| 词条 | Lipandra |
| 释义 |
| image = Chenopodium polyspermum leaves and flowers 1 AB.jpg | image_caption = Manyseed goosefoot (Lipandra polysperma) | regnum = Plantae | unranked_divisio = Angiosperms | unranked_classis = Eudicots | unranked_ordo = Core eudicots | ordo = Caryophyllales | familia = Amaranthaceae | subfamilia = Chenopodioideae | tribus = Atripliceae | genus = Lipandra | genus_authority = Moq. | species = L. polysperma |binomial = Lipandra polysperma |binomial_authority = (L.) S. Fuentes, Uotila & Borsch | synonyms =
}} Lipandra polysperma (Syn. Chenopodium polyspermum), common name manyseed goosefoot,[1] is the only species of the monotypic plant genus Lipandra from the subfamily Chenopodioideae in the Amaranthaceae family. DescriptionLipandra polysperma is a non-aromatic, glabrous annual herb. The stems grow erect to ascending or prostrate and are branched with usually alternate, basally sometimes nearly opposite branches. The alternate leaves consist of a petiole and a simple blade. The leaf blade is thin, ovate-elliptic, with entire margins. The inflorescences consist of loose dichasia in the axils of leaf-like bracts, sometimes of more condensed glomerules of flowers arranged spicately. The flowers are bisexual or pistillate, with (4-) 5 nearly free perianth segments, 1-3 (-5) stamens and an ovary with 2 stigmas. In fruit, perianth segments remain unchanged. The fruit has a membranous pericarp, which is free from the seed. The horizontally orientated seeds are compressed-globose. The brown to blackish seed coat is undulately striate.[2] DistributionLipandra polysperma is distributed in most regions of Europe and in temperate Asia.[3] It is widely naturalized elsewhere, as in North America.[4]SystematicsThe species was first described in 1753 by Carl Linnaeus as Chenopodium polyspermum in Species Plantarum.[5] After phylogenetic research, Fuentes-Bazan et al. (2012) separated this species from genus Chenopodium that would otherwise have been polyphyletic. The genus Lipandra was first described by Alfred Moquin-Tandon in 1840 (in Chenopodearum monographica enumeratio, p. 19.), replacing an older illegitimate name: Christian Friedrich Lessing's genus Oligandra (1835, not the Asteraceae genus Oligandra from 1832) had only one species, Oligandra atriplicoides, that was soon considered identical with Chenopodium polyspermum.[2] Lipandra polysperma belongs to the same tribe as Chenopodium, Tribus Atripliceae.[2]Synonyms of genus Lipandra Moq.:[2]
ReferencesExternal links{{Commons category|Lipandra polysperma}}{{Wikispecies|Lipandra polysperma}}
2 : Amaranthaceae|Monotypic Caryophyllales genera |
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