490 COMPOSITAE (COMPOSITE FAMILY) 



(G. platylepis Greene, 1. c. Probably based on an abnormal specimen.) On 

 the nigh plains; Montana to Colorado. 



2. Grindelia erecta A. Nels. Bull. Torr. Bot. Club 26: 356. 1899. Biennial, 

 stem single from the enlarged crown of a strong taproot, erect, simple below, 

 corymbose-paniculate above, 4-8 dm. high: leaves ample, serrate, the teeth 

 short, acute; radical leaves early deciduous the second season, oblanceolate, 

 on slender petioles, gradually expanded to a broadish base; the lower cauline 

 similar and also petioled but becoming sessile upward, 6-10 cm. long; the 

 uppermost smaller, oblong, sessile by a clasping base: heads large, subglobose, 

 usually leafy-bracteate; involucral bracts numerous, moderately glutinous, 

 appressed, with slender recurved tips: rays slender, numerous, 14-18 mm. 

 long: pappus bristles 2-6, mostly 4, slender, closely barbelluate. In the 

 canons of the foothills and mountains; Wyoming and Colorado. 



3. Grindelia texana Scheele, in Linn. 21: 60. 1848. Stems stout, erect, 

 simple below, 6-12 dm. high: leaves dark or bluish-green, with slender 

 spinulose teeth, only the crown leaves petioled; the cauline oval above to 

 ovate-oblong below, sessile by a broad clasping base: heads large, the rays 

 20-25 mm. long; the bracts broad, even the squarrose tips flat. (Not the 

 G. grandiflora Hook, of Texas.) Central Colorado to New Mexico. 



4. Grindelia squarrosa (Pursh) Dunal, DC. Prodr. 5: 315. 1836. Gla- 

 brous, commonly freely branched from the base up, 3-6 dm. high: leaves ob- 

 long or oblong-spatulate, obtuse, more or less clasping at the base, sharply 

 dentate, sometimes laciniate, 1-3.5 cm. long, 6-12 mm. wide: heads very 

 glutinous; bracts of the involucre linear-lanceolate, subulate-tipped, strongly 

 squarrose: achenes truncate, those of the outer flowers usually thicker than 

 those of the inner; pappus of 2 or 3 awns. From Minnesota and Manitoba to 

 Nevada, Texas, and Mexico. 



5. Grindelia fastigiata Greene, Pitt. 3: 102. 1896. Stems few to several 

 from the woody root, decumbent at base or if few mostly erect, simple or freely 

 branched, 2-4 dm. high: leaves more or less serrate or toothed; the crown 

 leaves petioled, lanceolate or oblanceolate; the cauline mostly sessile, ovate 

 to narrowly oblong, often clasping by the broadish base: heads medium 

 size, subspherical; involucral bracts numerous, glutinous, slender, with squar- 

 rose, reflexed or recurved tips: rays wanting: pappus awns 2 or 3. [G. nuda 

 Wood (?); G. inornata Greene, 1. c.; G. aphanactis Rydb. Bull. Torr. Bot. 

 Club 31: 647. 1904; the latter seemingly founded upon an abnormal spec- 

 imen of G. perennis.] Colorado and New Mexico. 



6. Grindelia decumbens Greene, Pitt. 3: 102. 1896. Stems several, 2-4 dm. 

 high, decumbent at base, encircling a tuft of radical leaves: radical leaves 

 thinnish, oblanceolate, obtuse, 3-5-toothed, tapering very gradually to the 

 narrowly winged petiole; cauline leaves few and small, oblong, acute, entire: 

 heads many, rather small, in a corymbose panicle; bracts of the subglobose 

 involucre rather few, only the outermost short ones conspicuously squarrose: 

 rays ample but few and remote, 10 or 12 to the head: ray-achenes trigonous, 

 those of the disk thin and flat, striate; the 2 or 3 pappus-awns stout, flat, 

 barbellate above. Colorado to New Mexico. 



7. Grindelia perennis A. Nels. 1. c. 110. Root woody, usually with numer- 

 ous slender secondary ones; stems 1 or more from the crown, paniculately 

 corymbose branched above, 3-5 dm. high, rather- leafy above, the basal early 

 deciduous: leaves denticulate, the basal and lowest cauline short-petioled, 

 oblanceolate; the middle cauline sessile, olblong or oblanceolate, 4-7 cm. long; 

 the uppermost oblong or reduced to mere bracts: heads rather numerous, the 

 rays numerous (20-30), about 1 cm. long; involucral bracts glutinous, strongly 

 recurved in undeveloped heads, only slightly squarrose at maturity: pappus 

 bristles 2-6. From Montana to New Mexico, especially on saline flats. 



8. Grindelia subincisa Greene, Pitt. 4: 154. 1900. Stems 2 or more, de- 

 cumbent, 2-3 dm. high, rather loosely branched, the branches slender, spar- 

 ingly leafy, and mostly monocephalous: lowest leaves oblanceolate, rather 

 thin, the margin variously but usually remotely incisely serrate; those of the 

 branches oblong-lanceolate and sessile, incisely serrate: involucres hemi- 



