View source for Erythranthe willisii

{{Treatment/ID
|accepted_name=Erythranthe willisii
|accepted_authority=G. L. Nesom
|publications={{Treatment/Publication
|title=Phytoneuron
|place=2017-17: 7, figs. 14–22. 2017
|year=2017
}}
|common_names=Willis’s monkeyflower
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms=
|synonyms=
|hierarchy=Phrymaceae;Erythranthe;Erythranthe willisii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Phrymaceae]]</div><div class="higher-taxon"><small>genus</small>[[Erythranthe]]</div><div class="higher-taxon"><small>species</small>[[Erythranthe willisii]]</div></div>
|volume=Volume 17
|mention_page=page 378, 391, 402
|treatment_page=page 401
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> rhizomatous, rarely rooting at proximal nodes, usually forming large colonies, rhizomes white, usually highly branching. <b>Stems</b> usually sprawling-decumbent, branched, sometimes simple, 7–45 cm, nodes (2–)4–15+, densely glandular-villous, hairs 1–2 mm, glandular, internodes evident. <b>Leaves</b> usually cauline, basal not persistent, distinctly separated; petiole 0 mm, sometimes 1–2 mm at proximal nodes; blade bicolored, purplish abaxially, pinnately veined, ovate to elliptic-ovate, midcauline 10–35 × 6–18 mm, base rounded to subcordate, margins coarsely serrate-dentate to denticulate or subentire, apex short-attenuate to acute, obtuse, or rounded, surfaces densely glandular-villous, hairs 1–2 mm, gland-tipped. <b>Flowers</b> herkogamous, (4–)8–30+, from medial to distal nodes, sometimes from all nodes. <b>Fruiting</b> pedicels 4–20(–25) mm, densely glandular-villous, hairs 1–2 mm, gland-tipped. <b>Fruiting</b> calyces ridge- to wing-angled, campanulate to cylindric-campanulate, weakly inflated, 7–10 mm, densely glandular-villous, lobes erect to slightly spreading, unequal, triangular to linear-lanceolate, 2–4 mm, apex acuminate-apiculate. <b>Corollas</b> yellow, throat, tube, and proximal portion of abaxial 3 lobes with fine, red to brownish lines, weakly bilaterally or nearly radially symmetric, weakly bilabiate or nearly regular; tube-throat narrowly funnelform, 12–15 mm, exserted beyond calyx margin; limb 9–12 mm wide (pressed), lobes oblong-obovate, apex rounded to notched. <b>Styles</b> glabrous. <b>Anthers</b> included, glabrous or finely hirtellous to scabrous. <b>Capsules</b> included, 4–5 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Sep.
|habitat=Seepage, drainage margins, moist soils, talus, cracks and crevices, soils deprived from serpentine.
|elevation=(500–)700–900 m.
|distribution=Calif.
|discussion=<p><i>Erythranthe willisii</i> is narrowly endemic over serpentine along the North Fork Feather River (including the North Branch) in Plumas County. In the original description, its range was said to include serpentine localities in closely adjacent areas of east-central Butte, Plumas, and northwestern Yuba counties, but subsequent field work has shown that these peripheral populations are <i>E. moschata</i>, and that <i>E. willisii</i> occurs only in the bottom of the Serpentine Canyon area. The most consistent and recognizable features of <i>E. willisii</i> are the long, sprawling stems often spread over a large area, sometimes reaching at least 45 cm and often with many crowded nodes, sessile or subsessile leaves with rounded to subcordate bases, and short pedicels, characteristically no longer than the subtending leaves (except sometimes the distal ones where subtending leaves are distinctly reduced in size). It is possible that stem growth in <i>E. willisii</i> is indeterminate versus determinate in <i>E. moschata</i>. Sessile to subsessile leaves occur in <i>E. moschata</i>, especially in the California Sierra <i>Nevada</i>, but petiole length and leaf base shape are variable within populations; lack of petioles and a rounded/subcordate base are fixed characters in <i>E. willisii</i> (as they are also in <i>E. ptilota</i>). Although large colonies of <i>E. moschata</i> are sometimes encountered, the individual plants tend to be erect (in California) and with few distal flowers. In the field, the dense vestiture of <i>E. willisii</i> is a prominent feature, but this is harder to distinguish in pressed specimens, and there is a strong tendency for purple abaxial leaf coloration in <i>E. willisii</i>. Phenology and flower morphology of <i>E. willisii</i> and <i>E. moschata</i> appear to be similar, but <i>E. moschata</i> in north-central California does not occur at as low elevations as <i>E. willisii</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Erythranthe willisii
|authority=G. L. Nesom
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Phrymaceae
|phenology=Flowering May–Sep.
|habitat=Seepage, drainage margins, moist soils, talus, cracks and crevices, soils deprived from serpentine.
|elevation=(500–)700–900 m.
|distribution=Calif.
|reference=None
|publication title=Phytoneuron
|publication year=2017
|special status=Illustrated;Endemic;Conservation concern
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V17/V17_1318.xml
|genus=Erythranthe
|species=Erythranthe willisii
}}<!--

-->[[Category:Treatment]][[Category:Erythranthe]]