Isoetes welwitschii A.Br. ex Kuhn

Corm 3-lobed; leaves 10-20, very slender, with awl-shaped apex, pale green, opaque, firm in texture, 3-7.5 cm long, about 0-5 mm diam., rounded on the back, somewhat channelled down the face, furnished with stomata and strengthening fibres; sporangia small, globose; velum absent; megaspores white, with fairly large, scattered tubercles on the basal face and smaller ones over the apical faces; microspores granulated.