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Damasonium
''Damasonium'' is a genus of six species of flowering plants in the family Alismataceae, commonly known as starfruit and by the older name thrumwort. The genus has a subcosmopolitan but very patchy distribution.Germplasm Resources Information Network''Damasonium''/ref>Flora of NW Europe''Damasonium''/ref>Flora of North America''Damasonium''/ref> They are aquatic perennial herbaceous plants growing in shallow water or mud beside ponds. The leaves are all basal, floating, or aerial in plants on pond margins. The flowers are hermaphrodite, in one to many whorls, in umbels, racemes or panicles; they have six stamens, and six to nine carpels arranged in a whorl, connate at the base, each with two to many ventral ovules; The styles are terminal. The fruit is a whorl of follicles; the follicles are laterally compressed, stellately radiating, with a more or less elongated apical beak. Taxonomy The genus was first described by Philip Miller in 1754. No type species was designated. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Damasonium Alisma
''Damasonium alisma'' is a species of flowering marsh plant known by the common name of starfruit. Its native range includes parts of Great Britain, France, Portugal, Spain, Italy, Greece, Russia, Ukraine, Moldova, and Kazakhstan. ''Damasonium alisma'' is native to the British Isles and was at one time commonly found in south and central England. Numbers have declined as a result of the loss of pond habitats. It was not recorded in the wild in 2006 and is classified as endangered within the United Kingdom. Seeds from the (extinct) Headley Heath population were germinated in undisturbed ponds managed by Surrey Wildlife Trust in 2013, and have grown there each year since (at least up to 2018). Ecology ''Damasonium alisma'' grows in acidic ponds. In Great Britain it went into decline along with the village pond. It once grew in many English counties from Sussex north to Shropshire, but by 1900 was reduced to two ponds in Buckinghamshire and one in Surrey. It is gradually star ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |