WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 721 
Heads mostly less than 10 mm. in diameter; stems 
with more numerous, less reduced leaves; 
stems densely or sparsely pubescent, low. 
Stems densely tomentose; pappus evident, 
nearly equaling the corolla lobes. -....- 8. H. arenosus. 
Stems sparingly tomentose; pappus hidden 
by the hairs of the achenes.......... 9. H. filifolius. 
1. Hymenopappus radiatus Rose, Contr. U. 8. Nat. Herb. 1: 122. 1891. 
Tyrer LocaLity: Willow Springs, Arizona. 
RanGeE: Mountains of southern Arizona and New Mexico. 
New Mexico: Black Range; White and Sacramento mountains. Transition Zone. 
This plant is difficult to distinguish from Leucampyx newberryi, the two being very 
similar in general appearance. Leucampyx is usually a little taller and more 
branched. The two may be definitely distinguished by the presence of chaff on the 
disk in Leucampyx; in Hymenopappus there is none. 
2. Hymenopappus integer Greene, Pittonia 3: 249, 189 
Type LocALITty: Mogollon Mountains, New Mexico. Type collected by Rusby 
(no. 180). 
Rance: Mountains of southwestern New Mexico. 
New Mexico: Mogollon Mountains; G OS Ranch. 
3. Hymenopappus mexicanus A. Gray, Proc. Amer. Acad. 19: 29. 1883. 
Tyrr Locauity: In the higher mountains near San Luis Potosf, Mexico. 
Rance: Mountains of southern New Mexico and northeastern Mexico. 
New Mexico: Mogollon Mountains; Santa Rita; Pinos Altos Mountains. Tran- 
sition Zone. 
4. Hymenopappus flavescens A. Gray, Mem. Amer. Acad. n. ser. 4: 97. 1849. 
Hymenoppapus fishert Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 191. 1913. 
Type Locatity: Between San Miguel and Las Vegas, New Mexico. Type collected 
by Fendler (no. 464). 
Rance: Western Texas to New Mexico. 
New Mexico: Near Las Vegas; Vara Nisa. Plains, Upper Sonoran Zone. 
5. Hymenopappus robustus Greene, Bull. Torrey Club 9: 63. 1882. 
TypE LocaLity: New Mexico. 
Ranae: Western Texas to Arizona. 
New Mexico: Willard; Alamocitas Canyon; Aden; Silver City; Mesilla Valley; 
Organ Mountains; Roswell. Sandy plains and valleys, in the Lower and Upper 
Sonoran zones. 
6. Hymenopappus tenuifolius Pursh, Fl. Amer. Sept. 742. 1814, 
Type Locauity: ‘“‘In Upper Louisiana,”’ 
Rance: Nebraska and Arkansas to Texas and New Mexico. 
New Mexico: Raton; Sierra Grande; San Lorenzo; Patterson; Hope. Plains, in 
the Upper Sonoran Zone. : 
7. Hymenopappus nudatus Woot. & Stand1. Contr. U. 8. Nat. Herb. 16: 191.1913. 
Type LocaLity: Burro Mountains, Grant County, New Mexico. Type collected 
by Metcalfe (no. 107). 
Rance: Western New Mexico. 
New Mexico: Burro Mountains; west of Patterson; Cactus Flat; Santa Rita; Silver 
City. Plains and low hills, in the Upper Sonoran Zone. 
52576°—15—_—46 
