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Photo is of parent taxon

Sonora rosewood

Photo is of parent taxon

Arizona rosewood

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

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
from FNA
AZ; Mexico (Baja California)
[BONAP county map]
from FNA
AZ; NM; Mexico (Chihuahua, Coahuila, Durango)
[BONAP county map]
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 Rosaceae > subfam. Amygdaloideae > tribe Maleae > Vauquelinia > Vauquelinia californica Rosaceae > subfam. Amygdaloideae > tribe Maleae > Vauquelinia > Vauquelinia californica
Sibling taxa
V. californica subsp. californica, V. californica subsp. pauciflora
V. californica subsp. californica, V. californica subsp. sonorensis
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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