Epilobium rigidum

Epilobium rigidum is an uncommon species of flowering plant in the evening primrose family known by the common names stiff willowherb and Siskiyou Mountains willowherb.

Stiff willowherb
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Onagraceae
Genus: Epilobium
Species:
E. rigidum
Binomial name
Epilobium rigidum

It is endemic to the Klamath Mountains of far northern California and southern Oregon, where it grows in dry, open areas in lower elevation coniferous forest habitat, often on serpentine soils.

This is a perennial herb forming upright clumps or mats of tough, peeling stems around a woody caudex. It bears bright pink flowers with heart-shaped petals up to 2 centimeters long flanked by pointed reddish sepals. The fruit is a hairy capsule up to 3.5 centimeters long.


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