Name:
Scaevola sericea - Sida fallax / Fimbristylis spp. Coastal Strand Group
Reference:
NatureServe Biotics 2019
Description:
This group occurs along the coasts of the Hawaiian Islands including the smaller, arid islands and atolls that are widespread in the northwestern Hawaiian Islands. Vegetation varies largely with substrate and rainfall. Dry, leeward coast stands tend to be sparse and patchy and include succulent herbs, low wind-sheared shrubs, grasslands, mixtures of drier shrub and grasses or taller shrublands. The wetter, windward coasts of larger islands are more often vegetated with mesic-wet graminoids and shrubs with scattered trees. However, there is considerable overlap of ubiquitous and mesic coastal species. Dry strand species include graminoids <i>Fimbristylis cymosa, Eragrostis variabilis, Sporobolus virginicus</i>, forbs <i>Boerhavia acutifolia, Boerhavia repens, Nama sandwicense, Sesuvium portulacastrum</i>, and shrubs <i>Chamaesyce celastroides, Chenopodium oahuense, Gossypium tomentosum, Heliotropium anomalum, Jacquemontia ovalifolia ssp. sandwicensis, Lipochaeta</i> spp., <i>Myoporum sandwicense, Scaevola coriacea, Scaevola sericea, Sida fallax, Tetramolopium rockii, Tribulus cistoides</i>, and <i>Vitex rotundifolia</i>. Characteristic species of the wet strand are <i>Deschampsia nubigena, Machaerina angustifolia, Pilea peploides, Scleria testacea, Selaginella arbuscula, Thelypteris interrupta</i>, and <i>Wikstroemia oahuensis</i>. Species characteristic of mesic or seasonally moist strand are <i>Artemisia australis, Bacopa monnieri, Bidens hillebrandiana, Bidens molokaiensis, Chenopodium oahuense, Cyperus javanicus, Cyperus phleoides, Diospyros sandwicensis, Eragrostis variabilis, Ischaemum byrone, Lipochaeta succulenta, Lysimachia mauritiana, Osteomeles anthyllidifolia, Pandanus tectorius, Plectranthus parviflorus, Sadleria cyatheoides, Schiedea globosa</i>, and <i>Solanum americanum</i>. Stands are restricted to the shoreline and the zone immediately back of it where sites are strongly influenced by surf, wind and salt spray. Elevation is generally below 30 m. Sites may be rocky shorelines or sandy beaches, some with adjacent dunes or low alkaline flats above the saturated zone and behind the high-tide mark. Annual precipitation ranges from over 3500 mm for wet strand, down to 1200 mm on seasonally mesic sites, and less than 1200 mm for dry strand. Substrates are variable, ranging from sandy beaches to cobbly shores, derived from volcanic tuff, recent lava flows or old disintegrating lava (basalt), or raised coral beds (limestone), some with adjacent dunes or low alkaline flats above the saturated zone and behind the high-tide mark.
Accession Code:
urn:lsid:vegbank.org:commConcept:40151-{443B8832-655C-44C3-BD20-D673AD43FC5C}
Plot-observations of this Community Concept:
0
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