''Epilobium siskiyouense'' is a rare species of flowering plant in the evening primrose family known by the common names Siskiyou willowherb and Siskiyou fireweed (though it is not a true fireweed).

Distribution

The plant is endemic to the Klamath Mountains of far

northern California Northern California (colloquially known as NorCal) is a geographic and cultural region that generally comprises the northern portion of the U.S. state of California. Spanning the state's northernmost 48 counties, its main population centers incl ...

and southern Oregon. It grows in mountain habitats, including

alpine Alpine may refer to any mountainous region. It may also refer to: Places Europe * Alps, a European mountain range ** Alpine states, which overlap with the European range Australia * Alpine, New South Wales, a Northern Village * Alpine National Pa ...

talus and subalpine coniferous forest, often on

serpentine soil Serpentine soil is an uncommon soil type produced by weathered ultramafic rock such as peridotite and its metamorphic derivatives such as serpentinite. More precisely, serpentine soil contains minerals of the serpentine subgroup, especially anti ...

Description

''Epilobium siskiyouense'' is a small, clumping subshrub growing scaly, often densely hairy and glandular from a woody

caudex A caudex (plural: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695 In the strict sense of the term, meaning a stem, "caudex" is m ...

reaching up to about 25 centimeters in maximum height. The leaves are lance-shaped to oval and under 3 centimeters long. The glandular inflorescence bears bright to deep pink flowers with petals 1 or 2 centimeters long. The fruit is a hairy capsule reaching up to 4.5 centimeters in length.

External links

Jepson Manual Treatment for ''Epilobium siskiyouense''''Epilobium siskiyouense'' — U.C. Photo gallery
siskiyouense Flora of California Flora of Oregon Flora of the Klamath Mountains Endemic flora of the United States Rogue River-Siskiyou National Forest Flora without expected TNC conservation status {{Myrtales-stub