Northern Prairie Wildlife Research Center


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Aquatic and Wetland Vascular Plants of the Northern Great Plains

45. Scrophulariaceae, the Figwort Family

7. Mimulus L. -- Monkey-flower

3. Mimilus guttatus DC. -- Common yellow monkey-flower

Annual or perennial 0.5-6 dm tall, with stolons or rhizomes, the main stem simple or branched, glabrous or glandular-puberulent above. Leaves petioled below to sessile and clasping above, reduced to bracts in the inflorescence, the blades variable in shape, subrotund or broadly ovate to obovate, sometimes broadly elliptic, 2-8 cm long, 1-4 cm wide, glabrous or pubescent, irregularly dentate. Flowers yellow, showy, in leafy-bracteate, loosely flowered, terminal racemes; pedicels 1-2.5 cm long; calyx accrescent, irregular, 10-17 mm long, the upper lobe largest, the lower lobes projected upward in fruit; corolla often spotted with reddish-brown, strongly bilabiate, 25-45 mm long, bearded at the throat. Capsule flattened, ovate, about equaling the calyx tube. Jul--Sep. Margins of springs and spring-fed streams in the Black Hills and sparingly eastward where probably introduced; (Rocky Mts., from AK to Mex., sparingly intro. as an ornamental and escaped in the e U.S.).

Mimulus guttatus.

Map key

Previous Section -- Mimulus glabratus H.B.K. -- Roundleaf monkey-flower
Return to Family -- Scrophulariaceae - The Figwort Family
Next Section -- Mimulus ringens L. -- Allegheny monkey-flower

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