Ecotones Microclimates North American Monsoons — aka: Mexican monsoons, Southwestern U.S. monsoons, Arizona monsoons. Vegetation types Vegetation types and habitats are differentiated by elevation The higher elevation Madrean Sky Islands support Single-leaf Pinyon pine (Pinus monophylla) and California juniper (Juniperus californica), with areas of Manzanita and Coulter pine (Pinus coulteri). Desert riparian habitats support Fremont cottonwood (Populus fremontii), willows (Salix species). Introduced Tamarisk trees are an invasive species in these areas. Flora Endemic species Endemic flora species of the Colorado Desert include: Hesperocallis undulata — Desert lily Nolina bigelovii — Bigelow's nolina Peucephyllum schottii — Desert fir Salvia greatae — Orocopia sage Astragalus lentiginosus var. coachellae — Coachella Valley Milkvetch Species endemic to California habitats, found in the Colorado Desert include: Astragalus tricarinatus — Triplerib milkvetch Chorizanthe parryi — Parry's spineflower Ericameria pinifolia — Pinebush Leptosyne bigelovii — Bigelow coreopsis Pholisma sonorae — Sandfood See also Natural history of the Colorado Desert List of flora of the Sonoran Desert Region by common name Flora of the California desert regions Flora of the Sonoran Deserts Fauna of the Colorado Desert References F .Colorado .Colorado F