Vauquelinia californica subsp. sonorensis |
Vauquelinia californica subsp. pauciflora |
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Sonora rosewood |
Arizona rosewood |
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Young stems | densely white-tomentulose, becoming canescent. |
loosely tomentulose, tardily glabrescent. |
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 (1.5–)4–16(–22) mm; blade green or yellow-green, lanceolate or oblong-lanceolate to elliptic or oblong-elliptic, sometimes oblong-ovate, (2.2–)3–7.5(–9) × (0.6–)0.8–1.4(–2) cm, surfaces glabrate or puberulent along midveins. |
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 1.5–2.5 × 2.5–3.3 mm, exterior puberulent, interior glabrate; sepals 1.1–2.2 × 1.4–2 mm, abaxially puberulent to glabrate; petals 3.4–5.4 × 2.4–3.4 mm; filaments (2.5–)3–6 mm. |
Capsules | 5–6 × 3.5–4 mm. |
(4.5–)5–6 × 3.5–4(–4.5) mm. |
Seeds | 3.5–4 × 0.9–1.2 mm. |
3.8–5 × 1.1–1.4 mm. |
Corymbs | 1.5–4.5 × 2–6.5 cm, villous to tomentulose. |
1.5–5 × 1.7–7 cm, puberulent to glabrate. |
Vauquelinia californica subsp. sonorensis |
Vauquelinia californica subsp. pauciflora |
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Phenology | Flowering spring. | Flowering spring. |
Habitat | Canyon margins and hillsides of the Sonoran Desert | Limestone substrates in arid chaparral-desert scrub |
Elevation | 700–1500 m (2300–4900 ft) | 1400–2300 m (4600–7500 ft) |
Distribution |
AZ; Mexico (Baja California) |
AZ; NM; Mexico (Chihuahua, Coahuila, Durango) |
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 pauciflora is known from Cochise County, Arizona, and Hidalgo County, New Mexico. These plants have relatively small (to 5.5 mm) and thickened leaves with short petioles (to 7 mm), and small inflorescences. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 431. | FNA vol. 9, p. 431. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | V. pauciflora | |
Name authority | W. J. Hess & Henrickson: Sida 12: 130, figs. 11a–c. (1987) | (Standley) W. J. Hess & Henrickson: Sida 12: 135. (1987) |
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