View source for Eriogonum evanidum

{{Treatment/ID
|accepted_name=Eriogonum evanidum
|accepted_authority=Reveal
|publications={{Treatment/Publication
|title=Phytologia
|place=86: 132. 2004
|year=2004
}}
|common_names=Vanishing wild buckwheat
|basionyms=
|synonyms=
|hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Eriogonum;Eriogonum subg. Oregonium;Eriogonum evanidum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polygonaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Polygonaceae subfam. Eriogonoideae]]</div><div class="higher-taxon"><small>genus</small>[[Eriogonum]]</div><div class="higher-taxon"><small>subgenus</small>[[Eriogonum subg. Oregonium]]</div><div class="higher-taxon"><small>species</small>[[Eriogonum evanidum]]</div></div>
|volume=Volume 5
|mention_page=page 416
|treatment_page=page 427
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> erect, 1–2 dm, tomentose to floccose, grayish. <b>Stems</b>: aerial flowering stems erect, 0.3–0.6 dm, tomentose to floccose. <b>Leaves</b> basal; petiole 0.5–1.5 cm, tomentose; blade broadly ovate to orbiculate or reniform, 0.7–1.2 × 0.7–1.2 cm, densely white-tomentose abaxially, floccose and greenish adaxially. <b>Inflorescences</b> narrowly cymose, infrequently distally uniparous due to suppression of secondary branches, open, 5–15 × 5–10 cm; branches tomentose to floccose; bracts 0.5–2 × 0.5–1 mm. <b>Peduncles</b> absent. <b>Involucres</b> somewhat appressed to branches, campanulate, 1–2 × 1–2 mm, glabrous; teeth 5, spreading, 0.4–0.8 mm. <b>Flowers</b> 0.8–1.2 mm; perianth ochroleucous, glabrous; tepals dimorphic, those of outer whorl ovate, slightly hastate proximally in fruit, those of inner whorl lanceolate to elliptic; stamens included, 0.4–0.6 mm; filaments glabrous. <b>Achenes</b> dark brown, 3-gonous, 1.3–1.5 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Oct.
|habitat=Sandy to gravelly flats and slopes, sagebrush communities, oak and montane conifer woodlands
|elevation=1100-2100 m
|distribution=Calif.;Mexico (Baja California).
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Eriogonum evanidum</i> is presumed extinct. The last known collections were made in Bear Valley in the San Bernardino Mountains, San Bernardino County, in 1931 (Templeton 1588, BRY, KANS, NY); Hemet Valley in the San Jacinto Mountains, Riverside County (Ziegler s.n., 10 Oct 1967, GH, RSA, UC, UTC); and the Pine Valley area, San Diego County, in 1938. It is related to two sprawling annual Mexican species with mostly elliptic basal leaf blades: E. foliosum S. Watson, with weakly hastate cauline leaves, and E. hastatum Wiggins, with strongly hastate cauline leaves.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Eriogonum evanidum
|authority=Reveal
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=
|family=Polygonaceae
|phenology=Flowering Jul–Oct.
|habitat=Sandy to gravelly flats and slopes, sagebrush communities, oak and montane conifer woodlands
|elevation=1100-2100 m
|distribution=Calif.;Mexico (Baja California).
|reference=None
|publication title=Phytologia
|publication year=2004
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V5/V5_890.xml
|subfamily=Polygonaceae subfam. Eriogonoideae
|genus=Eriogonum
|subgenus=Eriogonum subg. Oregonium
|species=Eriogonum evanidum
}}<!--

-->[[Category:Treatment]][[Category:Eriogonum subg. Oregonium]]