Flora of North America species comparison

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Eremothera boothii subsp. alyssoides
Photo is of parent taxon

alyssum like evening primrose, pine creek evening-primrose
Habit Herbs usually strigillose, often densely so, especially in inflorescence, rarely villous and/or glandular puberulent.
Stems

3–35 cm.
Leaves

not especially clustered toward base, mostly evenly distributed, 1–5.5(–7.5) × 0.3–1.6 cm;

petiole 0–6 cm;

blade very narrowly elliptic to narrowly ovate or ovate, margins sparsely denticulate.
Inflorescences

± open.
Flowers

floral tube 3–8 mm;

petals white, 4–5 mm.
Capsules

usually very contorted, 1–1.5 mm diam. near base.
Seeds

monomorphic.

Eremothera boothii subsp. alyssoides
Phenology Flowering May–Jun(–Aug).
Habitat Sandy slopes and flats, sagebrush, shadscale, rabbitbrush shrublands or pinyon-juniper woodlands.
Elevation 600–2000 m. (2000–6600 ft.)
Distribution
from FNA
CA; ID; NV; OR; UT
[BONAP county map]
Discussion

Subspecies alyssoides intergrades broadly with subsp. intermedia in Nevada and is very similar to subsp. desertorum. Sphaerostigma alyssoides var. macrophyllum Small is an illegitimate name that applies here.

(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. boothii, E. boothii subsp. condensata, E. boothii subsp. decorticans, E. boothii subsp. desertorum, E. boothii subsp. intermedia
Synonyms Oenothera alyssoides, Camissonia boothii subsp. alyssoides, C. boothii var. alyssoides, C. boothii var. villosa, Holostigma alyssoides, O. alyssoides var. villosa, O. boothii subsp. alyssoides, O. gauriflora var. hitchcockii, O. utahensis, Sphaerostigma alyssoides, S. hitchcockii, S. implexum, S. macrophyllum, S. utahense
Name authority (Hooker & Arnott) 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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