FLOWERING PLANTS AND FERNS OF ARIZONA 905 



2. Aplopappus gracilis (Nutt.) A. Gray, Amer. Acad. Arts and Sci. 



Mem. ser. 2, 4: 76. 1849. 



Dieteria gracilis Nutt., Acad. Nat. Sci. Phila. Jour. scr. 2, 1: 

 177. 1848. 



Throughout the State, up to 6,000 feet, dry plains, mesas, and 

 rocky slopes, February to November. Colorado to Texas, Arizona, 

 southeastern California, and Mexico. 



3. Aplopappus spinulosus (Pursh) DC, Prodr. 5: 347. 1836. 



Amellus spinulosus Pursh, Fl. Amer. Sept. 564. 1814. 

 Sideranthus spinulosus Sweet, Hort. Brit. 227. 1826. 



Throughout the State, in various forms, March to October. Minne- 

 sota to Alberta, south to Texas, Arizona, southeastern California, and 

 northern Mexico. 



The typical form, with a tomentose involucre, apparently rare in 

 Arizona, has been collected near Superior, Pinal County, about 2,900 

 feet (Harrison and Peebles 1692, Gillespie 5384). The most common 

 form in Arizona is var. turbinellus (Rydb.) Blake (Sideranthus turbi- 

 nellus Rydb., Eriocarpum australe Greene), characterized by a gland- 

 ular involucre, short rays (8 mm. long or less), usually bipinnatifid 

 lower leaves, and serrate to pinnatifid middle leaves 0.5 to 2.5 cm. 

 long. It occurs from the northeastern corner to the southern bound- 

 ary of the State, up to about 5,000 feet. The var. gooddingii (A. 

 Nels.) Blake (Sideranthus gooddingii A. Nels.), characterized by 

 a glandular involucre, longer rays (8 to 15 mm.), merely pinnatifid 

 lower leaves, and middle leaves 2 to 4 cm. long, pinnatifid with remote 

 narrow lobes, is the prevailing form in western Arizona, ranging from 

 the Grand Canyon and northern Mohave County to western Gila, 

 Maricopa, and Yuma Counties, 3,000 feet or lower. 



Aplopappus junceus Greene, a closely related species, is known from southern 

 California, Baja California, and Sonora, and may be found in Arizona, It is 

 nearest A. spinulosus var. turbinellus but is taller (3 to 10 dm. high) with bright 

 yellowish-green, very sparsely leafy stems, the upper leaves much reduced. 



4. Aplopappus croceus A. Gray, Acad. Nat. Sci. Phila. Proc. 1863: 



65. 1863. 

 The Arizona form is var. genuflexus (Greene) Blake (Pyrrocoma 

 genufiexa Greene, P. adsurgens Greene). San Francisco Peaks to the 

 Mogollon Escarpment (Coconino County), White Mountains (Apache 

 and northern Greenlee Counties), 6,000 to 9,000 feet, mountain 

 meadows and openings in coniferous forest, July to October, type from 

 near Flagstaff (Tourney in 1894), type of P. adsurgens from Flagstaff 

 (Busby 645). The typical form of the species ranges from Wyoming 

 to New Mexico and eastern Utah. 



5. Aplopappus parryi A. Gray, Amer. Jour. Sci. ser. 2, 33 : 239. 1S62. 



Solidago parryi Greene, Erythea 2: 57. 1894. 

 Oreochrysum parryi Rvdb., Torrev Bot. Club Bui. 33: 153. 

 1906. 



Kaibab Plateau, San Francisco Peaks, and Bill Williams Mountain 

 (Coconino County), White Mountains (Apache and northern Greenlee 

 Counties), Pinaleno Mountains (Graham County), Chirieahua and 



