Potamogeton crispus Linnaeus (1753:126)

Abbasi, Shabnam, Afsharzadeh, Saeed, Dinarvand, Mehri & Wiegleb, Gerhard, 2017, Synopsis of Potamogetonaceae in Iran with supplements to the Flora Iranica and a new identification key, Phytotaxa 311 (1), pp. 1-21 : 8-9

Potamogeton crispus Linnaeus (1753:126) , Fig. 8

Perennial, growing aseasonally, rhizome slender, stem slender, compressed, bicanaliculate. Leaves monomorphic; submersed leaves 20–100 mm long, 4–18 mm wide, margins serrate, undulate, rounded at apex, cuneate at base, 3(–5)- veined; stipules not fused, 6–7 mm long, membranaceous. Spike 10–15 mm long, peduncle 30–45 mm long; as thick as stem. Tepals 1–1.5 mm long, anthers 1 mm long. Carpels 4, fruits 5 mm long, with prominent beak. Stele of oblong type, endodermis of O-type, interlacunar bundles absent, subepidermal bundles absent.

Worldwide distribution: —Subcosmopolitan; Europe, Africa, W Asia ( Turkey, Afghanistan, Pakistan, Palestine), N, C and E Asia, North and S South America. Australia, introduced to New Zealand.

Distribution in Iran: —North, West, Northeast, South.

Flowering time: —From spring to summer.

Specimen examined:— IRAN. Mazandaran: Azbaran , 100 m, 29 Aug 2015, Abbasi & Afsharzadeh 20206 ( HUI!) ; Siahrood , 62 m, 12 Aug 2014, Abbasi & Afsharzadeh 20217 ( HUI!) ; Gilan: Astara, Stil wetland, 0 m, 16 June 2008, Dinarvand 8235 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; West Azerbaijan: Dalamper fall, 2000 m, 11 Sep 2013, Bagheri 20204 ( HUI!) ; Miandoab , 1000 m, 8 Aug 2015, Abbasi & Afsharzadeh 20205 ( HUI!) ; Ghazvin: Ovan lake , 100 m, 25 Aug 2015, Naseri 20207 ( HUI!) ; Kurdistan: Marivan, Zaribar lake, 1300 m, 15 July 2008, Dinarvand 8299 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Khorasan: Khaf, 1250 m, 20 July 2008, Dinarvand 21137 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Kermanshah: Gharehsoo lake , 1000 m, 7 June 2015, Abbasi & Afsharzadeh 20209 ( HUI!) ; Hashilan wetland, 1320 m, 10 July 2010, Dinarvand 52316 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Khuzestan: Shush, Karkhe Naderi bridge, 100 m, 20 June 2008, Dinarvand 8104 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Dezful, Hamidabad, 140 m, 20 June 2008, Dinarvand 8340 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Khoramshahr, under bridge, 500 m, 20 June 2010, Dinarvand 8028 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) .

Figures

FIGURE 8. P. crispus a. cross section of stem (Scale bar: 100 μm, objective lens 4), b. morphological shape.