Annual or perennial herbs, usually most abundant in wet places. Culms usually triangular, usually solid. Leaves: alternate, usually 3-ranked, simple, grass-like or reduced to sheaths; sheath usually closed; ligule usually 0; lamina usually linear or setaceous.

In this paper we describe the pollen characteristics, mainly grain shape and aperture type, of representatives of each New Zealand Cyperaceae genus. Twelve distinct groups are defined, and a key is provided to assist with their identification, usually either to a genus or to a group of genera described as a particular type.

Oct 9, 2024 · Pollen grains of Cyperaceae are semi-angular, sub-angular and angular in shapes in polar view and prolate, pear shaped, spheroidal and prolate-spheroidal in equatorial view. Pollen apertures were mostly sunken, and few raised.

Both the Cyperaceae and the Juncaceae have pollen that is dispersed as tetrads, although in the Cyperaceae three of the four nuclei produced by meiosis degenerate to leave only one functional nucleus in the tetrad. Both families also have tristichous phyllotaxy (leaves in three ranks).

Dec 22, 2009 · Abundances of Cyperaceae pollen decreased substantially between 12 700 and 11 000 cal. yr BP, while Trilites spores increased. All of this evidence reveals a spell of cold climate conditions that can be correlated to the Younger Dryas stadial in the North Atlantic realm.

Nov 1, 2022 · Our results show that the modern pollen assemblages of Qinghai Lake are mainly dominated by Artemisia, Cyperaceae, Poaceae, and Chenopodiaceae, with similar pollen assemblages across the lake, while pollen concentrations show a significant enrichment towards the sedimentary centres of the lake.

Cyperaceae species are widely distributed with the centers of diversity for the group occurring in tropical Asia and tropical South America. While sedges grow in almost all environments, many thrive in wetlands or in poor soils.

Pollen of 23 species of Cyperaceae collected from diferent areas of Pakistan were examined to evaluate the palynological data under light microscopy (LM) and scanning electron microscopy (SEM).

Several authors have recognized different pollen types in Cyperaceae mainly based on pollen shape, pollen size, and number and type of apertures.

May 8, 2021 · Goetghebeur′s seminal work on Cyperaceae published in 1998 provided the most recent complete classification at tribal and generic level, based on a morphological study of Cyperaceae inflorescence, spikelet, flower, and embryo characters, plus …