. Vegetation of Oregon and Washington. Botany Oregon Ecology; Botany Washington (State) Ecology. Car ex spec tab His Community Carex spectabilis, a relatively tall (up to 1 meter) Carex, sometimes dominates another meadow type found on relatively mesic litho- sols and rock rubble. Lupinus latifolius is one of the more typical associates. Snowbed Communities Carex nigricans communities typify sites with a short growing season due to persisting snowbanks. Carex nigricans forms a thick dominant cover; typical associates are Juncus drummondii, Antennaria alpina, Epilobium al- pinum var. clavatum,
. Vegetation of Oregon and Washington. Botany Oregon Ecology; Botany Washington (State) Ecology. Car ex spec tab His Community Carex spectabilis, a relatively tall (up to 1 meter) Carex, sometimes dominates another meadow type found on relatively mesic litho- sols and rock rubble. Lupinus latifolius is one of the more typical associates. Snowbed Communities Carex nigricans communities typify sites with a short growing season due to persisting snowbanks. Carex nigricans forms a thick dominant cover; typical associates are Juncus drummondii, Antennaria alpina, Epilobium al- pinum var. clavatum, Polytrichum norvegi- cum, and Polytrichadelphus lyallii. Saxifraga tolmiei and bryophytes dominate rudimen- tary communities growing on sites having an even more prolonged snow cover. Typical constituents are Gymnomitrium varians, Poly- trichum norvegicum, Pohlia nutans, Saxifraga tolmiei, Polytrichum piliferum, and Andreaea nivalis. Streamside Communities The communities found along streams are some of the showiest and most varied mead- ow types (fig. 144). Mimulus lewisii, M. til- ingii, Epilobium latifolium, E. alpinum var. clavatum, Leptarrhena pyrolifolia, Parnassia fimbriata, Caltha biflora, C. leptosepala, Jun- cus drummondii, Petasites frigidus var. nivalis, Philonotis fontana, Drepanocladus aduncus, and Erigeron peregrinus are some characteris- tic species. At various locations in the Cascade Range, Mimulus lewisii, Caltha spp., Leptar- rhena, or Epilobium latifolium may function as dominants. In the Olympic Mountains, Saussurea americana is a dominant. An Erio- phorum angustifolium-Sphagnum aquatilis community is characteristic of sites affected by a high water table the year around. Other Community Types There are many other kinds of subalpine communities. Grass-dominated communities occur generally on some of the warmer, drier slopes, particularly in rain-shadow areas; these. Figure 144. — Mimulus lewisii-Epilobium latifolium community typical of the sh
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