December 2012 Number 1 - Utah Native Plant Society

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Utah Native Plant Society Table 1. Author annotations of specimens at Arizona herbaria: ARIZ, AU, ATC, BLM Safford (BLMS), Grand Canyon National Park (GC), and Museum of Northern Arizona (MNA), previously identified as Allium bigelovii . Allium bigelovii Allium acuminatum Allium atrorubens var cristatum ARIZ: Crooks s.n. 1938; Crooks s.n. 1939; Darrow 10906. ASU: Butterwick 4504, 6165; Gunder s.n. ATC: Kierstad 80 -1; Morefield 1324; Llambreschte 30. BLMS: Lunt s.n. MNA: Haskell & Deaver 2449; Wetherill s.n. ARIZ: Reichenbacher 1391. ASU: Lehto 21378. Allium bisceptrum var. palmeri GC: Stochert s.n. ARIZ: Fishbein 304; Warren 248. ATC: Kasch s.n. 1979, s.n. 1980; Llamphear s.n.; Reese s.n. BLMS: Bingham 3225. MNA: Kewanwytewa s.n. Allium macropetalum ARIZ: Wright s.n. ASU: Duran s.n.; Toleman 6-N. Figure 5. Map of the Arizona distribution of Allium bigelovii based on twenty six collections identified as Allium bigelovii at Arizona herbaria. Figure 6. Revised map of Arizona distribution of Allium bigelovii based on author’s annotations of collections at Arizona herbaria. 58
Calochortiana December 2012 Number 1 Figure 7. Chihuahuan Desert habitat of Allium bigelovii in Greenlee County, Arizona. bigelovii include, from southeast to northwest, Tonto Basin (Crooks s.n. 1939 ARIZ); Verde Formation - Verde Valley (Morefield 1324 ATC; Lambreschte 30 ATC; Haskell & Deaver 2449 MNA; Wetherill s.n. MNA); Rock Springs beds - Table Mountain (Kierstead 80-1 ATC); Milk Creek beds - Walnut Grove (Palmer 532 NY); Burro Creek (Crooks s.n. 1938 ARIZ; Darrow 10906 ARIZ; Butterwick 4504 ASU; Anderson 2008-07 ASU; and Chapin Wash Formation - Anderson Mine (Otton 1981) (Butterwick 6165 ASU; Anderson 2008-03 ASU [Appendix 1]). These disjunct localities brought the Chihuahuan Desert species, Allium bigelovii, into the Sonoran Desert of west central Arizona as far west as Burro Creek, Mohave County (Figures 8, 9). Allium bigelovii is rarer in Arizona than previously thought. It is now known from approximately eight to ten localities (some collections from the Verde Valley have vague locality data on the herbarium labels). Because it occurs throughout southwestern New Mexico and is “…occasionally abundant…” there (Sivinski 2003), A. bigelovii is not a rare species overall. Allium parishii is a rare Mohave Desert species from California with peripheral localities in western Arizona at the eastern edge of its range (Figure 10). The type collection of A. parishii is from Cushenbury Springs, San Bernardino County, CA (S. B. Parish 1344 NY) (Watson 1882). A recent review of Allium parishii by White (2005) documented its current range and status. In California it primarily occurs in the San Bernardino Mountains (San Bernardino County), Little San Bernardino Mountains (Riverside County) and eastward into Joshua Tree National Park (JTNP). White (2005) recommends CNPS List 1B status. Its range in Joshua Tree National Park has recently been expanded by T. La Doux, botanist at JTNP (pers. comm. 2008). In Arizona, Allium parishii was once known only from an historic collection by Marcus Jones in 1903 Figure 8. Sonoran Desert habitat of Allium bigelovii on lacustrine habitat at Burro Creek, Mohave County, Arizona, (westernmost occurrence). Figure 9. Close up of Allium bigelovii at Burro Creek. (Jones s.n., POM) from the Chemehuevi Mountains (Figure 11) which are now identified as the Mohave Mountains just east of Lake Havasu City, Mohave County. In 2005, students from Northern Arizona University made Allium collections in the Mohave Mountains. These collections were originally labeled as Allium atrorubens (Aamodt 9 ATC) and A. nevadense (Dow 13 ATC), but I subsequently identified them as A. parishii. These collections of Allium parishii were thus from the same mountain range as the historic Jones collection, but they included specific GPS locality data. In 2008 I relocated A. parishii in this area (Figure 12) and recorded habitat data, associated species, and GPS locations (Anderson 2008-05 ASU [Appendix 1]). Interestingly, the two sites I recorded were only a mile apart but the plants grew on soils from different geological substrates: granite at Scott’s Well (Figure 13) and metamorphic gneiss near Arrastra Well (Figure 14). Also, the former site contained a diverse Sonoran/Mohave desert 59
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December 2012 Number 1 - Utah Native Plant Society

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