Weeds of Cyperaceous
are a family of monocotyledonous graminoid flowering plants that known as sedges, which superficially resemble grasses and rushes.
Among published records and revised materials, Carex achenes were identified as those cyperaceous fruits that: (1) were found in unequivocal association with utricles; and/ or displayed (2) utricle remains at the achene base or, when they did not, then did not display any remains of perianth bristles either (as in Eriophorum L., Rhynchospora Vahl, Scirpus L., Trichophorum Pers., among others); (3) have a smooth epidermis (Fig.
The illustration indeed strongly resembles in outline a cyperaceous achene.
aquaticum had high performance and high abundance under field conditions on Oxycarymm cubense (Cyperaceae), this grasshopper did not act as a herbivore of this plant when Eichhornia plants were abundant in the wetlands and only used this cyperaceous
as a refuge during cold seasons (Franceschini et al.
punctatus is usually found calling in lagoons on aquatic grasses, cyperaceous
and floating mats of water hyacinth (Eichhornia crassipes) and floating primrose-willow (Ludwigia peploides).
A preliminary checklist of herbaceous species as reflected in the lack of cyperaceous
species and the report of only three grass species.
Raynal (1971) and Goetghebeur (1998) consider the panicle of spikelets as the basic cyperaceous
inflorescence which can be modified by the contraction of the internodes and various reductional trends.
At maturity, a cyperaceous
stamen consists of a stretched filament and a basifixed, introrse anther with two thecae, each with a longitudinal stomium between the two pollen sacs.