 Photo ©
Carl Farmer |
Rare in alkaline lochs Leaves on main stem c 7-20 cm long. Skye ID: Leaves of only one kind, not separated into submerged and floating. Leaves c 3-6 x as long as wide, with a short point, or extension of the midrib, at tip. In the axil of each leaf is a stiff, pale green, yellowish or reddish stipule, about 40% as long as the leaf, with two conspicuous ribs or keels. All leaves have a short stalk about 1-12 mm long, with the blade of the leaf often decurrent onto the stalk so that it's hard to say where the stalk ends. Other features: Leaves wavy-edged. On either side of the midrib there are about 2 prominent veins and outside those another 2 or so fainter ones. Joining these lengthwise veins there are thinner but still very conspicuous cross-veins, which are at an angle of about 60-80° to the main veins, both near the midrib and near the edge (in many pondweeds, they are almost horizontal near the edge but strongly ascending near the middle). Fruit-spike thickening upwards. |
