Isoetes Isoetes, A. Braun

9. I. velata A. Braun View in CoL in Bory & Durieu, Expl. Sci. Alger. Bot. 1: 19, t. 37, f. 1 (1850)

(/. variabilis Le Grand, I. baetica Willk. ).

Amphibious; stem 3-lobed. Leaves 8-24 cm, erect, yellow-green, firm, tapering to apex; stomata present; membranous margin at base more than 1 mm wide, extending up leaf for of its length; leaf-bases usually persisting, forming a ‘ bulb’ of brown, papery scales; ligule triangular-ovate. Sporangium almost or completely covered by velum; megaspores 420-580/z, with scattered large and small tubercles; microspores red-brown, with short spines. Shallow lake-margins. Iberian peninsula and W. Mediterranean region. BI Co Ga Hs It Lu Sa Si.

I. tegulana Genn ., Comment. Soc. Crit. Ital. 1: 42 (1861) (/. velata var. tegulensis (Genn.) Fiori ), from Sardegna, has leaves 20-30 cm, very slender, with basal margin less than 1 mm wide and microspores often crested. It needs further investigation.