Aplopappus. COMPOSITE. 131 



char. & syn. Nutt. & Ell., excl. syn. Cass., Lam., & Pluk. Aim. — Dry and sandy ground, 

 Georgia and Florida to Arkansas and Texas ; flowering late. A rigid and rough-hispidulous 

 form with less open inflorescence (Lindheimer, 254, Drummond, 157) is Aplopappus Hookeri- 

 anus, Gray, PI. Lindh. i. 40. 

 A. Hookerianus. Low, loosely branched from the base, barely hirsute, not glandular : 

 leaves not rigid, entire; upper linear or attenuate-lanceolate, sparingly hispidly ciliate; 

 lower spatulate, short, naked : involucral bracts subulate-lanceolate, with less attenuate 

 points. — Isopappus Hookerianus, Torr. & Gray, PI. ii. 239. — Gonzales, Texas, Drummond 

 (184 of coll. 3) ; not since found : perhaps an unusual state of A. divaricatus. 



§ 4. Stexotus, Gray. Heads middle-sized, mostly broad : bracts of the in- 

 volucre from ovate to lanceolate or even linear, not rigid, all of equal or moder- 

 ately unequal length : rays several or numerous : disk-corollas somewhat ampliate 

 upward and deeply 5-toothed : style-appendages various : pappus soft and white 

 or whitish : perennials (herbaceous or fruticulose), of the Rocky Mountains and 

 westward, with leaves all entire. — Proc. Am. Acad. vii. 353. Stenotics, Nutt. 

 Trans. Am. Phil. Soc. 1. c. 334. 



# Solidaginiform herb: heads corvmbiform-eymose or glomerate at the summit of a leafy stem : 

 involucre campanulate : rays 12 to 20, small and narrow : akenes short and glabrous or 

 nearly so. 



A. Parryi, Gkay. Green and almost glabrous, puberulent and somewhat viscid above : 

 stems 6 to 18 inches high from slender rootstocks : leaves oblong-obovate and spatulate, or 

 the upper oblong-lanceolate, thinnish, loosely veiny (2 to 4 inches long) : heads nearly half- 

 inch high, rather numerous (in a dwarf form reduced to a glomerule of 2 or 3) : involucral 

 bracts oblong, obtuse, pale and chartaceous or the outer partly herbaceous, iu about three 

 moderately unequal ranks : flowers pale-yellow : style-appendages lanceolate, rather longer 

 than the stigmatic portion. — Am. Jour. Sci. ser. 2, xxxiii. 10 ; Eaton, Bot. King Exp. 162. 

 — Rocky Mountains, from those of Colorado to the Wahsatch, in open woods, 6,000 to 10,000 

 feet ; first coll. by Parry. Has somewhat the aspect and character of a large corymbose 

 Solidur/o. — Var. minor is a reduced subalpine form (Wahsatch Mountains, Utah, at 12,000 

 feet, M. E. Jones), with leaves only an inch or two long, and 2 or 3 narrower heads. 



# # Tj'pical species, herbaceous or suffruticulose and dwarf: heads solitary, terminating simple 

 steins or branches: rays conspicuous. 



-{— Wholly herbaceous, chiefly alpine, disposed to be cespitose or multicipital, a span or less in 

 height: leaves _ soft, not persistent: involucre hemispherical: rays 15 to 20: style-appendages 

 oblong to subulate, shorter or not longer than the stigmatic portion. 



++ Green, not woolly, mostly equably leafy up to the (half-inch) head. 



A. pygmseus, Gray. Less than a span high, soft-pubescent or glabrate, not viscid nor 

 glandular : leaves from linear-spatulate to spatulate-oblong : involucral bracts oblong, outer 

 ones foliaceous and loose, very obtuse, equalling the thinner innermost : akenes pubescent. — 

 Am. Jour. Sci. ser. 2, xxxiii. 239. Slenotus pygmozus, Torr. & Gray, Fl. ii. 237. — Rocky 

 Mountains, Colorado, strictly alpine ; first coll. by James. 



A. Lyalli, Geat. Rather taller, larger-leaved, viscid-puberulent : leaves obovate-spatulate to 

 oblanceolate : involucre glandular ; its bracts lanceolate, acute, sometimes 2 or 3 outermost 

 oblong and more foliaceous : akenes and ovaries glabrous or nearly so. — Proc. Acad. Philad. 

 1863, 64. — Alpine region of Colorado Rocky Mountains, first coll. by James. Also in 

 northern Rocky and Cascade Mountains, Montana to Oregon and Brit. Columbia ; first coll. 

 by Lyatl. 



++ ++ Woolly or tomentose, at least the involucre, above less leafy, or head pedunculate. 



A. lanugillOSUS, Geat. Fully a span high from creeping rootstocks, floccose-tomentose ; 

 leaves soft, narrowly spatulate or upper linear (inch or two long) ; the sparse uppermost almost 

 filiform : involucre half-inch high ; its bracts lanceolate, acute or acuminate, thin, nearly equal, 

 in two series, outer barely greenish : style-appendages elongated-subulate : akenes sericeous- 

 canescent. — Wilkes Ex. Exped. xvii. 347. — Mountains of Washington Terr. ; first coll. by 

 Pickering and Brackenridge, recently by Nevius, Howell, Brandegee ; and Montana, Watson. 



