Equisetaceae – Horsetail Family

Equisetum arvense FIELD HORSETAIL.  COMMON HORSETAIL.  Perennial.  Coconino, Navajo, Apache and Gila counties, 5000-8000 feet [K&P;].  Grand Canyon National Park: Kanabownits Spring, North Rim, 7938 feet (Coconino County) [PP&B;].  Northern Hualapai Mountains, Mohave County; moist soil along drainages [JANAS-24/25].  West Fork of Oak Creek Canyon of Coconino County [DP-21(1)]. Equisetum x ferrissii Continue Reading

Aspleniaceae – Spleenwort Family

Asplenium adiantum-nigrum.  BLACK SPLEENWORT.  Perennial.  Mt. Elden at about 7500 feet [K&P;]. Asplenium platyneuron.  EBONY SPLEENWORT.  Perennial.  FNA range map shows this species occurring as a disjunct population in the middle of northern Arizona [FNA-2]. Asplenium resiliens.  BLACK-STEMMED SPLEENWORT.  BLACKSTEM SPLEENWORT.  Perennial.  Near Flagstaff (Coconino County), and in the mountains of Gila County, Continue Reading

Amaranthaceae – Amaranthus Family

Amaranthus acanthochiton (=Acanthochiton wrightii).  GREENSTRIPE.  Annual.  Navajo County at ca. 5000-6000 feet [McD]. Amaranthus albus (Amaranthus graecizans is a name misapplied to this species. [USDA]). PROSTRATE PIGWEED.  Annual.  Throughout region at 1000-8000 feet [McD, A. graecizans].  Northern Hualapai Mountains, Mohave County: Along Antelope Wash [JANAS-24/25, A. graecizans]. Amaranthus cruentus.  RED COXCOMB.  PURPLE AMARANTH.  RED AMARANTH.  Annual. Continue Reading

Anacardiaceae – Sumac or Cashew Family

Rhus glabra.  SMOOTH SUMAC.  Shrub.  Yavapai, Coconino, Navajo, and Apache counties, 5000-8000 feet [McD].Rhus ovata.  SUGAR SUMAC.  SUGARBUSH.  Shrub or small tree.  Mohave, Yavapai, and Coconino counties, 3000-5000 feet [McD]. Northern Hualapai Mountains, Mohave County [JANAS-24/25].  Along state highway 96 at ca. 2700 feet elevation, Yavapai County [LD]. Rhus trilobata (=Rhus Continue Reading