Name:
Baccharis pilularis / Polystichum munitum Shrubland
Reference:
NatureServe Biotics 2019
Description:
This shrubland association is currently only known from Point Reyes National Seashore in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. Stands are found at low elevations on north-facing slopes (19-25°) and on the middle to entire sides of slopes. Soil textures range from medium to very fine sandy loam to moderately coarse sandy loam of granitic origin. These stands are currently unknown off of granitic substrate. This association appears to have the capacity to develop following regrowth of <i>Baccharis pilularis</i> stands after clearing of north-facing exposures for pasture. Some stands near Drakes Estero were cleared in the early part of this century. It is likely that this association may further proceed without disturbance to ~<i>Baccharis pilularis - Holodiscus discolor</i> Shrubland (CEGL003192)$$ or ~<i>Baccharis pilularis - Frangula californica - Rubus parviflorus</i> Shrubland (CEGL003191)$$, depending on microclimate and geographic location. Stands of this shrubland form an open herb layer and an intermittent shrub layer 1-2 m tall. The overall affect is a dense two-tiered shrubland with <i>Baccharis pilularis</i> forming the dominant overstory and <i>Polystichum munitum</i> the dominant understory. Also present in this association are <i>Agrostis pallens, Erechtites minimus, Pteridium aquilinum, Stachys ajugoides, Holodiscus discolor, Iris douglasiana, Toxicodendron diversilobum, Rubus parviflorus, Rubus ursinus, Maianthemum stellatum, Heracleum maximum, Holcus lanatus, Marah fabaceus, Clinopodium douglasii</i>, and <i>Scrophularia californica</i>. Other species that may be present are <i>Calamagrostis nutkaensis, Mahonia pinnata, Galium californicum, Frangula californica</i>, and <i>Elymus californicus</i>. These stands are often adjacent to other <i>Baccharis pilularis</i> associations such as ~<i>Baccharis pilularis - Toxicodendron diversilobum</i> Shrubland (CEGL003197)$$ (on adjacent west- or east-facing slopes), ~<i>Baccharis pilularis - Artemisia californica</i> Shrubland (CEGL003184)$$ (on south-facing slopes), or ~<i>Baccharis pilularis - Ceanothus thyrsiflorus</i> Shrubland (CEGL003186)$$ (on neutral slopes). On adjacent bottomland, <i>Salix lasiolepis, Rubus spectabilis, Salix lasiolepis / Rubus</i> sp., and <i>Alnus rubra / Sambucus racemosa</i> associations may occur.
Accession Code:
urn:lsid:vegbank.org:commConcept:32078-{8BF8539A-F99E-473C-899A-54252DC1AF4D}
Plot-observations of this Community Concept:
0
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