Flora of North America species comparison

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Eremothera boothii subsp. intermedia
Photo is of parent taxon

Booth's hairy evening-primrose
Habit Herbs densely villous, also densely glandular puberulent, especially in inflorescence.
Stems

5–20 cm.
Leaves

not especially clustered toward base, mostly evenly distributed, 2–5 × 0.3–1.5 cm;

petiole 0–1.5 cm;

blade narrowly elliptic to narrowly lanceolate or lanceolate, sometimes oblanceolate proximally, margins sparsely serrulate to sometimes sinuate-toothed.
Inflorescences

leafy.
Flowers

floral tube 3–5 mm;

petals white, 4–5 mm.
Capsules

usually curved outward or slightly contorted, 0.9–1.4 mm diam. near base.
Seeds

dimorphic.

Eremothera boothii subsp. intermedia
Phenology Flowering late May–Aug(–Sep).
Habitat Sandy or gravelly slopes and flats, sagebrush, shadscale, and rabbitbrush shrublands, pinyon-juniper woodlands.
Elevation 1200–2000 m. (3900–6600 ft.)
Distribution
from FNA
CA; NV
[BONAP county map]
Discussion

Subspecies intermedia is somewhat invariant; it bridges the morphological gap between subspp. alyssoides and boothii. It occurs in Nevada from southeastern Churchill and southern Lander counties south throughout Nye and Esmeralda counties and in southern Mineral County, in northeastern Inyo County, California, and in the Kingston Range, northeastern San Bernardino County, California.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Eremothera > Eremothera boothii
Sibling taxa
E. boothii subsp. alyssoides, E. boothii subsp. boothii, E. boothii subsp. condensata, E. boothii subsp. decorticans, E. boothii subsp. desertorum
Synonyms Oenothera boothii subsp. intermedia, Camissonia boothii subsp. intermedia
Name authority (Munz) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 209. (2007)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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