Congest spikerush (Eleocharis congesta)

Congest spikerush (Eleocharis congesta) is a species of plant in the Cyperaceae, herbaceous in the form of a thick, erect, dark green reed, 10-25 cm high, 1-2 mm thick, cylindrical, smooth and shiny. Spikelet inflorescences at the tip of the reed, brown, 1-9 mm long, 1-3 cm wide and many flowers.

E. congesta grows in swamps, shallow lakes and rice fields at an elevation of 5-2500 meters, is resistant to brackish water, resistant to flooding and resistant to drought. This species forms dense colonies and covers surfaces.

TAXON

Kingdom: Plantae
Phylum: Tracheophyta
Subphylum: Angiospermae
Class: Liliopsida
Order: Poales
Family: Cyperaceae
Subfamily: Cyperoideae
Tribe: Eleocharideae
Genus: Eleocharis R.Br. in Prodr. Fl. Nov. Holland.: 224 (1810)
Species: Eleocharis congesta D.Don in Prodr. Fl. Nepal.: 41 (1825)
Variety: Eleocharis congesta var. congesta, Eleocharis congesta var. japonica (Miq.) T.Koyama, Eleocharis congesta var. thermalis (Hultén) T.Koyama

HOMOTYPIC SYNONYMS

Scirpus congestus (D.Don) Buch.-Ham. ex D.Don in Prodr. Fl. Nepal.: 41 (1825)

PUBLICATIONS

Chang, C.S., Kim, H. & Chang, K.S. (2014). Provisional checklist of vascular plants for the Korea peninsula flora (KPF): 1-660. DESIGNPOST.

Dar, G.H. & Govaerts, R.H.A. (2025). Flora of Kashmir Himalaya: Sind Valley 1: 1-606. Bishen Singh Mahendra Pal Singh, Dehradun, India.

Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.

Govaerts, R. (2004). World Checklist of Monocotyledons Database in ACCESS: 1-54382. The Board of Trustees of the Royal Botanic Gardens, Kew.

Iwatsuki, K., Boufford, D.E. & Ohba, H. (eds.) (2020). Flora of Japan IVa: 1-430. Kodansha Ltd., Tokyo.

Kotiya, A., Solanki, Y. & Reddy, G.V. (2020). Flora of Rajasthan: 1-769. Rajasthan state biodiversity board.

Pasha, M.K. & Uddin, S.B. (2013). Dictionary of plant names of Bangladesh, Vasc. Pl.: 1-434. Janokalyan Prokashani, Chittagong, Bangladesh.

Sarmah, K.K. & Borthakur, S.K. (2009). A checklist of angiospermic plants of Manas national park in Assam, India. Pleione 3: 190-200.

Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.

VERNACULAR NAME

English: Congest spikerush, Purun
Indonesian: Purun
Java: Purun

Aryo Bandoro
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