WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 665 
New Mexico: Raton; Sierra Grande; Las Vegas; Estancia; Santa Fe; Socorro; 
Bernal; Suwanee; Pecos; Torrance; White Sands; Gray; Pajarito Park. Open slopes 
and on plains, in the Lower and Upper Sonoran zones. 
6. Sideranthus laevis Woot. & Standl. Contr. U. S. Nat. Herb. 16: 180. 1913. 
TYPE LocALIty: Gypsum hills near Lakewood, New Mexico. Type collected by 
Wooton, August 6, 1909. 
Ran@e: Known only from type locality. 
7. Sideranthus glaberrimus Rydb. Bull. Torrey Club 27: 621. 1900. 
Sideranthus spinulosus glaberrimus A. Nels. in Coulter, New Man. Rocky Mount. 
489. 1909. 
Type Locauity: Nebraska. 
RANGE: Nebraska and Kansas to Colorado and northeastern New Mexico, 
New Mexico: Raton; Nara Visa; highest point of the Llano Estacado. Plains and 
low hills, in the Upper Sonoran Zone. 
8. Sideranthus gracilis (Nutt.) Rydb. Colo. Agr. Exp. Sta. Bull. 100: 344. 1906. 
Dieteria gracilis Nutt. Journ. Acad. Phiia. II. 1: 177. 1848. 
Aplopappus gracilis A. Gray, Mem. Amer. Acad. n. ser. 4: 76. 1849. 
Eriocarpum gracile Greene, Erythea 2: 189. 1894. 
Type Locauity: Near Santa Fe, New Mexico. Type collected by Gambel. 
RanGE: Colorado and Utah to Arizona, western Texas, and Mexico. 
New Mexico: Stinking Lake; Dulce; Fort Bayard; Mangas Springs; Socorro Moun- 
tain; Gila Hot Springs; San Luis Mountains; Organ Mountains, Plains and low hills, 
in the Lower and Upper Sonoran zones. 
9. Sideranthus australis (Greene) Rydb. Bull. Torrey Club 27: 621. 1900. 
Eriocarpum australe Greene, Erythea 2: 108. 1894. 
TyprE Locauity: ‘‘Texas, New Mexico, Arizona, and adjacent Mexico.”’ 
Rance: Western Texas to Arizona and southward. 
New Mexico: Carrizo Mountains; Santa Fe; Kennedy; Socorro Mountain; Magda- 
lena; Burro Mountains; Carrizalillo Mountains; Sabinal; Kingston; Mesilla Valley; 
Organ Mountains; Redlands. Plains and dry hills, in the Lower and Upper Sonoran 
zones. 
20. ISOCOMA Nutt. RayLress GOLDENROD. 
Stout perennial herbs, 50 cm. high or less, with linear to oblanceolate, entire or 
toothed leaves; heads very numerous, corymbose, yellow-flowered; involucres tur- 
binate or narrowly campanulate, the bracts thick, coriaceous, appressed in several 
series; corollas inflated; achenes short, sericeous, 
KEY TO THE SPECIES. 
Bracts all acute... 2... 2-22-2222 eee eee eee eee ee eee eens 1. I. oxylepis. 
. Bracts obtuse or only the innermost acute. 
Leaves linear; heads slender-pedunculate................-..- 2. I. wrightii. 
Leaves linear-oblanceolate, usually narrowly so; heads mostly 
sessile or subsessile...........22-..20-2-22--2--2-202-2-- 3. I. heterophylla. 
1. Isocoma oxylepis Woot. & Stand]. Contr. U. 8. Nat. Herb. 16: 180. 1913. 
Typr LocaLity: Near White Water, New Mexico or Chihuahua. Type collected by 
E. A. Mearns (no. 2288). 
Rance: Mountains of southwestern New Mexico and adjacent Mexico. 
New Mexico: Near White Water; Dog Spring. 
2. Isocoma wrightii (A. Gray) Woot. & Standl. Contr. U. S. Nat. Herb. 16: 181. 
1913. 
Linosyris wrightti A. Gray, Pl. Wright. 1: 95. 1852. 
Bigelovia wrightti A. Gray, Proc. Amer. Acad. 8: 639. 1873. 
