نتایج جستجو برای: cyperaceae
تعداد نتایج: 946 فیلتر نتایج به سال:
Phylogenetic interrelationships among all 18 families of Poales were assessed by cladistic analysis of chloroplast DNA rbcL and atpB sequences from 65 species. There are two well-supported main clades; the graminoid clade with Poaceae (grasses), Anarthriaceae, Centrolepidaceae, Ecdeiocoleaceae, Flagellariaceae, Joinvilleaceae, and Restionaceae; and the cyperoid clade with Cyperaceae, Juncaceae,...
We conducted an in-depth characterization of the range of micro-environments (1 m) in which four Carex species (C. backii, C. communis, C. plantaginea, and C. platyphylla) grow in the understory of an old-growth, deciduous forest in southern Québec, Canada. All four species occurred in significantly different micro-environments. Carex plantaginea was found at the wet end of a moisture gradient,...
BACKGROUND AND AIMS In 1976 the monotypic genus Hellmuthia was placed in the Hypolytreae s.l., but was subsequently ascribed to the Mapanioideae, tribe Chrysitricheae, mainly because of the presence in Hellmuthia of two lateral, mapanioid-like floral scales with ciliated keels, the anatomy of the nutlet, the embryo and the inflorescence. Recently, based on cladistic analyses and supported by po...
[This corrects the article DOI: 10.1371/journal.pone.0166949.].
In recent systematic treatments of the Cyperaceae, spikelets of all but the most primitive tribes have been considered to be indeterminate, whereas historically the number of flowers, floral sex and distribution of sexes in spikelets have been important characters in suprageneric classifications. However, descriptions of these spikelet characteristics for sawgrass, Cladium jamaicense Crantz, va...
در بررسی نمونه های جمع آوری شده از تالابهای واقع در دامنه های شمالی و شرقی کوه های سبلان، نمونه های جالبی از جنس carex جمع آوری شد که از میان آنها، نمونه ای تحت c. diandra تعیین نام گردید که اولین گزارش از گونه مذکور برای ایران تلقی می گردد. علاوه بر این، تعدادی گونه جالب دیگر از این جنس نیز جمع آوری شده است که در مقاله به آنها اشاره شده است. شرح مورفولوژیکی و پراکنش جغرافیایی گونه مذکور در ایر...
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