem 2 feet high, slender : leaves lanceolate or linear, acute spinu- 

 lose-dentate or denticulate (lower sometimes laciniate) : heads as in G. squarrosa but tlie 

 subulate-attenuate elongated tips of the involucral bracts straight and erect or the lower 

 spreading : summit of the akene produced from each or the outer margin into a short tootli 

 — Jour. Acad. Philad. vii. 73; Torr. & Gray, Fl. ii. 248. — Prairies and barrens Texas 

 Lomsiana, Arkansas, and Tennessee. (Barrens near Nashville, Gattiimr, where it 'is prob- 

 ably indigenous.) ^ 



•H- -H- Pacific species. 

 G. cuneif olia, Nutt. Suffrutesceut, stout, 3 or 4 feet high, mostly maritime much branched ■ 

 leaves tluck, from cuneate-spatulate to liiiear-ol.loug, almost all "with narrowed bisc' deutic' 

 ulate-serrate or entire: involucre half-inch or more high, little glutinous, the ti,,Uf tlie 

 _ bracts either scarcely or decidedly squarrose : pappus-awns 5 to 8. — Trans Vm Phil Soc 

 he. 315; Torr & Gray, 1. c. ; Greene in Bot. Gazette, viii. 256. G. rol.usta, var. a.qusti- 

 film Gray, Bot. Calif, i. 304, chiefly. - Salt mar.shas and shores, California, from Santa 

 Barbara Bay northward; flowering in October. Woody base of stem becoming an inch or 

 two thick. ° 



