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One fine spring afternoon I sat in my lawn chair at the Bonanza King Mine. Examining a moderate sized shrub I noticed that the primary leaves at some of the nodes were starting to fall off leaving smaller secondary leaves behind. At this node that I sketched, one primary leaf had fallen off, while the other remained. I noticed also that there were new leaves growing at each node.

Article records that use this photograph:

• A Bibliography on Great Basin Blue Sage (Salvia dorrii): 303500.

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The only plants gowing here in the dry spring of 2002 were these small, pitiful Creosote bushes (Larrea tridentats).

Location records that use this photograph:

• Harvard Hill, San Bernardino County, California

Article records that use this photograph:

• Field Notes: 20 Apr 2002.
• U. S. Interstate 15: Harvard Hill.

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Table in DeCandolle (1857), unnumbered page at beginning of document, URL = https://www.biodiversitylibrary.org/item/109211#page/6/

Article records that use this photograph:

• Glossary: .

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The large dark gray bushes in the foreground wash are Desert Almond (Prunus fasciculata), and the smaller yellowish bushes are Sticky Snakeweed (Gutierrezia microcephala). There are Utah Junipers (Juniperus osteosperma) and a few Singleleaf Pinyons (Pinus monophylla) on the slopes above the wash, but no Joshua Trees (Yucca brevifolia) are found at this location on the southeast slope of the Mid Hills.

Article records that use this photograph:

• Wild Horse Canyon Road - Mojave National Preserve: hd. Macedonia Cyn.

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Large rounded outcrops of granite are visible through the Singleleaf Pinyons (Pinus monophylla). In the left foreground is the yellowish green of Green Ephedra (Ephedra viridis), and in the right foreground is the dark green foliage of Waxy Bitterbrush (Purshia tridentata var. glandulosa).

Article records that use this photograph:

• Wild Horse Canyon Road - Mojave National Preserve: along ridgeline.

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General view of vegetation along the Mid Hills ridgeline between Macedonia Canyon and Silver Lead Spring. A few Joshua trees (Yucca brevifolia) grow on the ridgeline and a little to the southwest, but this is the southwestern limit of Joshua trees in the Mid Hills. Columbia Mountain, namesake of the U.S.G.S. quadrangle, can be seen behind the pinyon (Pinus monophylla) on the ridgeline.

Article records that use this photograph:

• Wild Horse Canyon Road - Mojave National Preserve: near ridge line.

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This diagram is drawn from my subjective analysis of the type of vegetation by elevation within the Columbia Mountain quadrangle. Also subjective is the classinfication of vegetation into types. For example, any vegetation that contains Joshua Trees (Yucca brevifolia) is likely to be subjectively classified as Joshua Tree woodland, even though any objective measurement would show that the Joshua Trees formed only a small part of the biomass.

Article records that use this photograph:

• The Vegetation of Lobo Point and North Wild Horse Mesa, Mojave National Preserve, San Bernardino County, California.: 94000.

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Cedar Canyon Road is the upper portion of the elevational gradient studied by Yeaton, et al. (1985). This little valley south of Cedar Canyon Road is at 1525 m elevation, the elevation of the next-to-highest of Yeaton, et al.'s (1985) plots.

Article records that use this photograph:

• Cedar Canyon Road - Mojave National Preserve: in Cedar Canyon.

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Article records that use this photograph:

• Saline Valley Road: in Nelson Range.

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As you can see, this picture was taken in an unusually green Spring. The cactus in the foreground is Buckhorn Cholla (Opuntia acanthocarpa). The large tree-like plants are Mohave Yucca (Yucca schidigera). The smaller shrubs are boxthorns (Lycium sp.), Blackbrush (Coleogyne ramosissima), and Great Basin Blue Sage (Salvia dorrii).

Article records that use this photograph:

• Black Canyon Road - Mojave National Preserve: 38000.

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Article records that use this photograph:

• The Vegetation of Lobo Point and North Wild Horse Mesa, Mojave National Preserve, San Bernardino County, California.: 50800.

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Article records that use this photograph:

• The Vegetation of Lobo Point and North Wild Horse Mesa, Mojave National Preserve, San Bernardino County, California.: 41400.
• Transect 5 in Blackbrush Scrub Near Lobo Point, Mojave National Preserve, California: 14000.

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The large dark gray bushes in the foreground wash are Desert Almond (Prunus fasciculata). There are Utah Junipers (Juniperus osteosperma) and a few Singleleaf Pinyons (Pinus monophylla) on the slopes above the wash, but no Joshua Trees (Yucca brevifolia) are found at this location on the southeast slope of the Mid Hills. Difficult to see in the picture, but nevertheless still there, are numerous Blue Yucca (Yucca Baccata) and Mohave Yucca (Y. schidigera) growing together.

Article records that use this photograph:

• Wild Horse Canyon Road - Mojave National Preserve: hd. Macedonia Cyn.

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I took this photograph from a rim of Peach Springs Tuff, just north of Lobo Point. The road to Lobo Point can just barely be seen in the extreme lower left corner of the photograph. The large green bushes are Utah Junipers (Juniperus osteosperma). The dark gray bushes are Blackbrush (Coleogyne ramosissima). The silvery gray bushes are Salvia dorrii or Salazaria mexicana, and the brownish bushes are California Buckwheat (Eriogonum fasciculatum).

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This diagram is drawn from my subjective analysis of the type of vegetation by elevation within the Columbia Mountain quadrangle. Also subjective is the classinfication of vegetation into types. For example, any vegetation that contains Joshua Trees (Yucca brevifolia) is likely to be subjectively classified as Joshua Tree woodland, even though any objective measurement would show that the Joshua Trees formed only a small part of the biomass.

Article records that use this photograph:

• The Vegetation of Lobo Point and North Wild Horse Mesa, Mojave National Preserve, San Bernardino County, California.: 94000.

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This view looks northwest toward Gold Valley Mine and the Little Thorn Mountains. This is one location in the Eastern Mojave where Blackbrush (Coleogyne ramosissima>) reaches its maximum dominance. Realtive density of Blackbrush is about 70% at this location.

Article records that use this photograph:

• Black Canyon Road - Mojave National Preserve: in Gold Valley.

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