118 COMPOSITE. Grindelia. 



•I— Akenes squarely truncate and even at the summit, not bordered nor toothed: pappus-awns 

 only 2 or 3. 



G. Arizonica, Gray. Rather low and slender : canline leaves oblong-linear or narrowly 

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

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

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

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

 (Adj. Mex.) 



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

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

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

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

 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. 163. Aurelia amplexicaulis, Cass. 

 Diet, xxxvii. 468. Grindelia subdecurrens, DC. 1. c. G. arguta, Gray, PL Wright, ii. 81, not 

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

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

 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. squarrosa, 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, Scheele in Linn. xxi. 60. — Texas, in two forms ; one by, Berlandier, Wright, &c, 

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

 obtuse, closely beset with obtuse callous teeth ; the other collected by Lindlieimer, Reverchon, 

 &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. — G. virgata, in part, Nutt. Trans. Am. Phil. Soc. vii. 314. G. integrifolia, iu part, 

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

 Oregon to Idaho, in dry soil. 



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

 perhaps in G. glutinosa. 



++ 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 the 

 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 tooth. 

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

 Louisiana, Arkansas, and Tennessee. (Barrens near Nashville, Gattinger, where it is prob- 

 ably indigenous. ) 



-H- -H- Pacific species. 



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

 leaves thick, from cuneate-spatulate to linear-oblong, almost all with narrowed base dentic- 

 ulate-serrate or entire : involucre half-inch or more high, little glutinous, the tips of the 

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

 1. c. 315; Torr. & Gray, 1/c. ; Greene in Bot. Gazette, viii. 256. G. robusta, var! angusti- 

 folia, Gray, Bot. Calif, i. 304, chiefly. — Salt marshes and shores, California, from Santa 

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

 two thick. 



