Eastern Mojave Vegetation Harvey Monroe Hall Natural Area, Mono County, California.


See also: Mount Conness. Slate Creek.

See also: Slate Creek Basin. Slate Creek Valley. Timberline Station.

Full Size Image Full Size Image

Dr. H. M. Hall of the Carnegie Institution proposed that this research area be set aside in 1931. Forester R. Y. Stuart approved the classification as a Natural Area on January 6, 1933. The Forest Service and the Carnegie Institution executed an unprecedented Cooperative Agreement permitting the Institution to conduct scientific research including allowed changes in soil and vegetation cover ans structures, improvement and installations "required in the conduct of research." Under the agreement, the Carnegie Institution, based at their Timberline Experiment Station in the HRNA, conducted research there until 1971 or 1972. Principal research focused on genecology, using transplant experiments to analyze morphological changes in plant species grown at several elevations and latitudes. Some of the major California botanists cooperated in research at Timberline, notably the "Big Three," Jens C. Clausen, William H. Hiesey, and David D. Keck.

The HRNA encompasses about 3,883 acres (1571 ha) of alpine and subalpine plant communities on the crest of the Sierra Nevada, adjacent to Yosemite National Park. The area lies completely within the precipitous eastern escarpment of the range with a vertical relief od 2790 ft (850 m), from about 9800 ft (2987 m) at Slate Creek to 12,590 ft (3837 m) on the summit of Mt. Conness.

The HRNA is underlain by granitic and metamorphic rock: the substrate of the western two-thirds consists of Half Dome Quartz Monzonite and Cathedral Peak Quartz Monzonite and the eastern third is a complex of metamorphosed sedimentary and volcanic rocks of the Paleozoic Gull Lake Roof Pendant and Mesozoic Ritter Range Roof Pendant.

For plant collections made int the Harvey Monroe Hall Natural Area, see "Slate Creek Valley."

Latitude: 37.9602018 Longitude: -119.2984892 (° decimal)
Elevation: 10364ft, 3159m.

Articles that refer to this location:


Literature Referring To This Location:

Area Plant Lists that contain this location:

Species collected at or near this location:


Pinus contorta Loudon murrayana (Grev. & Balf.) Critchf. Sierra Lodgepole Pine



Packera werneriifolia (A. Gray) W. A. Weber & Á. Löve. Hoary Groundsel

Senecio integerrimus Nutt. exaltatus (Nutt.) Cronquist. Columbia Ragwort


Hackelia micrantha (Eastw.) J. L. Gentry. Jessica Sticktight


Arctostaphylos nevadensis A. Gray. Pinemat Manzanita


Lewisia nevadensis (A. Gray) B. L. Rob. Nevada Lewisia


Epilobium minutum Lindl. Minute Willow Herb

Epilobium obcordatum A. Gray. Rockfringe

Epilobium oregonense Hausskn. Oregon Spike Primrose


Pedicularis attollens A. Gray. Little Elephant's Head


Polemonium pulcherrimum Hook.



Koeleria macrantha (Ledeb.) Schult. Prairie Junegrass

Phleum alpinum L. Alpine Timothy


Muhlenbergia filiformis (Thurb. ex S. Watson) Rydb. Pullup Muhly


Festuca brachyphylla Schult. & Schult. f. Alpine Fescue

Festuca brachyphylla Schult. & Schult. f. breviculmis Fred. Alpine Fescue

Poa cusickii Vasey cusickii. Cusick's Bluegrass


Elymus sierrae Gould.

Total number of taxa: 18
Native Taxa:
(serif, italic, bold)
Exotic Taxa:
(sans-serif, italic)
Nativity Undetermined:
(default font, italic)
Listed Weeds:
Indentified as Weed
If you have a question or a comment you may write to me at: tas4@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address.  

A, B, C, D, E, F, G, H, I, J, K, L, M,
N, O, P, Q, R, S, T, U, V, W, X, Y, Z

[Home Page] [Site Map]

Date and time this article was prepared:8:23:57 PM, 10/15/2020.