Cyperus rotundus - Flora of Qatar

Chlorocyperus rotundus, Chlorocyperus salaamensis, Cyperus agrestis, Cyperus arabicus, Cyperus badius, Cyperus bicolor, Cyperus bifax, Cyperus bulbosostoloniferus, Cyperus comosus, Cyperus disruptus, Cyperus elongatus, Cyperus herbicavus, Cyperus hexastachyos, Cyperus hildra, Cyperus hydra, Cyperus inconspicuus, Cyperus laevissimus, Cyperus leptostachyus, Cyperus longus, Cyperus merkeri, Cyperus micreilema, Cyperus nubicus, Cyperus ochreoides, Cyperus officinalis, Cyperus oliganthus, Cyperus olivaris, Cyperus pallescens, Cyperus patulus, Cyperus platystachys, Cyperus procerulus, Cyperus proteinolepis, Cyperus pseudovariegatus, Cyperus purpureovariegatus, Cyperus radicosus, Cyperus retzii, Cyperus rubicundus, Cyperus rudioi, Cyperus stoloniferus, Cyperus taylorii, Cyperus tenuifolius, Cyperus tetrastachyos, Cyperus tuberosus, Cyperus viridis, Cyperus weinlandii, Cyperus yoshinagae, Pycreus rotundus, Schoenus tuberosus

Common names

Coco-grass, Java grass, Khmer kravanh chruk, nut grass, purple nut sedge, red nut sedge, Saed

Extract from Wikipedia article

Cyperus rotundus (coco-grass, Java grass, nut grass, purple nut sedge, red nut sedge, Khmer kravanh chruk) is a species of sedge (Cyperaceae) native to Africa, southern and central Europe (north to France and Austria), and southern Asia. The word cyperus derives from the Greek κύπερος, kyperos, and rotundus is from Latin, meaning "round". The earliest attested form of the word cyperus is the Mycenaean Greek ��, ku-pa-ro, written in Linear B syllabic script.[+]

Cyperus rotundus is a perennial plant, that may reach a height of up to 140 cm (55 inches). The names "nut grass" and "nut sedge" – shared with the related species Cyperus esculentus – are derived from its tubers, that somewhat resemble nuts, although botanically they have nothing to do with nuts.

As in other Cyperaceae, the leaves sprout in ranks of three from the base of the plant, around 5–20 cm long. The flower stems have a triangular cross-section. The flower is bisexual and has three stamina and a three-stigma carpel, with the flower head having 3-8 unequal rays. The fruit is a three-angled achene.

The root system of a young plant initially forms white, fleshy rhizomes, up to 25 mm in dimension, in chains. Some rhizomes grow upward in the soil, then form a bulb-like structure from which new shoots and roots grow, and from the new roots, new rhizomes grow. Other rhizomes grow horizontally or downward, and form dark reddish-brown tubers or chains of tubers.

It prefers dry conditions, but will tolerate moist soils, it often grows in wastelands and in crop fields.

AI-generated Description

Cyperus rotundus, also known as purple nutsedge, is a perennial grass-like sedge native to Africa and Eurasia. It has been naturalized in many parts of the world, including Qatar. In Qatar, Cyperus rotundus is a common invasive weed found in various habitats, including roadsides, agricultural fields, and urban areas. Studies have shown that it can outcompete native vegetation and alter ecosystem processes. Notably, research conducted in Qatar has highlighted the plant's ability to tolerate high temperatures, drought, and saline conditions, making it well adapted to the country's arid environment. Additionally, its extensive root system allows it to access water deep in the soil, enabling it to thrive in areas with limited water availability. Overall, Cyperus rotundus is a highly invasive and resilient species in Qatar, posing challenges for ecosystem management and conservation efforts.

AI-generated summary of observations

Observations of Cyperus rotundus in Qatar have shown that the plant can be found in various locations throughout the country. It has been spotted near Ezdan Hotel in West Bay, Doha, as well as at the entrance of Film City in Ras Abrouq Peninsula near Zekreet. The plant has also been found in Onanza area near West Bay and in Al Shamal City Park in Ruwais, Northern Qatar. Additionally, it has been observed growing on lawns and in parks, such as Dahl Al Hamam Park at Al Markhiya Street in Doha. The observations were made over a period of time, from August 2014 to May 2016, indicating that the plant is present in Qatar throughout the year. The plant's ability to grow in different environments and locations suggests that it is adaptable and widespread in Qatar.

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Acknowledgements

QNHG (Qatar Natural History Group) and associated people, for a possibility to participate in their field excursions and to learn about local nature.

Cyperus rotundus L.

Synonyms