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 B. Jennings Aspleniaceae (Spleenwort Fern Family) Synonym: Asplenium adiantum-nigrum Look Alikes: Cystopteris fragilis is far more common, has crescent or comma shaped indusia, and more finely divided leaves. Spore-Producing Period: This species remains green throughout the year. Spores are produced July-December. Habitat: Sandstone cliffs at White Rocks, Boulder Co. Grows in shaded cracks, crevices, and ledges on relatively dry south and east-facing cliffs. Elev. 5200 ft. Photo Copyright © 1999 by C. Crawford Distribution: Asia, Africa, Europe. In the United States in Hawaii, Arizona, Utah and Colorado (Boulder Co.). References: Atwood et al. 1991; Flora of North America Editorial Committee 1993; O’Kane 1988; Phillips 1988. Please send comments to: Colorado Natural Heritage Program 254 General Services Building, Colorado State University · Fort Collins, CO 80523 · (970) 491-2992