Jamesia

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Ordo: Cornales

Familia: Hydrangeaceae
Subfamilia: Jamesioideae
Genus: Jamesia
Species: J. americana – J. tetrapetala
Name

Jamesia Torr. & A.Gray, Fl. N. Amer. 1(4): 593. (1840) nom. cons.

Type species: Jamesia americana Torr. & A.Gray

Synonyms

Homotypic
Edwinia A.Heller, Bull. Torrey Bot. Club 24: 477. (1897) nom. superfl.

Homonyms

Jamesia Nees vide Stephanomeria Nutt. (Asteraceae)
Jamesia Raf. vide Dalea L. (Fabaceae)

References
Primary references

Torrey, J. & Gray, A. 1838–1840. A Flora of North America containing abridged Descriptions of all the known indigenous and naturalized Plants growing North of Mexico; arranged according to the Natural System, Vol. 1. 740 pp. Wiley & Putnam, New-York. BHL Reference page. : 1(4): 593.

Links

Govaerts, R. et al. 2021. Jamesia in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2021 July 7. Reference page.
International Plant Names Index. 2021. Jamesia. Published online. Accessed: July 7 2021.
USDA, ARS, Germplasm Resources Information Network. Jamesia (Hydrangeaceae) in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Jamesia is a genus of shrubs in the Hydrangeaceae, most commonly known as Jamesia, cliffbush or waxflower. It is native to interior western North America, in the U.S. states of Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming, growing in mountains at 1600–3000 m altitude.

There are just two species in the genus, Jamesia americana, and Jamesia tetrapetala.[1]

It is a shrub growing to 1–2 m tall and to 3 m or more broad, with opposite simple leaves 3–7 cm long and 2–5 cm broad, with a serrated margin and a crinkled surface. The flowers are produced in erect terminal panicles, each flower white, 15–20 mm diameter, with five (rarely four) petals. The fruit is a dry capsule with numerous small seeds.

The genus is named in honor of Edwin James, the botanist on Stephen Long's expedition in 1820 that explored the territory between the Platte and Arkansas Rivers. James was the first to collect this genus for botanical study.[2]
Notes

Holmgren & Holmgren (1989)

Fertig, USDA

References
Fertig, Walter. "Cliff Jamesia (Jamesia americana)". USDA Forest Service.
Holmgren, Noel H.; Holmgren, Patricia K. (1989). "A Taxonomic Study of Jamesia (Hydrangeaceae)". Brittonia. 41 (4): 335–350. doi:10.2307/2807545. JSTOR 2807545. S2CID 44553697.
"Jamesia". The Plant List. 2013.