ABSTRACT
FIG. 2. — 1, MARSILEA DISTORTA, habit; 2, M. BOTRYOCARPA, habit; 3, M. MINUTA var. MINUTA, base of stipe with sporocarps; 4, M. FADENIANA, base of stipe with sporocarps; 5, M. MEGALOMANICA, habit. 1 from Leprieur s.n.; 2 from Drummond & Hemsley 4211; 3 from Robson 947; 4 from type; 5 from type. 1-3 drawn by D. Erasmus, 4-5 drawn by V. Goaman.
sparsely pilose, with pellucid streaks of various lengths between the nerves; sides usually straight; outer margins round, usually entire, occasionally crenulate or bilobate. Pedicels free from each other, rather slender, wiry, often filiform, flexible, straight or more often gently curved upwards, 5-15(–25) mm long, usually glabrous. Sporocarps solitary, very rarely somewhat crowded, subcircular to broadly elliptic in outline, lemon-shaped in dorso-ventral cross-section, 2-3.8(–4) mm long, 1.5-2.5(–2.7) mm wide, up to 1.75 mm thick, always distinctly bordered all round, with the lateral walls conspicuously bulging when fully mature, appressed pilose when young, soon becoming glabrous; lateral ribs almost always visible (more prominent in young specimens); lateral veins (as seen on the interior surface) not anastomosing; raphe distinct, often short, covering 1/2-2/3 the length of the sporocarp base, usually broadened and often forming a ridged collar-like structure; teeth both prominent, the sinus between them somewhat elongate and shallow, the inferior obtuse, usually downwardly pointed, the superior broadly conical, obtuse to subacute or sometimes acute, straight or pointed downwards. Sori (6-)8-12. Fig. 1.5 (page 4).
KENYA. Teita District: Tsavo National Park (East), Aruba to Sala Gate Road, 9 km towards Aruba from signpost 106, 7 Jan. 1972, R.B. & A.J. Faden 72/26! & Aruba to Ndara road, 1.2 km W of signpost 153, 14 Jan. 1972 Faden et al. 72/76! & Aruba-Buchuma road, 1.7 km from signpost 153 towards Aruba, 22 Jan. 1972, R.B. & A.J. Faden 72/83!
