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Mimulus hymenophyllus which is also known as Membrane leaf Monkey-flower is a species of monkey flower.

Image of Mimulus Hymenophyllus at Google

Mimulus hymenophyllus which is also known as Membrane leaf Monkey-flower, Thinsepal Monkey-flower is a species of monkey flower.


• Mimulus hymenophyllus is a species of flowering plant in the lopseed family.
• This herb is a native to Hells Canyon on the border between Oregon and Idaho in the United States.
• This plant is a perennial herb.
• This herb produces masses of thin, fragile, winged stems.
• The stems can grow up to 25 centimeters long.
• They are coated in glandular hairs.
• The leaves are oppositely arranged in pairs.
• They are lance-shaped to oval.
• The corolla is funnel-shaped and variable in size.
• The corolla grows up to 2.8 centimeters in length.
• It is yellow with some red or purple dots inside.
• The flowering occurs in April through September.
• This plant grows on wet spots in cracks in basalt and limestone cliffs alongside ferns and bryophytes.
• They are usually above flowing water in streams and rivers.

Growing/Caring conditions for Mimulus hymenophyllus

• Mimulus will grow best in full sun.
• The soil should be moist.
• These plants like to grow in wet ground.
• High temperatures and drying out in drought periods should be completely avoided.
• Plant out any time after May.
• Plant in late September for over-wintering plants.
• This will enable to flower early in the succeeding spring.
• Grow on plants under cover.
• When they reach a height of 8 to 10 cm, they can be transplanted outside.
• Mimulus are ideal for planting in containers.
• They thrive well in a pot.
• Fill the container up to three quarters full and add multipurpose compost.
• Carefully remove the plant from its tray.
• Fill container back in with soil and gently firm it down.
• Water generously.
• Let other plants not over-shade the mimulus as plenty of sun is required by these plants.
• Wash off any aphids that appear on these plants.
• Do it with a carefully aimed jet of water.
• If an infestation of aphids occurs, use an insecticidal soap to treat the problem.
• Cut back the plants once they are grown scraggly.
• Cut them at the end of the flowering period.
• Plant 6 to 12 inches apart.
• Fertilize once or twice during the growing season if desired.
• Pull up and discard plants in autumn after felled by frost.
• Plant the monkey flower seedling in full sun or partial shade.
• Plant them in well-drained soil.
• Cut off old leaves and stems using bypass pruners in early spring.
• Leave 4 to 6 inches of stems.
• Shear off old flowers with scissors.
• This will encourage more blooms.
• Mulch the soil around, but not on top.

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