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Erythranthe hallii
Erythranthe hallii (Greene)G.L.Nesom
Hall's Monkeyflower
Phrymaceae (Lopseed Family)
Synonym(s): Mimulus guttatus var. hallii, Mimulus hallii
USDA Symbol: ERHA7
USDA Native Status: L48 (N)
"Annuals, fibrous-rooted, sometimes apparently rooting at proximal nodes if stems proximally decumbent. Stems erect, simple, 4-angled, 2-8 cm, slender, glabrous." (Webref: 38).
"Erythranthe hallii is known from Boulder, Clear Creek, Fremont, Grand, Jefferson, Larimer, Routt, and Saguache counties. The Colorado population system is morphologically and geographically coherent.
Erythranthe hallii is similar to E. arvensis; both have four-angled stems, autogamous reproduction, a tendency to root at basal nodes and distally, and both have bracteal leaves villous with vitreous, flattened, eglandular, multicellular hairs, although this vestiture is barely developed and often absent in E. hallii. The only reported chromosome number from the Colorado plants (2n = 32) also appears to be distinct among possible relatives of E. hallii. " (Webref: 38).
From the Image Gallery
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Plant Characteristics
Duration: AnnualHabit: Herb
Root Type: Fibrous
Leaf Shape: Oblong , Ovate
Leaf Pubescence: Glabrous , Villose
Leaf Margin: Dentate
Leaf Apex: Acute , Obtuse
Leaf Base: Cuneate , Truncate
Leaf: "Leaves basal and cauline or basal deciduous, largest at mid stem or above, cauline relatively few on long internodes; petiole: basal and proximals to midcauline 1-4 mm, distals 0 mm; blade palmately 3-veined, ovate to ovate-lanceolate, 5-11 x 3-9 mm, base truncate to cuneate, margins very shallowly dentate or denticulate, apex acute to obtuse, surfaces glabrous or distals and bracteals sparsely villous, hairs vitreous, flattened, eglandular, multicellular." (Webref: 38).
Flower: "Flowers plesiogamous, (1-)4-10, sometimes from all nodes, usually beginning about mid stem, cleistogamous. Fruiting pedicels usually deflexed 90 degrees at calyx, 6-14 mm, longer than subtending leaves. Fruiting calyces sometimes red-dotted, broadly elliptic-ovoid, inflated, sagittally compressed, (5-)7-10 mm, glabrous, throat closing, adaxial lobe not distinctly longer than abaxial, not falcate. Corollas yellow, usually red-dotted, bilaterally or nearly radially symmetric, bilabiate or nearly regular; tube-throat narrowly cylindric, 4-6 mm, exserted 0.5-1 mm beyond calyx margin; limb barely expanded. Styles glabrous. Anthers included, glabrous." (Webref: 38).
Fruit: "Capsules included, 4-6 mm." (Webref: 38).
Bloom Information
Bloom Color: Red , YellowBloom Time: May , Jun , Jul , Aug
Bloom Notes: "Phenology: Flowering May-Aug." (Webref: 38).
Distribution
USA: CONative Distribution: A Colorado endemic.
Native Habitat: "Habitat: Ledges, seeps, along streams, wet meadows. Elevation: 1900-3200 m." (Webref: 38).
Growing Conditions
Water Use: MediumLight Requirement: Sun , Part Shade
Soil Moisture: Moist , Wet
Soil Description: Moist soils.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:Santa Barbara Botanic Garden - Santa Barbara, CA
Web Reference
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Additional resources
USDA: Find Erythranthe hallii in USDA PlantsFNA: Find Erythranthe hallii in the Flora of North America (if available)
Google: Search Google for Erythranthe hallii
Metadata
Record Modified: 0000-00-00Research By: Joseph A. Marcus