Eriogonum corymbosum var. nilesii
Phytologia 86: 128. 2004.
Shrubs, 3–12 × 4–23 dm. Leaves cauline 1/2 or more length of flowering stem; petiole 0.3–1.5 cm; blade elliptic to oblong, 0.8–2.5(–3) × 0.4–0.8 cm, white-lanate to densely white-tomentose abaxially, silvery-floccose adaxially. Inflorescences 2–20 cm; branches floccose. Involucres 1.5–2 × 1–1.5 mm. Flowers 2–3 mm; perianth yellow to pale yellow or, rarely, white, glabrous.
Phenology: Flowering Aug–Nov.
Habitat: Sandy to gravelly or gypsum flats and washes, saltbush communities
Elevation: 200-900 m
Variety nilesii is a plant of the Mojave Desert, known for certain only from the Las Vegas and Muddy Mountains region of Clark County, Nevada. A collection from the flood plain of the Paria River in Kane County, Utah, is tentatively assigned to this variety.