REE NAIADACEH (Bennett). 45 
R. eum (Hook. f. in Bot. Mag. t. 6399); tubers hemispherical, about 
the size es a hazel nut; stem subacute obtusely trigonous, or semite wi 
rounded angles ; leaves erect, flexuose, 6-10 in. long, elongate-subulate ; scapes 
usually shorter than the leaves  exlindre; Np forked, with 
flowers curved on the spadix, on e plants all female, on others he ermaphrodite, 
rarely all male ; — 2, inreat, cp or ‘oblong ota, obscurely 3-nerved ; 
stamens 6-8; ca s 3-8; vules about 4 ach carpel; fruit teipantian, 
tumi 
mid. A, s tees. var., @. Meyer in Finite <x. 21s £ qunceum, Herb. 
Zeyher, teste Hooker f. 
Coast Re@ion: Var. B, Uitenhage Div., Zeyher, 1734! British Kaffraria, 
Cooper, 465! 
ENTRAL REGION: er fai 4500 ft. Eta Colesberg Div.; “on the 
dais mountain near the 3 Grave,” Burchell, 2688! Var. B, apna 
Div. ; between the aa Baas and Klein Beaten Hoogte, 2000-2500 ft. 
2 
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KALAHARI REGION: e y { Var. B, 
Basutoland, Bowker! Transvaal ; se op at Trigards Fontein, Eehmann, 
6692! wre ~— Laer a no Sanderson ! 
Easte REG Gri — d East ; peste near Kokstad, Lares 4206! 
VareucA, ag Nii te wie: robe ear Baxoia, 2200 ft., Baur, 579! Natal; 
Biggarsberg and Umeinyate "hives, 3000~—4000 ft., Sutherland ! Gohieak. 
600 ft., Wood, 1611 
9. A. estiifetinis (Lehm ex Steud. Nomen. ed. 2, i. 114, 
only) ; “spike bifid ; bracts ric Nite , diaphanous ; nerves ‘bifid ; leaves 
mostly capillary ; flowers 6-andr Dr, Pappe in Herod. Brit. 
Pr Reeton: Cape Flats in tes 8 places, oe ! No specimen at 
e 
The leaves in this are shire oe slender for the genus, and the material is too 
poor for a better description 
III. POTAMOGETON, Linn. 
Perianth-segments 4, green, valvate. Anthers 4, sessile, didymous. 
Carpels 4 (many abortive), sessile, with one cell, and one ovule ; 
ovules campylotropous. Stigma persistent, subsessile or decurrent, 
altering much in position in ripening; drupelets small, variable in 
shape and contour, coriaceous. Seed subreniform ; radicle ene 
peduneles at the base in a membranous sate, sisdition eg 
Species 60-70, a a 
*With amy coriaceous lea 
athe sheds stems snoaaentely stout ; submerged 
peat few or none. 
eaves eMente at t the base; stipules acute (1) natans. 
Leaves not plicate at the base ; “akg obtuse. : 
Leaves in aidag. A ~ pee nds .. (2) fiuitans. 
ruit sry tapering _ the style (3) americanus. 
Fruit dorsally subtrun t the top (4) Bichardii. 
Bers ebecleds stems filiform ; vabane aed leaves ; : 
(5) javanicus. 
Fruit wal 1 keel ; stems moderately stout ; sub- ; 
é leaves abundant... 0... sss ws,~—«((6)s lpinum. 
