Rhynchospora
Genus of flowering plants in the sedge family Cyperaceae / From Wikipedia, the free encyclopedia
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Rhynchospora (beak-rush or beak-sedge) is a genus of about 400 species of sedges with a cosmopolitan distribution. The genus includes both annual and perennial species, mostly with erect 3-sided stems and 3-ranked leaves. The achenes bear a beak-like tubercule (hence the name “beak-rush”, although the plants are sedges, not rushes) and are sometimes subtended by bristles. Many of the species are similar in vegetative appearance, and mature fruits are needed to make a positive identification.[1] [2]
Beak-sedge | |
---|---|
Rhynchospora fascicularis | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Clade: | Commelinids |
Order: | Poales |
Family: | Cyperaceae |
Genus: | Rhynchospora Vahl |
Type species | |
Rhynchospora alba (L.) Vahl. | |
Synonyms[1] | |
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The inflorescences (spikelets) are sometimes subtended by bracts which can be leaf-like or showy.[3][4]
Members of this genus have holocentric chromosomes, which is rare in eukaryotes, and have become a model for the study of chromosome evolution. The genomes of Rhynchospora pubera, R. breviuscula, and R. tenuis have been published in 2022.[5]