. British plants : their biology and ecology. Plants; Plant ecology. 280 BRITISH PLANTS the plants is heavily laden with salt, and they are therefore halophytes. The most frequent plants are low-growing annuals, which have no power of growing upwards when covered with sand, and this zone is consequently absent where the sand is advancing on the sea. Perennials are very rare, and occur sporadically, for the plants may be uprooted during storms, and only those which produce a large quantity of seed each year, as in annuals, can persist. The most common member of this association is CaJcile marit
. British plants : their biology and ecology. Plants; Plant ecology. 280 BRITISH PLANTS the plants is heavily laden with salt, and they are therefore halophytes. The most frequent plants are low-growing annuals, which have no power of growing upwards when covered with sand, and this zone is consequently absent where the sand is advancing on the sea. Perennials are very rare, and occur sporadically, for the plants may be uprooted during storms, and only those which produce a large quantity of seed each year, as in annuals, can persist. The most common member of this association is CaJcile maritima (sea-rocket), a fleshy-leaved plant belonging to the Wallflower-family. Several plants belonging to the C'henopod-family usually occur—, Sal sol a Kali (salt- wort), with short prickly leaves, Atriplex patvla, Fig. 114.—Car ex arenaria, with Rhizome near Surface of Sand. hastata, A. Babingtonii (oraches), Chenopodium rvbrum. and C. album (goosefoots). Arenaria peploides (sea-purslane) is the only perennial which is found at all constantly in this zone, and then only very sparingly. Above the strand-vegetation the sand is usually The first plant to colonize this drifting sand is Agropyron junceum (sea couch-grass), which possesses long under- ground rhizomes bearing tufts of leaves at intervals. The sand is held at the base of the leaves, and as it increases in amount so the leaves grow upwards, and retain yet more sand. In this way a low embryonic dune is buill up. Carex arenaria (Fig. 114). a plant of similar habit to the sea couch-gr;iss. is sometimes associated with that. <:rass in forming these dunes. When the sand has been. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bevis, James Frederick; Jeffery, Henry John. London : A. Rivers
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectplants
