Difference between revisions of "Eriogonum ovalifolium var. pansum"
Phytologia 66: 259. 1989.
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|common_names=Branched cushion wild buckwheat | |common_names=Branched cushion wild buckwheat | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
|synonyms= | |synonyms= | ||
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|elevation=900-2200 m | |elevation=900-2200 m | ||
|distribution=Idaho;Mont. | |distribution=Idaho;Mont. | ||
| − | |discussion=<p>Variety pansum occurs in two disjunct series of scattered populations. One is in central Idaho (Blaine, Boise, Custer, Elmore, Lemhi, and Valley counties); the second is in western Montana (Lewis and Clark, Lincoln, Missoula, Powell, Sanders, and Silver Bow counties). This variety bridges the morphologic gap between <i>E. ovalifolium</i> and <i>E. strictum </i>var.<i> proliferum</i>. The inflorescence of < | + | |discussion=<p>Variety pansum occurs in two disjunct series of scattered populations. One is in central Idaho (Blaine, Boise, Custer, Elmore, Lemhi, and Valley counties); the second is in western Montana (Lewis and Clark, Lincoln, Missoula, Powell, Sanders, and Silver Bow counties). This variety bridges the morphologic gap between <i>E. ovalifolium</i> and <i>E. strictum </i>var.<i> proliferum</i>. The inflorescence of <i></i>var.<i> pansum</i> is umbellate with branches up to 3 cm long, but never compoundly branched as in <i>E. strictum</i>. The umbellate condition becomes obvious only in late anthesis or during early fruit-set, so immature plants of <i></i>var.<i> pansum</i> might be mistaken for <i></i>var.<i> purpureum</i>, large specimens of <i></i>var.<i> depressum</i>, or short-scaped plants of <i></i>var.<i> ochroleucum</i>. Still, careful observation of such specimens will show an early branching condition, although this can be obscured by bracts subtending the inflorescence or an abundance of early flowers in the numerous involucres. The branched cushion wild buckwheat is certainly worth consideration as an ornamental.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Eriogonum ovalifolium var. pansum | name=Eriogonum ovalifolium var. pansum | ||
| − | |||
|authority=Reveal | |authority=Reveal | ||
|rank=variety | |rank=variety | ||
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|publication title=Phytologia | |publication title=Phytologia | ||
|publication year=1989 | |publication year=1989 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V5/V5_650.xml |
|subfamily=Polygonaceae subfam. Eriogonoideae | |subfamily=Polygonaceae subfam. Eriogonoideae | ||
|genus=Eriogonum | |genus=Eriogonum | ||
Latest revision as of 22:12, 5 November 2020
Plants 2–5 dm wide. Leaf blades usually elliptic, (0.6–)1–2(–2.5) cm, densely tomentose, margins not brownish. Scapes erect, (5–)7–20 cm, thinly tomentose. Inflorescences umbellate, 1–5(–7) × (1.5–)2–5 cm, thinly tomentose; branches absent. Involucres 1 per node, 4–5 mm. Flowers 2.5–5(–7) mm; perianth white.
Phenology: Flowering Jun–Aug.
Habitat: Sandy to gravelly flats and slopes, sagebrush communities, conifer woodlands
Elevation: 900-2200 m
Discussion
Variety pansum occurs in two disjunct series of scattered populations. One is in central Idaho (Blaine, Boise, Custer, Elmore, Lemhi, and Valley counties); the second is in western Montana (Lewis and Clark, Lincoln, Missoula, Powell, Sanders, and Silver Bow counties). This variety bridges the morphologic gap between E. ovalifolium and E. strictum var. proliferum. The inflorescence of var. pansum is umbellate with branches up to 3 cm long, but never compoundly branched as in E. strictum. The umbellate condition becomes obvious only in late anthesis or during early fruit-set, so immature plants of var. pansum might be mistaken for var. purpureum, large specimens of var. depressum, or short-scaped plants of var. ochroleucum. Still, careful observation of such specimens will show an early branching condition, although this can be obscured by bracts subtending the inflorescence or an abundance of early flowers in the numerous involucres. The branched cushion wild buckwheat is certainly worth consideration as an ornamental.
Selected References
None.