RSA - California Botanic Garden Herbarium (RSA:RSA)
f7336142-8895-4acc-b037-df26f1e5a297
731246
Mentzelia congesta Nutt. ex Torr. & Gray
Loasaceae
Steve Boyd
11936
2008-05-01
Valentin Arvizu
United States, California, Kern, Piute Mountains, lower Esperanza Canyon at eastern base of Sorrell Peak and western edge of Kelso Valley.
35.4186111 -118.2561111 +-1000m.
1372-1463 meters
4500-4800ft.
Alluvial flats and moderate to steep slopes, granitic substrate with large boulder outcrops, loose, decomposed granite soils. Vegetation recently burned (2006 or 2007), formerly dominated by scrub of Artemisia tridentata, Chrysothamnus nauseosus, Yucca brevifolia on flats, drier slopes scrubby woodland of Pinus sabiniana, P. monophytlla, Quercus wislizenii, Q. chrysolepis, Fremontodendron californicum, etc.
Annual, flowers yellow, bracts prominent with large white patch in center. Locally common on slope.