Neoholmgrenia hilgardii

(Greene) W. L. Wagner & Hoch

Novon 19: 132. 2009.

Basionym: Oenothera hilgardii Greene Bull. Torrey Bot. Club 10: 41. 1883
Synonyms: Camissonia hilgardii (Greene) P. H. Raven Holmgrenia hilgardii (Greene) W. L. Wagner & Hoch O. andina var. hilgardii (Greene) Munz Sphaerostigma andinum var. hilgardii (Greene) A. Nelson S. hilgardii (Greene) Small
Treatment appears in FNA Volume 10.
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Herbs finely strigillose, more densely so distally, espe­cially on ovary. Stems erect to ascending, capillary, 1–15 cm. Leaves linear to linear-oblanceolate, 1–3 × 0.1–0.3 cm. Flowers opening near sunrise; floral tube 1.5–2 mm; sepals 2–3 mm; petals 2.5–5 mm; epi­sepalous fila­ments 2–4 mm, epipetalous filaments 1.5–2.8 mm, sometimes epipetalous stamens absent, anthers of longer stamens 0.7–0.8 mm, those of shorter ones 0.5–0.6 mm; style 4.5–6 mm, sparsely pubescent near base, stigma 0.7–0.8 mm diam., surrounded by anthers at anthesis. Capsules ascending, strongly flattened from unequal width of valves, 5–10 × 1–1.3 mm. Seeds 0.7–1.3 × 0.3–0.4 mm. 2n = 14.


Phenology: Flowering May–Jul.
Habitat: Sandy or clay soil, in sagebrush scrub.
Elevation: 0–500 m.

Discussion

Neoholmgrenia hilgardii is probably self-compatible but outcrossing. The species occasionally grows sympatrically with N. andina (P. H. Raven 1969). It is known from Chelan, Douglas, Grant, Kittitas, Okanagan, and Yakima counties, Washington. The species was collected twice along the lower Columbia River, at Bingen, Klickitat County, Washington, and Hayden Island, Multnomah County, Oregon.

Selected References

None.

Lower Taxa

None.
... more about "Neoholmgrenia hilgardii"
Warren L. Wagner +
(Greene) W. L. Wagner & Hoch +
Oenothera hilgardii +
Oreg. +  and Wash. +
0–500 m. +
Sandy or clay soil, in sagebrush scrub. +
Flowering May–Jul. +
Camissonia hilgardii +, Holmgrenia hilgardii +, O. andina var. hilgardii +, Sphaerostigma andinum var. hilgardii +  and S. hilgardii +
Neoholmgrenia hilgardii +
Neoholmgrenia +
species +