[taxon report][distribution map][all photos][line drawing]
Scientific Name: Cymopterus spellenbergii R.L. Hartman & J.E. Larson
Vernacular Name: Taos springparsley
R-E-D Code: 1-1-3
Description: Taprooted, acaulescent, tufted, herbaceous perennial; leaves 1 or more times pinnately compound, ovate or broadly ovoid in outline, 2-6 cm wide, 4-8 cm long, glabrous or minutely scabrous on margins, petioles 110 cm long, leaflets sessile, filiform to narrowly linear, ascending, 0.5-7 cm long, often opposite on rachis; inflorescences 15(11+) per plant, peduncles (4)740 cm long, glabrous except sparsely to moderately puberulent at apex with minute peg-like hairs appearing glandular, each peduncle terminated by a convex to globose congested umbel, 23.5 cm wide, involucre absent, rays 624, 38 mm long, lengthening slightly in fruit, umbellets of 4-13 flowers, involucel of 57 linear, entire bractlets, 13 mm long,
pedicels 11.5 mm long, to 3 mm long in fruit; flowers yellow, fading to pale yellow or white, sepals 0.20.4 mm long, petals 11.2 mm long; fruits tan, terete to somewhat dorsally compressed, broadly ovoid to oblong, not constricted at commissure, 4.85.2 mm long, 2.72.8 mm wide on commissure, dorsal wings straight, smooth, prominently corky, edges acute to rounded, wedge-shaped to truncate-ovate in cross section, 0.5 mm wide at base, 0.60.8 mm tall, the lateral ones often the tallest; mericarps with commissure planar to curved adaxially from the two ends, often with central groove or even cupulate due to enlargement of wings, oil tubes 1 per interval, 2 on commissure, forming ribbons about 0.3 mm wide. Flowers late April to late May; fruits mid May to early July.
Similar Species: Cymopterus sessiliflorus is vegetatively almost identical, but has fruits with membranous wings. All other species of Apiaceae in New Mexico with linear leaflets have at least 1 or 2 stem leaves.
Distribution: New Mexico, Rio Arriba and Taos counties.
Habitat: This plant usually grows among basalt boulders that cover much of the Taos Plateau and form caprock along canyons rims. It occasionally grows in soils derived from metamorphic rock or in sandy draws. The plant community is open piρon-juniper woodland or Douglas fir-ponderosa pine forest at elevations of 1,890-2,680 m (6,200-8,800 ft).
Remarks: This species is named for Richard Spellenberg of New Mexico State University who discovered it in 1978 and sent it to Ronald Hartman at the University of Wyoming for identification. Formal recognition was delayed until enough material could be collected to fully understand its variation and distribution. It was included in Cymopterus sessiliflorus in the past. Cymopterus sessiliflorus occurs to the west of C. spellenbergii and is disjunct by about 35 miles.
Conservation Considerations: This species does not appear to be threatened by the prevailing land uses within its habitat.
Important Literature (*Illustration):
Hartman, R.L. 2006. New combinations in the genus Cymopterus (Apiaceae) of the southwestern United States. Sida 22(2):955-957.
*Hartman, R.L. and J.E. Larson. 2011. Cymopterus spellenbergii (Apiaceae), a new species from north central New Mexico, U.S.A. Journal of the Botanical Research Institute of Texas 5(1):33-40.
Information Compiled By:
Charlie McDonald, 2012