Name:
Hesperocyparis sargentii - Hesperocyparis macnabiana - Hesperocyparis bakeri Woodland Alliance
Reference:
NatureServe Biotics 2019
Description:
This alliance consists of woodlands dominated by <i>Hesperocyparis macnabiana, Hesperocyparis sargentii</i>, and <i>Hesperocyparis bakeri</i>, with <i>Calocedrus decurrens, Pinus sabiniana, Quercus douglasii, Quercus wislizeni</i>, or <i>Umbellularia californica</i>. Serpentine indicators include <i>Garrya congdonii, Quercus durata</i>, and <i>Frangula californica ssp. tomentella</i>. <i>Hesperocyparis macnabiana</i> and <i>Hesperocyparis sargentii</i> are known to occur together and hybridize in some instances. Common associates include <i>Heteromeles arbutifolia, Adenostoma fasciculatum</i>, and the California endemics <i>Arctostaphylos viscida ssp. pulchella</i> and <i>Ceanothus jepsonii</i>. In some settings <i>Arctostaphylos hookeri ssp. montana, Styrax redivivus</i>, or <i>Cercocarpus montanus var. glaber</i> can be common. Common grasses and forbs can include <i>Melica torreyana, Festuca idahoensis, Iris</i> spp., and locally endemic serpentine forbs (<i>Aquilegia eximia, Senecio</i> spp. and others). Structurally, these are woodlands in character, but in some cases the conifers might be stunted. This alliance is often found on steep upper slopes and ridges. Soils are generally sterile or very nutrient deficient, thin, dry and rocky, derived ultramafic (gabbro, peridotite, serpentinite) or volcanic substrates. This alliance occurs in Mediterranean California in the northern and central Coast Ranges, the Klamath-Siskiyou mountains, northern Sierra Nevada, Modoc Plateau, and southern Cascades of Oregon. These woodlands are highly variable and spotty in distribution, and the composition of individual stands can be very diverse, especially the shrubs (often individual species have low cover).
Accession Code:
urn:lsid:vegbank.org:commConcept:38642-{282E853A-0064-4D60-ACDB-C52E21ACA116}
Plot-observations of this Community Concept:
0
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