Aster. COMPOSITiE. 205 



striate : receptacle alveolate the alveoli toothed or lacerate : style-appenda2;es 

 from linear-lanceolate to filiform-subulate : pappus copious and simple, of rather 

 rigid unequal bristles : leafy-stemmed and branching biennials (sometimes more 

 enduring, but no rootstocks, stolons or buds below the crown), or occasionally 

 annuals (W. N. American and Mexican): the showy heads terminating the 

 branches : involucre either canescent or somewhat viscid or glandular : leaves 

 from sparingly dentate to bipinnatcly parted, the teeth or lobeS apt to be bristle- 

 tipped. — Gray, Proc. Am. Acad. viii. G47, & Bot. Calif, i. 322. Machceranthera, 

 Nees, Ast. 224 ; Gray, PI. Wright, i. 90. Dieteria, Nutt. Trans. Am. I^hil. Soc. 

 vii. 300 ; Torr. & Gray, Fl. ii. 99. 



* Anomalous, seemingly pei'ennial and multicipital, but otlierwise of this section. 

 A. Coloradoensis, Gray. A span or less high, forming a tuft of short few-leaved stems 

 ou a strong tap root, cauescently pubescent, not at all glandular : leaves spatulatc or ob- 

 lanceolate (about an inch long), coarsely dentate, the teetli tipped with conspicuous bristles: 

 heads solitary, broadly hemispherical, lialf-inch high : involucral bracts small and numerous, 

 well imbricated, subulate-lanceolate, rather close : rays 35 to 40, violet-purple, barely half- 

 iucli long : akenes turbinate, short, densely canescent-vilk)us, half the length of the compara- 

 tively rigid pappus. — Proc. Am. Acad. xi. 7G ; Eothrock in Wheeler Kep. vi. 149, t. 7. — 

 Common in South Park, Colorado, Porter, Cunby, Greene, &,c. Also San Juan Pass, at 

 12,000 feet, BranJegec. 



* * Genuine species, with annual or biennial but never truly perennial root. 

 •i— Involucre densely hispidulous as well as viscid, very squarrose: akenes glabrous or glabrate : 

 pappus slender: heads large and broad (the disk two-thirds to full inch in diameter): iierbage 

 green, not canescent, glabrate: leaves from ineisely dentate to entire, their teeth or tips ob- 

 scurely if at all mucronate-setigerous: rays bright violet, showy: root biennial or somewhat 

 more enduring. 



A. Pattersoni, Gnw. A span or two high, branched from the summit of the tap root : 

 stems or brandies with soft or cottony-tomentulose ]mbescence, or glabrate : leaves thickish, 

 spatulate or Ungulate, entire or coarsely few-toothed, none widened at base: heads solitary 

 or few : involucral bracts lanceolate: rays about 30, fully half-inch long. — Proc. Am. Acad. 

 xiii. 272, excl. var. Macharanthcra canescens, var. aJpina, Porter & Coulter, PL Colorad. 

 59. — Moist ground along streams, Gray's Peak, Colorado; first coll. by Parry, theu by Pat- 

 terson, &c. 



A. Bigelovii, Gray. A foot or two high, robust: stem leafy, branching above, roughish- 

 hirsutc to glabrate ; the flowering branches or peduncles glandular-hirsute, terminated by 

 showy large heads : leaves oblong or lanceolate, irregularly and sometimes ineisely dentate, 

 sometimes entire ; radical lanceolate-spatulate ; cauline oldong to lanceolate, usually with 

 broadish partly clasping base : involucral bracts very numerous, linear-attenuate or the pro- 

 longed and much recurved tips almost filiform : rays very many, an inch or less long. — 

 Pacif. R.Tiep. iv. 97, t. 10. A. Townshendil, Hook. f. Bot. Mag. t. 6430 (wrong as to the 

 broadly obovate style-aj)peudagos figured and described) ; Eoliiiison, Garden, xvii. t. 228. — 

 Southern Colorado and New Mexico, Bi(jelow, Braiidcjee, liushi/, &c. Very handsome in 

 cultivation. 



4— -f— Involucre from nearly glabrous to glandular-pubcrulent or canescent, not i-arely viscid, but 

 not hirsute or hispidulous: heads less ample: akenes densely pubescent. 



++ Leaves at most ineisely dentate, rather rigid: root disposed to be biennial or somewhat more 

 enduring. — Dieteria, Nutt. 



A. gymnocephalus, (^uay. Stem erect, simple or branched from a rather slender root, 

 commonly hirsute; or hisj)idu]ous, equably leafy to the top : branches bearing solitary usually 

 nakod-podunculate middle-sized heads : leaves spatulate-oblong to lanceolate ; cauliue short 

 (inch or less long), usually obtuse, copiously serrate or denticulate with sjiinulose-setigcrous 

 teeth: involucre depressed-hemispherical, half-inch or less high; its br:xcts linear-subulate 

 with the tips squarrose : rays purple, 4 or 5 lines long: receptacle fimbrillate. — Proc. Am. 

 Acad. XV. 32 ; Hook. f. Bot. Mag. t. 6549. Aplopappiis /jjjmnorep/talus, DC. Prodr. v. 346, & 

 A. blephariph>/Uus, Gray, PI. Wright, i. 97 ; the ray-flowers having been thought to be yellow. 



