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Description |
Comm #12051
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Hesperostipa neomexicana Herbaceous Vegetation
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accession code: VB.CC.34118.CEGL001708
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Western Ecology Working Group of... |
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This <i>Hesperostipa neomexicana (= Stipa neomexicana)</i> community occurs on extremely dry and warm sites in the southeastern Colorado Great Plains, along the adjacent Rocky Mountain foothills, and in the San Luis Valley of south-central Colorado. It has been documented on rocky (basalt), steep, southerly slopes at the higher elevations of its range or on any aspect on limestone or shale outcrops at lower elevations. The community is a grassland that is most often heavily dominated by the cool-season, bunchgrass <i>Hesperostipa neomexicana</i>. Good condition stands have abundant <i>Hesperostipa neomexicana</i> with many plants having touching or overlapping canopies. <i>Bouteloua gracilis</i> is nearly always present in this community and is more abundant in degraded stands or on ecotones to finer textured soils. A similar association, the ~<i>Hesperostipa neomexicana</i> Mixed Prairie Herbaceous Vegetation (CEGL001711)$$, occurs in New Mexico but differs in that it is more species-rich and generally not so heavily dominated by <i>Hesperostipa neomexicana</i>. |
Comm #12052
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Senecio triangularis - Mimulus guttatus Herbaceous Vegetation
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accession code: VB.CC.32578.CEGL001988
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Western Ecology Working Group of... |
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This wet forb-dominated herbaceous type occurs in the mountains at upper montane and subalpine elevations. It is commonly associated with moderately steep to steep mid to low slopes usually near seeps, and wet toeslopes. Soils are silty clay loam to sandy and are saturated throughout the growing season. This is a wet herb-rich association. It is usually dominated by forbs; <i>Senecio triangularis</i> is the most consistently present species across all document sites. Common co-associates include <i>Mimulus lewisii, Mimulus guttatus, Mitella pentandra, Platanthera dilatata (= Habenaria dilatata)</i>, and <i>Epilobium</i> spp. Graminoids are also often present and can have individually high cover but are never as abundant as all forb cover combined. Graminoids include <i>Agrostis exarata, Carex paysonis, Deschampsia caespitosa</i>, and <i>Juncus mertensianus</i>. |
Comm #12053
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Hesperostipa neomexicana - Dasylirion wheeleri Herbaceous Vegetation
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accession code: VB.CC.34119.CEGL001710
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Western Ecology Working Group of... |
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From Muldavin et al. (2000b): This is a major community of the southern San Andres Mountains, New Mexico, but is expected to occur throughout most montane areas on White Sands Missile Range. This association typically occurs on steep to very steep colluvial slopes. Aspects are generally cool, and elevations are approximately 1520 to 1980 m (5000-6500 feet). Substrates are limestone and occasionally mixed sedimentary types occurring within the San Andres and Oscura mountains. The type also occurs on interior valley slopes and along mountain escarpments. Overall, the landscape is characterized by steep, rocky, caprock-bounded slopes. Between the rocks, ground surfaces are usually covered with gravel, leaving little exposed soil. Soils are generally shallow and rocky with a loamy matrix. This grassland is characterized by a grass layer dominated by <i>Hesperostipa neomexicana (= Stipa neomexicana)</i> and a strong Chihuahuan shrub component dominated by <i>Dasylirion wheeleri</i>. <i>Aristida purpurea</i> is typically present. Other associated grasses include <i>Bouteloua curtipendula, Bouteloua eriopoda</i>, and <i>Sporobolus cryptandrus</i>. The shrub layer is very open and low-lying with <i>Dalea formosa</i> a constant associate. Diversity is high; other associates include <i>Ephedra aspera (= Ephedra nevadensis var. aspera), Gutierrezia sarothrae, Opuntia phaeacantha, Viguiera stenoloba, Fouquieria splendens, Parthenium incanum, Rhus microphylla</i>, and <i>Yucca baccata</i>. The forb layer is generally scattered, poorly represented and moderate in diversity. Species may include <i>Melampodium leucanthum, Croton</i> spp., <i>Evolvulus nuttallianus</i>, and <i>Astrolepis cochisensis</i>. |
Comm #12054
