| Erythranthe rubella | |
|---|---|
 | |
| Inyo County, California, 2023 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Phrymaceae |
| Genus: | Erythranthe |
| Species: | E. rubella |
| Binomial name | |
| Erythranthe rubella | |
Erythranthe rubella is a species of monkeyflower known by the common name little redstem monkeyflower. It was formerly known as Mimulus rubellus. [1] [2] [3] [4]
It is native to western North America, including the southwestern United States to Wyoming and Texas, and into Baja California.
Erythranthe rubellus is an annual herb growing 2 to 32 centimeters tall with a very slender, red stem. The oppositely arranged oval leaves are up to 3 centimeters long and lance-shaped to oval, the lower ones borne on short petioles. The herbage is usually lightly hairy and green to reddish in color.
The petite tubular flower is no more than a centimeter long, the base of its tube encapsulated in a narrow, ribbed calyx of sepals. The flower may be yellow or pink in color and the mouth of the flower is usually dotted with red or purple.