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Cyperus compressus, commonly known as annual sedge, is a sedge of the family Cyperaceae that has a wide distribution throughout countries with warmer climates. It is found in tropical areas of Africa, Asia and the Americas. [2] In Europe it is commonly known as hedgehog sedge and the French know it as souchet comprimé.
They are annual or perennial plants, mostly aquatic and growing in still or slow-moving water up to 0.5 metres (20 in) deep. The species vary greatly in size, with small species only 5 centimetres (2 in) tall, while others can reach 5 metres (16 ft) in height. Common names include papyrus sedges, flatsedges, nutsedges, umbrella-sedges and ...
The annual or perennial sedge has a slender tufted habit. It has smooth trigonous or triquetrous shaped culms that are typically 10 to 35 cm (3.9 to 13.8 in) in height with a diameter of 0.8 to 2 mm (0.031 to 0.079 in) diameter. [2] The septate to nodulose leaves are shorter than the culms and have a width of about 4.5 mm (0.18 in).
The Cyperaceae (/ ˌ s aɪ p ə ˈ r eɪ s i. iː,-ˌ aɪ /) are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges.The family is large; botanists have described some 5,500 known species in about 90 genera [3] [4] – the largest being the "true sedges" (genus Carex), [5] [6] with over 2,000 species.
The annual sedge typically grows to a height of 2.5 to 15 centimetres (0.98 to 5.91 in) and has a tufted habit. In Australia it blooms between February and August producing green-yellow-brown flowers. [4] The plant has a slender root system.
Cyperus rotundus is a perennial plant, that may reach a height of up to 140 cm (55 in).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.
Cyperus polystachyos, also known as Pycreus polystachyos, and also called manyspike flatsedge in the US, [3] or bunchy sedge, [4] [5] coast flatsedge, many-spiked sedge or Texas sedge in Australia, [5] is a herbaceous species in the family Cyperaceae, widespread in tropical and subtropical areas around the world, sometimes extending its range into temperate regions.
Cyperus nervulosus is a sedge of the family Cyperaceae that is native to Australia. [1] The annual sedge typically grows to a height of 0.03 to 0.2 metres (0.10 to 0.66 ft) and has a tufted habit. It blooms between February and July and produces green-brown flowers. [1]