Biology:Mimulus evanescens
| Mimulus evanescens | |
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| Kingdom: | Plantae
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| Species: | M. evanescens
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| Binomial name | |
| Mimulus evanescens Meinke
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Mimulus evanescens is a rare species of monkeyflower known by the common name disappearing monkeyflower. It is native to the western United States, where it is known from about ten locations in and around the Great Basin within the states of Idaho, Oregon, and California .[1] Specimens of the plant had been catalogued as Mimulus breviflorus, but on further examination it was evident that they were a separate, unclassified species; this was described to science in 1995.[1] It is thought that the plant may have evolved via hybridization between M. breviflorus and M. latidens, or that M. evanescens evolved from M. latidens and then into M. breviflorus.[1][2][3][4][5]
M. evanescens is a succulent annual herb coated with tiny glandular hairs and having a somewhat slimy texture. The thin stems grow mostly erect to a maximum height near 25 centimeters (9.8 in). The leaves are lance-shaped to oval and up to 4 centimeters (1.6 in) long by 3 centimeters (1.2 in) wide. The flowers are small and barely open, their tubular bases enclosed in a ribbed calyx of sepals, which becomes papery and inflated as the fruits mature. The flower is less than 1 centimeter (0.39 in) long and is mostly yellow in color, sometimes with brownish dots in the throat.
M. evanescens has been observed in rocky sagebrush habitat, especially in areas still moist from early spring soaking.[6] Most of the areas where the plant grows are on rangeland used for grazing livestock.[6] Threats to the plant include land degradation from cattle grazing, encroachment by invasive plant species, and changes in the hydrology of the plant's vernally wet habitat.[7]
References
- ↑ 1.0 1.1 1.2 Meinke, R. J. (1995). "Mimulus evanescens (Scrophulariaceae): A new annual species from the northern Great Basin". Great Basin Naturalist 55 (3): 249–57. https://ojs.lib.byu.edu/ojs/index.php/wnan/article/viewFile/622/1503.
- ↑ Barker, W. L. (Bill) (2012). "A Taxonomic Conspectus of Phyrmaceae: A Narrowed Circumscription for MIMULUS, New and Resurrected Genera, and New Names and Combinations". Phytoneuron 39: 1–60. ISSN 2153-733X. http://www.phytoneuron.net/PhytoN-Phrymaceae.pdf.
- ↑ Beardsley, P. M.; Yen, Alan; Olmstead, R. G. (2003). "AFLP Phylogeny of Mimulus Section Erythranthe and the Evolution of Hummingbird Pollination". Evolution 57 (6): 1397–1410. doi:10.1554/02-086. PMID 12894947. http://www.amjbot.org/content/89/7/1093.full.
- ↑ Beardsley, P. M.; Olmstead, R. G. (2002). "Redefining Phrymaceae: the placement of Mimulus, tribe Mimuleae, and Phryma". American Journal of Botany 89 (7): 1093–1102. doi:10.3732/ajb.89.7.1093. PMID 21665709. http://www.amjbot.org/content/89/7/1093.full.
- ↑ Beardsley, P. M.; Schoenig, Steve E.; Whittall, Justen B.; Olmstead, Richard G. (2004). "Patterns of Evolution in Western North American Mimulus (Phrymaceae)". American Journal of Botany 91 (3): 474–4890. doi:10.3732/ajb.91.3.474. PMID 21653403.
- ↑ 6.0 6.1 USFS Sensitive Vascular Plant Profile
- ↑ Meinke, R. J. Site management plan for Mimulus evanescens at Dog Hollow Reservoir
External links
- Jepson eFlora treatment of Mimulus evanescens
- Jepson Manual Status Page
- USDA Plants Profile for Mimulus evanescens
- CNPS Rare Plant Profile
- Mimulus evanescens — UC Photo gallery
Wikidata ☰ Q16755641 entry
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