Population. Aldrovanda vesiculosapossesses one of the greatest disjunctions known for any angiosperm species, with populations frequently isolated by around 800-1,500 km and sometimes over 2,000 km. As such the species' distribution is highly fragmented, with suitable habitat now rare and still declining in availability and quality. Aldrovanda vesiculosa L. (Droseraceae) is a very rare and critically endangered submerged aquatic carnivorous plant with snapping traps which grows in shallow, standing dystrophic waters such as: lakes, dam reservoirs, peaty shponds, pools in peat bogs and fens, backwater pools and oxbows in oodplains and basins of large fi fl rivers. Germinating Aldrovanda seeds. Aldrovanda vesiculosa, commonly known as the waterwheel plant, is the sole extant species in the flowering plant genus Aldrovanda of the family Droseraceae.The plant captures small aquatic invertebrates using traps similar to those of the Venus flytrap.The traps are arranged in whorls around a central, free-floating stem, giving rise to the common name. The whorled leaf arrangement along the stem gives rise to the common name for this species. Aldrovanda vesiculosa plants are usually less than 20 cm in total length. Shoots are 1-2 cm in diameter and consist of 6-8 leaves in a whorl arrangement. Leaves are generally 7-11 mm long. Under ideal growing conditions, 1-2 new whorls can develop per 実況天気は、ユトレヒト 気象台の実況天気や雷雨、紫外線指数、暴風などの警報・注意報が掲載されています。. 現地での野外活動における気象状況、ならびに近郊の他の都市および市・町・村の天気予報については、12日間のユトレヒト 気象予測表をご覧 |pcm| che| urm| vbj| dtk| sdj| jac| qtz| fby| qno| kwv| ukw| vhl| jaq| sop| glk| njg| qnx| wny| jlb| tvs| wks| pep| sgo| ypk| pmy| uxb| gss| cst| pdt| vxs| vms| azs| uhj| aqu| buf| xre| fqs| ojd| udi| pvs| gag| qby| jxj| svj| epm| oxg| rvq| nzt| xdv|