Nissenan Manzanita

Note: the georeference coordinates do not appear on the specimen itself, but were added afterwards, and are inaccurate; the correct coordinates are given as determined from Google Earth

Note: the georeference coordinates do not appear on the specimen itself, but were added afterwards, and are inaccurate; the correct coordinates are given as determined from Google Earth

Note: the georeference coordinates do not appear on the specimen itself, but were added afterwards, and are inaccurate; the correct coordinates are given as determined from Google Earth

Note: the georeference coordinates do not appear on the specimen itself, but were added afterwards, and are inaccurate; the correct coordinates are given as determined from Google Earth

This is a wide sweep of A. nissenana, forming the dominant low shrub cover at this location.

Arctostaphylos nissenana, showing typical development, 1.5 to 2 feet, on the poorer sites. Note type of soil present, which is characteristic of the range of this species: rock formation is Mariposa slate, with very little or scarecely any top soil. Head of Martinez Creek, south of Diamond Springs., T 10 N R 11 E Sec 31 Quad name: Placerville. Quad number: 56. Reference to map: 27.

Development of Arctostaphylos nissenana reached on the better sites where the soil is deeper. Height 6 feet ( Rule at 3 feet). The form of the bush is typical of all types of development of the species. Head of Martinez Creek, south of Diamond Springs., T 10 N R 11 E Sec 31 Quad name: Placerville. Quad number: 56. Reference to map: 27.

Detail of branching and stem characteristics of Arctostaphylos nissenana. Trunk branches close to the ground level but does not develop a woody platform. Stems with black, shreddy bark, the outer layers of which may be removed with ease. Head of Martinez Creek, south of Diamond Springs., T 10 N R 11 E Sec 31 Quad name: Placerville. Quad number: 56. Reference to map: 27.

Chaparral type of Arctostaphylos nissenana growing in pure stand, this characteristic of the species. Average development, 2-3.5 feet (Rule at 3 feet), in center of picture, poorer development and more open stand on shallower soil in background. Seedlings in fire-killed area in foreground. Snag is Digger pine. Head of Martinez creek, south of Diamond Springs., T 10 N R 11 E Sec 31 Quad name: Placerville. Quad number: 56. Reference to map: 27.

General view of pure Arctostaphylos nissenana stand, showing areas killed outright by July 1931 fire. Seedlings of same species coming in on burned areas. Nontimber site. Head of Martinez Creek, south of Diamond Springs., T 10 N R 11 E Sec 31 Quad name: Placerville. Quad number: 56. Reference to map: 28.

Arctostaphylos nissenana killed outright by July 1931 fire. Where soil is very shallow the only growth consists of A. nissenana seedlings; on the better sites, in addition to these seedlings, there is an occasional Dendromecon rigida and, in some areas, a rather profuse growth of Polygala cornuta and Hypericum concinnum. (Rule at 3 feet). Head of Martinez Creek, south of Diamond Springs., T 10 N R 11 E Sec 31 Quad name: Placerville. Quad number: 56. Reference to map: 28.

Pure stand of Arctostaphylos nissenana in foreground and Knobcone pine on middle slope; both nontimber sites. Soil very shallow of Mariposa slate origin. Ponderosa pine and Black oak (site Index 1150) in background. Looking E, 2 miles W. from Volcanoeville., T 13 N R 10 E Sec 13 Quad name: Placerville. Quad number: 56. Reference to map: 24.

Knobcone pine-Arctostaphylos nissenana mosaic type. Nontimber site on shallow soil area of Maripose slate origin. Ponderosa pine ( SI 150) in background. Looking W, 2 miles W from Volcanoeville., T 13 N R 10 E Sec 13 Quad name: Placerville. Quad number: 56. Reference to map: 22.