Erythranthe patula |
Erythranthe arvensis |
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stalk-leaved monkey-flower |
field monkey-flower |
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Habit | Annuals with fibrous roots or a filiform-taproot; stems usually 5-15 cm, erect to ascending, straight or sharply bent at nodes, usually unbranched, covered with stalked glands, gland-tipped hairs 0.2-0.5 mm. | Annuals with fibrous roots or taproots, sometimes rooting at nodes near base if decumbent; stems 5-70 cm, erect to decumbent-ascending, unbranched or branching at medial to proximal nodes, generally with 4 angles, hollow or very narrow, glabrous, sometimes with coarse and stiff pubescence in inflorescence, hairs without glands bending backwards. |
Leaves | Leaves cauline, basal ones not persistent; petioles 8-25 mm; blade deltate or somewhat ovate to lanceolate, approximately 4-12 mm long and 3-10 mm broad, palmate venation with 3 veins, base rounded to cuneate-truncate, margins usually finely toothed, apex acute to obtuse, surfaces glabrous as stems. |
Leaves basal and cauline, or basal leaves may not persist, mid-stem or higher leaves often largest and becoming smaller distally; petiolate, petioles 3-20, distally sessile; blade ovate to orbicular to oblong, middle and distal cauline leaves may be orbicular to nearly reniform, generally 10-35 mm long and 6 to 26 broad, 3-5 palmately-arranged veins, earlobe-like appendages near base, base rounded to truncate to slightly cordate, margins distinctly toothed to nearly entire, larger plants show lower leaves lacerate lobed to pinnatifid margin bases, apex rounded, surfaces glabrous except bracts densely villous beneath and occasionally above, long eglandular hairs flattened and sometimes transparent. |
Flowers | Axillary flowers 1-10, emerging from nodes throughout; fruiting pedicels 10-25 mm, glandular as stems; calyx tubular, barely or not inflated, 5-6 mm, margins with distinct teeth or lobes, slightly stipitate-glandular to sparsely hirtellous, lobes pronounced, erect; corollas yellow, lower limb commonly with some red or brownish dots, symmetric radially or bilaterally, regular or weakly bilabiate; tube-throat funnel-shaped, 7-8 mm, protruding beyond calyx margin; lobes oblong, apex rounded to truncate; styles glabrous; anthers not protruding, glabrous. |
Axillary flowers generally 3-8, emerging from distal-most nodes; fruiting pedicels eglandular and smooth, longer than subtending leaves, typically 5-40 mm; calyx sometimes with red dots, ovate to campanulate, inflated, compressed along sagittal plane, 9-14 mm, slightly hirtellous, throat sometimes closed or open, lobes curving upward weakly, top lobe not significantly longer than lower lobe, not distinctly curved; corollas yellow, commonly with red spots, weak bilateral symmetry or near radial symmetry, slightly bilabiate or almost regular; tube-throat cylindric to funnel-shaped, 8-12 mm, protruding 1-2 mm past calyx margin; limb expanded 5-10 mm; styles glabrous; anthers not protruding, glabrous. |
Fruits | Capsules 4-6 mm, included. |
Capsules 6-7 mm, included, stalked. |
Erythranthe patula |
Erythranthe arvensis |
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Flowering time | May-July | May-July |
Habitat | Vernally moist areas, seeps, and stream banks from the lowlands to the middle elevations. | Open slopes and stream bank.; |
Distribution | Occurring east of the Cascades crest in southeastern Washington; southeast Washington to adjacent northeast Oregon and adjacent west-central Idaho.
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Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to southern Idaho, Utah, and Nevada, disjunct in west-central Montana.
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Origin | Native | Native |
Conservation status | Threatened in Washington (WANHP) | Not of concern |
Sibling taxa | ||
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