Rare Plant Field Guide

Table of Contents Home Introduction Acknowledgments Definitions Master Plant List USFS List BLM List Other Agencies Glossary References Plant Survey Form HELP! NDIS Home CNHP Home

Photo Copyright © 1999 by G. Kittel Loasaceae (Loasa Family) Synonym: Mentzelia argillosa Look Alikes: N. multicaulis calyx lobes are 10-12 mm long; petals are lanceolate; stems are fairly straight and 20-40 cm tall. In general, Nuttallia species are highly variable, and often can only be distinguished by more technical seed coat characters. Flowering/Fruiting Period: Late June-July/August. Habitat: Steep eroding talus slopes of shale, Green River Formation. Elev. 5800-9000 ft. Photo Copyright © 1999 by G. Kittel Distribution: Utah and Colorado (Garfield Co.). The Utah and Colorado populations may be distinct species given their 200 mile separation and the tendency of Nuttallia species to form local endemic populations. References: O’Kane 1988; Weber and Wittmann 1983; Welsh 1979; Welsh et al. 1993. Please send comments to: Colorado Natural Heritage Program 254 General Services Building, Colorado State University · Fort Collins, CO 80523 · (970) 491-2992