Stuckenia amblyophylla (C.A.Meyer) Holub

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 : 16-17

Stuckenia amblyophylla (C.A.Meyer) Holub (199: 364), Fig. 18

Potamogeton amblyophyllus Meyer (1849: 10)

Perennial, rhizome filiform, stem slender to filiform, terete. Leaves submersed, narrowly linear, 10–30 mm long, 0.5–1 mm wide, 3-veined, obtuse or rounded at apex, straight at base, stipules 80– 20 mm long, brownish, adnate to mm to leaf. Spike 2–4 mm long, peduncle 40–70 mm long, as thick as the stem. Tepals 1.5 mm long, anthers 1mm long. Carpels 4, fruits 2.9–3.3 mm long. Stele of four bundles type, endodermis of U-type, interlacunar bundles present, subepidermal bundles absent.

This species is mainly distinguished from S. filiformis (Persoon) Boerner (1912b: 713) by the larger fruits and the robust shape.

Worldwide distribution: —W ( Turkey, Afghanistan) and C Asia.

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

Flowering time: —From spring to summer.

Specimen examined:— IRAN. Mazandaran: Valasht lake, 1700 m, 18 May 2009, Dinarvand s.n. (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Gilan: Kiashahr, 1800 m, 18 July 2009, Dinarvand 8153 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; West Azerbaijan: Uromieh, Seldoz wetland, 1300 m, 23 June 2009, Dinarvand 8310 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Lorestan: Gahar lake, 2300 m, 15 July 2009, Dinarvand 8759 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Isfahan: Delijan, 952 m, 23 July 2010, Dinarvand 28886 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Zayandeh rud, 1000 m, 10 August 1986, Adeli 1332 ( LMO!), Boushehr: Helleh river, 24 m, 15 June 2009, Dinarvand 8691 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Khuzestan: Ahvaz: Seyed Khalaf village , 18 m, 18 Apr 2009 Dinarvand 8262 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Shushtar, 65 m, Gotvand to Aghili, 22 May 2008, Dinarvand 8130 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Mandaly Tjunction, 18 m, 18 Apr 2009, Dinarvand 8130 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Karoon river, 18 m, 18 Apr 2009, Dinarvand 8262 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Shush, Karkheh, 127 m, 18 Apr 2009, Dinarvand 8034 (Herbarium of the Research Center of Agriculture & Natural Resources of Khuzestan!) ; Fars: Polberenjeh, Shiraz , 1400 m, 10 Aug 1986, Adeli 1331 ( LMO!) .

Figures

FIGURE 18. S. amblyophylla a. cross section of stem (Scale bar: 100 μm, objective lens 4), b. morphological shape.