Aquatic and Wetland Vascular Plants of the Northern Great Plains

45. Scrophulariaceae, the Figwort Family

7. Mimulus L. -- Monkey-flower

2. Mimulus glabratus H.B.K. -- Roundleaf monkey-flower

Low, branching and spreading perennial, the stems rather succulent, mostly prostrate and rooting at the nodes, ascending at the tips, 0.5-5 dm long, often forming extensive mats. Leaves sessile or the lower ones with winged petioles, the blades subrotund to rotund-ovate or reniform, 0.8-3 cm across, weakly to distinctly dentate, pubescent when young, glabrous with age. Flowers yellow, on pedicels 10-40 cm long; calyx accrescent, irregular, somewhat bilabiate or oblique, 5-9 mm long, the upper lobe much enlarged, the lateral and lower lobes very low or lacking; corolla obscurely bilabiate, 9-15 mm long, the throat open and bearded. Capsule ovoid, 5-6 mm long. Jul--Aug. Cold springs, seepage areas and banks of spring-fed streams; occasional from e and c ND to NE; (MI to Man. and MT, s to TX, AZ, NV and into Mex. and S.Amer.).

Plants of this region belong to the northern var. fremontii (Benth.) Grant.

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