Horkelia tridentata Torr. var. tridentata

Oregon: Jackson: [locality and coordinates withheld; status in Oregon: S1 (Critically Imperiled; OBIC)],
On granodiorite, Pinus ponderosa for.; ssw 25°. HerbariumSpecimenDuplicate: Galium bolanderi | herbariumSpecimenDuplicate: Iris chrysophylla | herbariumSpecimenDuplicate: Silene lemmonii | herbariumSpecimenDuplicate: Festuca rubra subsp. pruinosa | herbariumSpecimenDuplicate: Festuca roemeri var. klamathensis | herbariumSpecimenDuplicate: Trisetum canescens | herbariumSpecimenDuplicate: Ceanothus prostratus | herbariumSpecimenDuplicate: Lotus nevadensis var. douglasii Https://intermountainbiota.org/portal/collections/individual/index.php?occid=30915467.

R.H. Whittaker SS 355, 1949-8-21
WS, Catalog: 193472