Corispermum navicula
Author: Mosyakin

North Park bugseed

Chenopodiaceae (goosefoot family)

Close up of Corispermum navicula by David G. Anderson

Close up of Corispermum navicula by David G. Anderson
Close up of Corispermum navicula by David G. Anderson

Taxonomic Comments

Treated as a Colorado endemic by Kartesz (1999), his record based on personal communication with W.A. Weber. Some Oklahoma specimens may belong here (Mosyakin 1995, Flora of North America 1993+). Described in 1995; the plants had been considered within C. hyssopifolium [sensu lato].

Ranks and Status

Global rank: G1?
State rank: S1
Federal protection status: BLM Sensitive
State protection status: None

Description and Phenology

Corispermum navicula: no artwork available

General description: Annual plants about 5-15 cm tall, branched from the base, sparesly covered with branced and almost stellate hairs, or almost glabrous.  Leaves are 2-4 cm long, narrowly lanceolate or linear-lanceolate.  Inflorescences are usually compact and dense, ovate or oblong-ovate in outline.  Mature fruit body is usually dark brown or dark green, usually with dark spots and whitish warts.  The fruit are narrowly winged or almost wingless (Mosyakin 1995).

Look Alikes: Corispermum navicula has longer fruit (4 mm long) than other Corispermum species known from Colorado (Weber and Wittmann 2012).

Phenology: Fruiting in October (Colorado Natural Heritage Program 2012).


Habitat of Corispermum navicula by David G. Anderson

Sand dunes; probably also sandy and gravelly shores (Flora of North America 1993+).

Elevation Range: 8,235 - 8,727 feet (2,510 - 2,660 meters)


Colorado endemic: Yes
Global range: Thought to be endemic to Colorado but additonal reserach is needed (Flora of North America 1993+). Known from the North Sand Dunes in Jackson County, Colorado. Estimated range is 17 square kilometers (6 square miles), calculated in GIS by drawing a minimum convex polygon around the known occurrences (calculated by the Colorado Natural Heritage Program in 2008).
Distribution of Corispermum navicula in Colorado according to mapped land ownership/management boundaries (CNHP 2012, COMaP v9 ).

Distribution of Corispermum navicula in Colorado

Threats and Management Issues

Summary results of an analysis of the status of Corispermum navicula based on several ranking factors. This species was concluded to be “Moderately Conserved”. From Rondeau et al. 2011.

Off-road-vehicle use is considered to be the primary threat to the species at this time (Rondeau et al. 2011). Two sand dunes complexes support the plant; one of the complexes is heavily used by off-road-vehicles in areas inhabited and possibly previously inhabited by the plant. Off-road vehicles are prohibited on the second dune complex (Colorado Natural Heritage Program 2012).


    • Ackerfield, J. 2012. The Flora of Colorado. Colorado State University Herbarium. 433 pp.
    • Colorado Natural Heritage Program. 2005. The Second Annual Colorado Rare Plant Symposium: G1 Plants of Colorado. Symposium Minutes. Available on-line
    • Colorado Natural Heritage Program. 2010. The Seventh Annual Colorado Rare Plant Symposium: G1 Plants of Colorado. Symposium Minutes. Available on-line
    • Flora of North America Editorial Committee, ed. (FNA). 1993+. Flora of North America North of Mexico. Oxford Univ. Press, New York, Oxford.
    • Flora of North America Editorial Committee. 2003. Flora of North America North of Mexico. Vol. 4, Magnoliophyta: Caryophyllidae, part 1. Oxford University Press, New York. 559 pp.
    • Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
    • Lavender, A.E., M.M. Fink, S.E. Linn, D.M. Theobald. 2011. Colorado Ownership, Management, and Protection v9 Database. Colorado Natural Heritage Program and Geospatial Centroid, Colorado State University, Fort Collins, CO. (30 September).
    • Mosyakin, S.L. 1995. New taxa of Corispermum L. (Chenopodiaceae), with preliminary comments on the taxonomy of the genus in North America. Novon 5: 340-353.
    • Mosyakin, S.L. 2001. Corispermum. Unpublished 4 Feb. 2001 treatment for Flora of North America, Vol. 4. 14 pp. Online on WWW at
    • Neely, B., S. Panjabi, E. Lane, P. Lewis, C. Dawson, A. Kratz, B. Kurzel, T. Hogan, J. Handwerk, S. Krishnan, J. Neale, and N. Ripley. 2009. Colorado Rare Plant Conservation Strategy, Developed by the Colorado Rare Plant conservation Initiative. The Nature Conservancy, Boulder, Colorado, 117 pp.
    • Rondeau, R., K. Decker, J. Handwerk, J. Siemers, L. Grunau, and C. Pague. 2011. The state of Colorado's biodiversity 2011. Prepared for The Nature Conservancy. Colorado Natural Heritage Program, Colorado State University, Fort Collins, Colorado.
    • USDA, NRCS. 2013. The PLANTS Database. National Plant Data Team, Greensboro, NC 27401-4901 USA.
    • Weber, W. A. and R. C. Wittmann. 2012. Colorado Flora, Eastern Slope, A Field Guide to the Vascular Plants, Fourth Edition. Boulder, Colorado. 555 pp.

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