in A. von Humboldt et al., Nov. Gen. Sp. 6(fol.): 183
plate 559. 1824
w, sc United States, Mexico.
Species 8 (4 in the flora).
Within Cercocarpus, nuclear DNA sequences and chloroplast DNA regions have been analyzed (B. D. Vanden Heuvel 2002) with support demonstrated for four clades: (1) C. betuloides clade, including all the varieties of C. betuloides; (2) C. ledifolius clade, including three varieties of C. ledifolius; (3) C. montanus clade, including C. breviflorus and C. montanus; and (4) a clade including C. fothergilloides and other Mexican species. The data sets do not resolve the relationships among individual species or varieties within the four clades.
Cercocarpus species are heteroblastic, with new growth occurring in favorable seasons via long shoots, but with most leaves produced on flower-bearing short shoots. All but one species, C. montanus, are evergreen. Long-shoot leaves are larger than short-shoot leaves. Short-shoot leaves are variable in size with the proximal smallest, more ovate, the later-formed larger, often more oblong-obovate. Plants of mesic sites typically have larger, thinner leaves than those of more xeric sites, often with variation present within a mountain range; this is not considered taxonomically important. The small leaves of drier sites are more coriaceous and thicker; the veins have bundle sheath extensions, and the stomata are in depressions. Variation also occurs in vestiture within most taxa, with some plants sericeous-strigose or with hairs ascending to wavy (more or less villous) or erect, other plants having thicker, coiled hairs. These vestiture types may be geographically distributed (and useful taxonomically) or mixed within a population. Short shoots may develop few to many flowers in a cluster; this can be a useful character or be modified by the environment and result in exceptions.
|1||Leaf blades linear, linear-lanceolate, lanceolate, lance-elliptic, or elliptic-ovate, (l/w = 2.5–10), stiffly coriaceous, margins entire, weakly to strongly revolute; anthers glabrous.||Cercocarpus ledifolius|
|1||Leaf blades usually ovate to broadly ovate, oblong-elliptic, oblong-obovate, or obovate to narrowly obovate, sometimes oblanceolate to narrowly oblanceolate, oblong-oblanceolate, rhombic, or suborbiculate, rarely lance-ovate, (l/w = 1–3), membranous, subcoriaceous, or coriaceous, margins serrulate, serrate, dentate, or crenate sometimes in distal 1/5–3/4, revolute or flat; anthers hirsute||> 2|
|2||Leaves winter-deciduous, blades ± subcoriaceous (not stiff), ovate to broadly ovate, obovate to narrowly oblong-obovate, or oblanceolate, margins dentate to crenate or serrate (proximal teeth with convex margins, distal teeth smaller, more crowded); Arizona, Colorado, sw Idaho, w Nebraska, se Nevada, New Mexico, w South Dakota, w Oklahoma, nw Texas, Utah, e to s Wyoming.||Cercocarpus montanus|
|2||Leaves persistent or drought-deciduous, blades membranous or subcoriaceous to coriaceous, oblong-obovate, rhombic, oblong-elliptic, ovate to broadly ovate, suborbiculate, narrowly oblanceolate, oblong-lanceolate, or narrowly obovate to obovate, rarely lance-ovate, margins dentate, serrulate, serrate, crenate (teeth apiculate), or entire in some C. betuloides var. traskiae; Arizona, California, New Mexico, Oregon, w Texas||> 3|
|3||Stipules (1.5–)3.5–6(–10) mm (1.5–2.5 mm in s California); achene styles: proximal setae 2.7–5 mm; flowering late Feb–Apr(–May); sw, sc Arizona, California, Oregon.||Cercocarpus betuloides|
|3||Stipules 1.5–2.5(–3) mm; achene styles: proximal setae 1.5–2.7 mm; flowering late Jun–Aug(–Sep); nc Arizona, New Mexico, Texas.||Cercocarpus breviflorus|
|Author||James Henrickson + and Brian D. Vanden Heuvel +|
|Authority||Kunth in A. von Humboldt et al. +|
|Common name||Mountain-mahogany +|
|Distribution||w +, sc United States + and Mexico. +|
|Etymology||Greek kerkos, tail, and karpos, fruit +|
|Illustration copyright||Flora of North America Association +|
|Illustrator||Marjorie C. Leggitt +|
|Publication title||in A. von Humboldt et al., Nov. Gen. Sp. + and plate +|
|Publication year||1824 +|
|Reference||lis1992a +, martin1950a +, rydberg1913a + and vanden2002a +|
|Source xml||https://email@example.com/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V9/V9 545.xml +|
|Taxon family||Rosaceae +|
|Taxon name||Cercocarpus +|
|Taxon parent||Rosaceae tribe Dryadeae +|
|Taxon rank||genus +|
|Volume||Volume 9 +|