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Greene's Tuctoria
Tuctoria greenei
About Greene's Tuctoria (Tuctoria greenei) 0 Nurseries Carry This Plant Tuctoria greenei is a species of grass endemic to California. Its common names include awnless spiralgrass and Greene's tuctoria. It is included by the California Native Plant Society on list 1B. 1 (rare, threatened, or endangered). It is also listed by the state of California as rare and by the Federal Government as endangered, having been federally listed on March 26, 1997. This grass typically occurs in vernal pools in open grassland on the eastern side of the Sacramento and San Joaquin Valleys. This endangered species is threatened by the destruction of its already rare vernal pool habitat. Processes causing this habitat destruction include agriculture, urban development, overgrazing and trampling by livestock, alterations in hydrology, and introduced species.
Plant Description
Plant Type
Plant Type

Flower Color
Flower Color

Landscaping Information
Natural Setting
Annual Precipitation: 12.5" - 30.0", Summer Precipitation: 0.19" - 1.20", Coldest Month: 35.3" - 50.6", Hottest Month: 65.2" - 77.3", Humidity: 1.49" - 24.59", Elevation: 26" - 3583"

Alternative Names
Common Names: Awnless Spiralgrass

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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