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Arizona; Mohave County; Grand Canyon National Park, Trail Canyon, River Mile 219.75, tarnsect 1B, 12 0289222 E, 3968910N (14.5 m accuracy), 1758 ft (536). Growing with Baccaris salicifolia, Polypogon monspeliensis, Bromus rubens, Bebbia juncea, Encelia farinosa, Sonchus oleraceus, Guterrezia sarothrae, Pulchea sericea, Ephedra, Penstemon palmeri, Silene antirrhina, Isocoma acradenia, Senna covesii, Brickellia longifolia, Astragalus nuttallianus, Linanthus begelovii, Linum lewisii, Descurainia pinnata, Vulpia, Pedidium montanum, Thymphylla pentachaeta belenidium, Erigeron divergens, Mammeillaria grahamii, Larrea tridentata, Porophyllum gracile, Allionia incarnata, Phoradendron californicum, Phacelia ambigua/pedicellata, Schismus arabicus, Muhlenbergia microsperma, Datura wrightii, Oenothera caespitosa, Sarcostemma cynanchoides, Nicotiana obtusifolia obtusifolia, Acacia greggii, Tamarix ramosissima, Trixis californica, Erigeron lobatus, Prosopis galndulosa torreyana, Lepidium lasiocarpum, Poa begelovii, Erodium cicutarium, Eucnide urens, Cheilanthes feei, Cirsium neomexicanum (white flowers), Gilia flavocincta, Menacladus glanduliferus, Sphaeralcea grossularifolia, Camissonia cf multijuga, Cryptantha maritima, Biguiera parishii, Juncus torreyi, Aristida adscensionis, Aristida purpurea nealleyi, Dasychloa pulchella, Brickellia coulteri. On east slope: Eriogonum fasciculatum, Opuntia basilaris basilaris, Porophyllum gracils, Ferocactus cylindraceus, Ephedra, Bromus rubens, Acacia greggii, Cylindropuntia acanthocarpa, Viguiera parishii, Mammillaria grahamii, Typha domingensis, Bromus tectorum, Langloisia setosissima, Trixis californica.