Columbiadoria

Subshrubs 30–60 cm; taproots stout, bases woody, branched. Stems strictly erect, mostly simple, glabrous or glabrate to hirtellous. Leaves basal (usually not persistent) and cauline; alternate; sessile; blades oblanceolate, gradually reduced distally, margins entire, 1-nerved (net-nerved), sparsely scabroso-hispidulous, eglandular or obscurely gland-dotted, not resinous. Heads radiate, in racemiform or loosely spiciform to loosely corymbiform arrays. Involucres cylindro-turbinate, 8–11 × 5–6 mm. Phyllaries 35–40 in 5–6 series, 1-nerved (not evident; convex, not keeled or only slightly so on distal 1/2), lanceolate, unequal, proximal 2/3 white-indurate, margins herbaceous, convex, midnerves not evident (apices green), glabrous. Receptacles flat, smooth, epaleate. Ray florets 5–8, pistillate, fertile; corollas yellow (weakly if at all coiling). Disc florets 15–25, bisexual, fertile; corollas yellow, tubes shorter than narrowly funnelform throats, lobes 5, erect, deltate; style-branch appendages linear-lanceolate (5–6 times longer than stigmatic lines, papillate distally). Cypselae narrowly oblong, slightly compressed, 8-nerved, moderately strigose; pappi persistent, of 40–50, tan, barbellate, attenuate bristles in 1 series.

Distribution

nw United States.

Discussion

Species 1.

Possibly, Columbiadoria is a member of the Petradoria group (Solidagininae), although it lacks the characteristic linear-lanceolate, parallel-nerveed leaves of those species (G. L. Nesom 1991f).

Selected References

Nesom, G. L. 1991f. Redefinition of Hesperodoria (Asteraceae: Astereae) and the segregation of Columbiadoria, a new monotypic genus from the western United States. Phytologia 71: 244–251.

Lower Taxa

Columbiadoria hallii