Trifolium piorkowskii Common Name: maverick clover Family: Fabaceae Synonyms: Element Code: Full Name: Trifolium piorkowskii Rand. Morgan & A.L. Barber USDA PLANTS Symbol: Biology Lifeform: annual herb Blooming Period: Apr-May Habitat: volcanic clay, openings, often streambanks. • Chaparral • Cismontane woodland • Lower montane coniferous forest • Valley and foothill grassland (mesic) • Vernal pools

Rarity Status California Rare Plant Rank: 1B.2 Rare or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2 S2: Imperiled. Global Rank: G2 G2: Imperiled. Occurrence Data from CDFW California Natural Diversity Database Total # of Known Element Occurrences: Element Occurrence Ranks: A B C D X U Population Status: Historic >20 yrs Recent <=20 yrs Presence: Present Extant Possibly Extirpated Presumed Extirpated Notes Possibly threatened by grazing, trampling, vehicles, and mining. Similar to, and previously identified as, T. fucatum. See Novon 23(1):65-69 (2014) for original description. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 2018-01-30 Last Update: 2018-02-28

Location Elevation: 160 - 680 meters California Endemic: no Other States: California Counties and Islands:   name (code) Quads:   name (DWR code) USGS code Notes: Definitions of codes preceding a county and/or quad: * Presumed extirpated ? Uncertain about distribution or identity ?* Uncertain about distribution, but presumed extirpated if once present (?) Occurrence confirmed, but possibly extirpated Species may be present in other areas where conditions are favorable. This data should NOT be substituted for pre-project review or for on-site surveys.

Presumed Extant Presumed Extirpated or Unknown 3985

Links to Leading Resources of Taxon Information USDA PLANTS Calflora Consortium of California Herbaria CalPhotos California Department of Fish and Wildlife: CNDDB Quick Viewer Suggested Citation California Native Plant Society, Rare Plant Program. . Inventory of Rare and Endangered Plants of California (online edition, v8-03). Website http://www.rareplants.cnps.org [accessed ].

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