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Utah Fendler-bush, Utah fendlerella, yerba desierto

Stems

to 10 dm.

Twigs

reddish to orangish, strigose.

Leaves

petiole 0.1–0.3 mm, pilose in axils;

blade 5–20(–25) × 1–5(–6.5) mm, base cuneate to rounded, apex obtuse to acute, abaxial surface glabrate or strigose to tomentose, adaxial glabrate or strigose.

Inflorescences

congested to open, bracteate;

peduncle 2–10 mm, strigose.

Pedicels

0.8–3(–4.5) mm, strigose.

Flowers

hypanthium 0.5–2 × 0.9–1.2 mm;

sepals 0.8–2.2 × 0.2–0.6 mm;

petals 2–4 × 0.8–1.2 mm, margins erose;

filaments 1.2–3 × 0.2–0.4 mm, those opposite sepals longer than those opposite petals;

anthers 0.2–0.5 mm.

Capsules

4–6.1 × 1.5–1.9 mm.

Seeds

2–3 mm.

Fendlerella utahensis

Phenology Flowering Apr–Jun (Aug–Sep).
Habitat Cracks and crevices, usually in limestone, sometimes sandstone, outcrops, sandy soils of mixed desert scrub, pine communities.
Elevation 1200–2800 m. (3900–9200 ft.)
Distribution
from FNA
AZ; CA; CO; NM; NV; TX; UT; Mexico (Chihuahua, Nuevo León)
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[BONAP county map]
Discussion

Some plants in the southern range of Fendlerella utahensis (southern Arizona, southern New Mexico, trans-Pecos Texas, and northern Mexico) have leaves that average narrower, longer, and more acute than leaves on plants to the north. These have been recognized as var. cymosa. Intergradation is common; the variety is not recognized here.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 12, p. 469.
Parent taxa Hydrangeaceae > Fendlerella
Synonyms Whipplea utahensis, F. utahensis var. cymosa
Name authority (S. Watson) A. Heller: Bull. Torrey Bot. Club 25: 626. (1898)
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