Tahoe yellowcress, Rorippa subumbellata, is a globally rare species found only on the sandy shores of Lake Tahoe in California and Nevada, and nowhere else in the world. Elevation 1900 m (6230 ft)
Limestone rock crevices on Cerro Gordo Peak, Inyo Mountains, California, July 7th 2011. This little-known plant in the Brassicaceae was originally placed in the genus Thelypodium, then in its is own genus, Caulstramina, but is now considered a member of the small genus Hesperidanthus. July 7th 2011, Image I11-8982. A Heuchera species (Saxifragaceae) is visible at the left of the image.
Herbarium Blackwellianum emendatum et auctum, id est, Elisabethae Blackwell collectio stirpium.Norimbergae : Typis Io. Iosephi Fleischmanni, 1750-1773..biodiversitylibrary.org/page/291505
Tahoe draba, Draba asterophora, Slide Mountain, Sierra Nevada, Carson Range, Humboldt Toiyabe National Forest, elevation 2690 m (8830 ft). Substrate is rocky granitic colluvium. Also visible are needles of lodgepole pine (Pinus contorta subsp. murrayana).This rare plant is known only from the Mount Rose and Slide Mountain areas of the northern Carson Range in extreme western Nevada, in and just outside of the Lake Tahoe drainage basin. The diploid progenitor of this autotetraploid species survives in a separate population at the south end of the Carson Range in the Heavenly Mountain and Freel Peak areas on either side of the California-Nevada border. An auto-octoploid named var. macrocarpa comprises a third isolated population in the Cup Lake area of California.