118 COMPOSITE. Grindelia. 



) Akencs squarely truncate and even at the summit, not bordered nor toothed: pappus-awns 

 only 2 or 3. 



G. Arizonica, GRAY. Rather low aiid slender: cauline leaves oblong-linear or narrowly 

 oblong, obtuse, mostly spinnlose-deuticulate or dentate: heads small (half-inch high): 

 bracts of the involucre short and rather broad, the acnte or subulate-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, DUN AL. 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 spiuulosely serrate or denticulate ; sometimes radical 

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

 recurving short-filiform tips of the bracts: outer akeues 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 sqnarrosa, 

 Pursh, Fl. ii. 559 ; Sims, Bot. Mag. t. 1706 ; Nutt. Gen. ii. 163. Aureliu amplexicuulis, Cass. 

 Diet, xxxvii. 468. Grindelia subdecnrrens , DC. 1. c. G. urgutu, Gray, PI. Wright, ii. 81, not 

 Schrader. Plains ami 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 iu diameter, very glutinous. Varies 

 much : the following are the most marked forms. 



Var. rnida, OKAY. Rays wanting. G. squarrosa, Gray, PI. Fendl. 77. G. micla, Wood 

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

 cently about St. Louis, Missouri. 



Var. grand.ifl.6ra, 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 iu 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 Lindkeiuier, Reverchon, 

 &c., with spinulose or almost aristate teeth. 



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

 sparselv 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. rin/ata, in part, Nutt. Trans. Am. Phil. Soc. vii. 314. G. integrifolia, in 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. 



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

 perhaps iu G. ylutinosa. 



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



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

 lose-deutate or denticulate (lower sometimes laciuiate) : 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, Fl. ii. 248. Prairies and barrens, Texas, 

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

 ably indigenous.) 



H- -w- Pacific species. 



G. CUneif 61ia, 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. robnsta, var. angusti- 

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

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

 two thick. 





