Rosa woodsii subsp. puberulenta

(Rydberg) W. H. Lewis & Ertter

Novon 20: 48. 2010.

Common names: Plateau rose
Endemic
Basionym: Rosa puberulenta Rydberg Fl. Rocky Mts., 443, 1062. 1917
Synonyms: R. chrysocarpa Rydberg R. neomexicana Cockerell
Treatment appears in FNA Volume 9. Treatment on page 108. Mentioned on page 106.

Shrubs, 10–25+ dm. Stems openly branched; prickles usually present on distal stems and branches, infrastipular usually falcate, sometimes erect, declined, or introrse, usually subulate, 3–10 mm, internodal usually sparse or absent. Terminal leaflets usually broadly elliptic, 20–40 mm. Inflorescences 1 or 2(–5)-flowered. Sepals: abaxial surfaces eglandular, rarely sessile-glandular.


Phenology: Flowering May–Jul.
Habitat: Edges of streams, flats, riparian woodlands dominated by cottonwood and pine
Elevation: 1300–2400 m

Distribution

V9 157-distribution-map.jpg

Ariz., Colo., Nev., N.Mex., Utah, Wyo.

Discussion

Subspecies puberulenta is the predominant Rosa occurring on bottomlands throughout the Colorado Plateau, extending at least as far as Lincoln and White counties, Nevada. Populations with comparable morphology that occur in northeastern California, Idaho, southeastern Oregon, and southeastern Washington might also belong here. The distribution of subsp. puberulenta overlaps those of all five other subspecies of R. woodsii. Diagnostic features include riparian habitat, relatively tall open habit, relatively prominent curved, declined, or introrse infrastipular prickles, and eglandular sepals.

Selected References

None.

Lower Taxa

None.
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
(Rydberg) W. H. Lewis & Ertter +
Rosa puberulenta +
Plateau rose +
Ariz. +, Colo. +, Nev. +, N.Mex. +, Utah +  and Wyo. +
1300–2400 m +
Edges of streams, flats, riparian woodlands dominated by cottonwood and pine +
Flowering May–Jul. +
R. chrysocarpa +  and R. neomexicana +
Rosa woodsii subsp. puberulenta +
Rosa woodsii +
subspecies +