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Cyperus papyrus
L.
Family:
Cyperaceae
Papyrus Flat Sedge
John Samuel
FNA
Resources
Gordon C. Tucker*, Brian G. Marcks* & J. Richard Carter * in Flora of North America (vol. 23)
Herbs, perennial, rhizomatous, stout. Culms roundly trigonous, 300-500 cm × 15-45 mm, glabrous. Leaves bladeless. Inflorescences: spikes loosely cylindric, 10-20 × 6-10 mm; rays 40-100, drooping or arching, slender, 10-30 cm; 2d order rays 8-20 cm; bracts 4-10, ± erect, V-shaped, 3-8 cm × 4-15 mm; 2d order bracts 2-5, (1.5-4-16 cm × 0.5-2 mm; rachilla persistent, separating laterally, remaining firmly attached basally, wings 0.3-0.4 mm wide. Spikelets 6-30, slightly compressed, linear, ± quadrangular, 6-10 × 0.8-1 mm; floral scales 6-16, reddish beside 5-ribbed green medial part, white to hyaline near margins, ovate-elliptic, 1.8-2.2 × 1.2-1.5 mm, apex acute to obtuse. Flowers: anthers 0.8-1 mm (connectives prolonged beyond anther as red subulate appendage 0.2-0.5 mm, apex usually setose); styles 0.2-0.4 mm; stigmas 0.8-1.2 mm. Achenes pale brown, sessile, oblong, 0.8-1 × 0.4 mm, apex scarcely apiculate, surfaces puncticulate.
Fruiting summer. Stream banks, marshes; 0-30 m; introduced; Fla.; s Europe; sw Asia; Africa.
Cyperus papyrus is conspicuous in the field by its great height, leafless culm, and open, hemispheric inflorescence with drooping rays.
Ancient Egyptians, Greeks, and Romans prepared paper from the pith of the culms of Cyperus papyrus, which is abundant along the Nile River.
Open Interactive Map
Susan Novak
Sanne Roemen Roemen
John Samuel
ecololo
sarahemcc
Anne Barber
Jerry Oldenettel
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
University of Florida Herbarium
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Development supported by National Science Foundation Grants (
DBI 9983132
,
BRC 0237418
,
DBI 0743827
,
DBI 0847966
)
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