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Juniperus occidentalis / Artemisia rigida / Poa secunda Wooded Herbaceous Vegetation
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accession code: VB.CC.33610.CEGL001718
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Western Ecology Working Group of... |
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In this association <i>Juniperus occidentalis</i> trees have low cover and are scattered across the landscape and <i>Artemisia rigida</i> cover ranges from 4-15% with low apparentness. However, in poor condition sites <i>Artemisia rigida</i> cover increases to more than 25%. <i>Purshia tridentata</i> occurs occasionally. <i>Poa secunda</i> is the dominant grass. Other common herbs include <i>Festuca idahoensis</i> and <i>Pseudoroegneria spicata</i>. On lower quality sites the non-native grass <i>Bromus tectorum</i> is dominant. This association occurs on substrates of lava, sedimentary and granitic origins in central and northeastern Oregon. |
Comm #12055
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Juniperus occidentalis / Artemisia tridentata / Carex filifolia Wooded Herbaceous Vegetation
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accession code: VB.CC.33577.CEGL001719
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Western Ecology Working Group of... |
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<i>Juniperus occidentalis</i> is the dominant tree in this old-growth, relatively open woodland. There is a shrub-steppe type understory which is dominated by <i>Artemisia tridentata ssp. wyomingensis</i> with <i>Purshia tridentata</i> as an occasional associate. Grasses dominate the forb layer, with <i>Carex filifolia</i> composing more than half of this cover. Other common associates include <i>Pseudoroegneria spicata, Festuca idahoensis, Koeleria macrantha, Elymus elymoides, Eriogonum microthecum</i>, and <i>Tetradymia canescens</i>. Areas in good condition have high cover of mosses, especially under the <i>Juniperus occidentalis</i> trees. Elevation ranges from 1250-1430 m. The community is located on a broad ridgetop to plateau of rolling topography, although most occurrences are on north-facing slopes. Most precipitation occurs as snow, summers are warm and dry with 1-4 months without rain. Soils are sandy-textured and developed in 30-60 cm of aerially deposited pumice over well-cracked Columbia basalt bedrock. |
Comm #12056
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Juniperus occidentalis / Festuca idahoensis Wooded Herbaceous Vegetation
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accession code: VB.CC.33542.CEGL001724
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Western Ecology Working Group of... |
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This wooded grassland association is found in eastern Oregon, Idaho, and possibly Washington and California. Stands occur on northwest-facing slopes between 1300-1400 m elevation. The open tree canopy is dominated by <i>Juniperus occidentalis</i>. No other tree species occurs with constancy. The shrub layer is scant with an average cover value of 1.6%. <i>Purshia tridentata</i> is the most diagnostic shrub due to its constancy and height (1 m). <i>Artemisia tridentata</i> occurs with slightly higher cover values, but it is not as conspicuous with an average height of only 0.5 m. The perennial herbaceous layer averages 15% cover, 10% of which is attributable to <i>Festuca idahoensis</i>. <i>Pseudoroegneria spicata (= Agropyron spicatum), Poa secunda</i>, and <i>Koeleria macrantha (= Koeleria cristata)</i> also occur with 100% constancy but at much lower cover values. |
Comm #12057
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Pseudotsuga menziesii / Linnaea borealis Forest
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accession code: VB.CC.21060.PSEUDOTSUGAMENZ
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Western Ecology Working Group of... |
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Comm #12058
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Rubus idaeus Scree Shrubland
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accession code: VB.CC.23644.RUBUSIDAEUSSCRE
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Western Ecology Working Group of... |
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Comm #12059
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CEGL003709
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accession code: VB.CC.5604.CEGL003709
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EcoArt 2002 |
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Comm #12060
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CEGL003711
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accession code: VB.CC.5605.CEGL003711
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
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