WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 185 
Involucres in the forks of the in- 
florescence sessile. (Leaves 
revolute)..........0.....22-000- 32. E. nudicaule. 
Involucres in the forks of the 
branches distinctly peduncled, 
at least the lower ones. 
Leaves linear, revolute............ 33. FE. tristichum. 
Leaves linear-oblong, flat.........34. E. lonchophyl- 
lum. 
Flowering branches leafy up to the in- 
florescence, the peduncles relatively 
short. 
Leaf blades broad, 1 cm. wide or more, 
oblong to oval, obtuse. 
Involucres 4 to 5 mm. long......... 35. E. fendlerianum. 
Involucres 2 to 2.5 mm. long. 
Branches of the inflorescence 
strongly divaricate............36. E. divergens. 
’ Branches of the inflorescence as- 
cending................--06- 37. E. corymbosum. 
Leaf blades narrow, 5 mm. wide or less, 
linear or spatulate, acute. 
Leaf blades oblanceolate, flat; in- 
florescence densely branched, 
20 cm. high or less, tomentu- 
los@.... 2.2. e eee e ee eee eee eee eee 38. EF. effusum. 
Leaf blades linear, revolute; inflores- 
cence sparingly branched, 5 cm. 
high or less, glabrous or tomen- 
tulose. 
Inflorescence glabrous; leaves 16 
to 35 mm. long...............- 39. FE. leptophyllum. 
Inflorescence tomentulose; leaves 
15 mm. long or less........... 40. E. simpsonii. 
1. Eriogonum alatum Torr. in Sitgreaves, Rep. Zufii & Colo. 168. pl. 8. 1854. 
Tyrer LocaLity: On the Zuni River, New Mexico. 
Ranae: Nebraska and Wyoming to Texas and Arizona. 
New Mexico: Common from the Black Range to the White Mountains and north- 
ward to the Colorado line. Dry slopes, in the Upper Sonoran and Transition zones. 
2. Eriogonum triste 8. Wats. Proc. Amer. Acad. 10: 347. 1875. 
Tyre LocaLity: Kane County, southern Utah. 
RanGeE: Utah and Colorado to Arizona and New Mexico. 
New Mexico: Farmington (Standley 7123); Upper Canadian (Bigelow). Dry hills, 
in the Upper Sonoran Zone. 
3. Eriogonum hieracifolium Benth. in DC. Prodr. 14: 6. 1853. 
TYPE LOCALITY: Western Texas. 
Rance: Southern New Mexico and western Texas. 
New Mexico: Mountains southeast of Patterson; Horse Spring; Gila Hot Springs; 
White Mountains; Fort Stanton; Queen. Dry hills, in the Upper Sonoran Zone. 
4, Eriogonum pannosum Woot. & Standl. Contr. U. S. Nat. Herb. 16: 118. 1913. 
TYPE LocaLity: Organ Mountains, New Mexico. Type collected by G. R. Vasey, 
August, 1881. 
