Vauquelinia californica subsp. sonorensis |
Vauquelinia californica subsp. californica |
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Sonora rosewood |
Arizona rosewood |
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Young stems | densely white-tomentulose, becoming canescent. |
initially tomentulose, becoming canescent or tardily glabrate. |
Leaves | petiole (4–)6–16(–22) mm; blade bicolor, abaxially white, adaxially green and nonlustrous, linear to linear-lanceolate, (2.5–)5–11(–15) × (0.6–)0.7–1.2(–1.4) cm, surfaces villous-tomentulose, soon or tardily glabrescent except for hairy midveins. |
petiole (4–)7–15(–26) mm; blade bicolor, abaxially white, adaxially green and lustrous, lanceolate to oblong-lanceolate or narrowly elliptic, (3.5–)4–9(–15) × (0.7–)1–2(–3.2) cm, surfaces initially villous-tomentulose, abaxially usually sparsely white-puberulent, hairs slightly coiled, sometimes glabrate or glabrous, adaxially mostly glabrate or glabrous. |
Flowers | hypanthium 2–2.5 × 3–3.5 mm, exterior white villous-tomentulose, interior glabrous except at base; sepals 1.3–1.8 × 1.6–2 mm, villous-tomentulose; petals 4–5 × 2.4–3 mm; filaments 3–5 mm. |
hypanthium 2–2.5(–3) × 2–3.7(–4.5) mm, exterior tomentulose or tardily glabrate, interior glabrous; sepals 1.4–2.1 × 1.5–2.3 mm, puberulent-villous; petals 4–5 × 2.5–3.5 mm; filaments 3–5.5 mm. |
Capsules | 5–6 × 3.5–4 mm. |
5–6.5 × 3.5–4.5 mm. |
Seeds | 3.5–4 × 0.9–1.2 mm. |
4–5 × 1.2–1.3 mm. |
Corymbs | 1.5–4.5 × 2–6.5 cm, villous to tomentulose. |
3–5(–12) × 3–8(–13) cm. |
2n | = 30. |
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Vauquelinia californica subsp. sonorensis |
Vauquelinia californica subsp. californica |
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Phenology | Flowering spring. | Flowering spring. |
Habitat | Canyon margins and hillsides of the Sonoran Desert | Limestone and granite substrates, shrublands of upper Sonoran Desert from above desert plains to lower pinyon-juniper zones |
Elevation | 700–1500 m (2300–4900 ft) | 700–1800 m (2300–5900 ft) |
Distribution |
AZ; Mexico (Baja California) |
AZ; Mexico (Baja California, Baja California Sur) |
Discussion | Subspecies sonorensis is known from the Ajo Mountains in Pima County. Some plants from the Baboquivari Mountains of Pima County have somewhat similar narrow leaves but lack the dense vestiture on stems, inflorescences, and abaxial leaf surfaces. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies californica shows considerable variation among populations, particularly with regard to vestiture, leaf size and shape, petiole length, and number of marginal teeth. Often populations within the same mountain ranges in Arizona share the same pattern of variation. Most of the populations have distinctly bicolor leaves, at least when young, or abaxially become weakly puberulent and persistently, closely tomentulose to canescent with tightly coiled hairs. The name Vauquelinia torreyi S. Watson, which is illegitimate, pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 431. | FNA vol. 9, p. 430. |
Parent taxa | ||
Sibling taxa | ||
Name authority | W. J. Hess & Henrickson: Sida 12: 130, figs. 11a–c. (1987) | unknown |
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