Flora of North America species comparison

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Eriogonum microthecum var. arceuthinum
Photo is of parent taxon

Juniper Mountain wild buckwheat
Habit Subshrubs, 0.5–0.7 × 1–1.5 dm.
Stems

caudex spreading;

aerial flowering stems 0.1–0.3 dm, glabrous.
Leaves

blade linear, 0.5–0.8 × 0.05–0.1 cm, densely white-tomentose adaxially, sparsely floccose or glabrous and green adaxially, margins revolute.
Inflorescences

0.5–2.5 cm;

branches sparsely floccose or glabrous.
Involucres

2–3 mm, glabrous.
Flowers

1.5–2 mm;

perianth white.
Achenes

1.5–2 mm.

Eriogonum microthecum var. arceuthinum
Phenology Flowering Jul–Sep.
Habitat Volcanic slopes and cliffs, oak and pinyon-juniper woodlands
Elevation 1900-2100 m (6200-6900 ft)
Distribution
from FNA
NV
[BONAP county map]
Discussion

Variety arceuthinum was gathered originally by Carl Purpus in the “Juniper Mountains” in 1898. It is uncertain whether his collection came from southwestern Iron County, Utah, or from southeastern Lincoln County, Nevada. A single, sterile collection (Shultz & Shultz 7109, BRY, GH) with dubious label data supposedly was found in Nevada, and a second collection from that state, made by A. Jerry Tiehm and sent to L. M. Schulz, apparently has been lost.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 247.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Eriogonum > subg. Eucycla > Eriogonum microthecum
Sibling taxa
E. microthecum var. alpinum, E. microthecum var. ambiguum, E. microthecum var. corymbosoides, E. microthecum var. johnstonii, E. microthecum var. lacus-ursi, E. microthecum var. lapidicola, E. microthecum var. laxiflorum, E. microthecum var. microthecum, E. microthecum var. panamintense, E. microthecum var. phoeniceum, E. microthecum var. schoolcraftii, E. microthecum var. simpsonii
Name authority Reveal: Phytologia 86: 135. (2004)
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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