Balsamorhiza hookeri
Hooker's balsamroot
11–47 cm; hirsute; from single taproot.
lanceolate to ovate-lanceolate, 1-pinnately divided with some pinnae toothed or lobed to 3-pinnately lobed;
margins entire to crenate or serrate;
surfaces hirsute to hirsute-sericeous;
basal leaves in 1–few rosettes;
blades 12–24 × 4–12 cm;
pinnae 1–10 mm wide;
petioles 4–15 cm;
cauline blades 3–14.5 × 0.6–4 cm;
petioles 4–11 cm.
with 1 terminal head.
8–15 × 15–25 mm.
deciduous, 10–17, yellow;
rays 15–30 × 4–7 mm.
~6 mm.
linear-lanceolate to ovate, 13–20 × 3–6 mm, with or without long-acuminate tips, villous-hirsute and ciliate, sometimes glabrous proximally.
6.5 × 1.5 mm, glabrous.
11–12 mm.
=38.
Balsamorhiza hookeri
Dry, open, often rocky areas. Flowering Apr–Jun. 1000–1600 m. BR, BW. CA, ID, NV, WA; southeast to UT. Native.
As treated here, B. hookeri consists of the members of section Balsamorhiza that are left over after the entities that are distinct in at least some parts of their ranges are removed. Balsamorhiza hookeri hybridizes with B. hispidula and B. sagittata. The species is named after the British botanist William Jackson Hooker, who initially described it as Heliopsis balsamorhiza and tentatively proposed (but did not validly publish, as he did not accept it) the genus Balsamorhiza under the supposition that it would prove to be distinct from Heliopsis once better material was collected.
Abigail (Abby) Moore
CA
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
