216 CLiii. NAIADACE.E (bennett). [Triglockwi. 



490 ; A. Bennett in Dyer, FI. Cap. vii. 42 ; Rendle in Cat. Afr. PL 

 Welw. ii. 93. T. Barrelieri, Loisl. Fl. Gall. ed. 2, i. 264. 



lao-wer Guinea. Angola : Huilla ; plentiful in boggy pastures and on the 

 banks of the river at LopoUo and near Ohai, Welwitsch, 3017 ! 



Also in North and South Africa. 



2. T. Striatum, Ruiz <C- Pav. Fl. Peruv. iii. 72. Rootstock small, 

 stoloniferous. Leaves variable, narrowly linear to subulate, striate, 

 generally stouter than the scape. Scape leafless, 3-12 in. tall ; flowers 

 many, shortly pedicelled. Carpels 3, orbicular, with 6 permanent ribs, 

 about 1-1 J lin. long. — Micheli in DC. Monogr. Phan. iii. 101 ; Buchen. 

 in Engl. Jahrb. ii. 510; Durand & Schinz, Conspect. Fl. Afr. v. 491 ; 

 A. Bennett in Dyer, Fl. Cap. vii. 42 ; Rendle in Cat. Afr. PI. Welw. ii. 93. 



iMO-wer Guinea. Angola : Mossamedes ; in brackish swamps near Aguadas, 

 between Mossamedes and Calvaheiros, not far from the sea, rather rare, TFehvitsch, 

 3016 ! 



Also in South Africa. 



2. APONOGETON, Thunb. ; Benth. et Hook. f. Gen. PI. iii. 1018. 



Perianth of 1-3 equal or unequal segments, or 0. Stamens 3-6 or 

 more; filaments subulate, persistent. Carpels 3-6, 2- or more ovuled; 

 stigma on a stout style, decurrent or persistent. Fruit of 3 or more 

 hardened follicles. Seeds erect ; embryo straight. — Submerged plants 

 with tuberous rootstocks, in the early state very like Fotamogeton. 

 Leaves either floating or erect ; varying in shape from linear to oblong 

 (or subulate in one species ?). Scape with simple or bifid sessile spikes 

 of unilateral or distichous flowers, the young flower enclosed in a 

 deciduous sheath. 



Species about 20, in Asia, Africa and Temperate Australia. 

 Leaves not or only slightly dilated into a blade . . 1. A spathaceus. 



Leaves petiolate, oblong. 



Leaf-blades distinctly cordate at the base. 



Leaf-blades more than three times as long as broad, 



very obtuse . . . . . . 2. A. suhconjugatus. 



Leaf-blades less than three times as long as 



broad, subacute . . . . . . ^. A. Holuhii. 



Leaf -blades not distinctly cordate at the base. 



Flower-spikes slender, not exceeding 2| lin. in 



diam., whitish . . . . . . Ai. A. Jcraussianum. 



Flower-spikes 3 lin. or more in diam. 



Perianth-segments about 1 lin. long, whitish . 5. A. Rehmanni. 

 Perianth-segments l|-2 lin. long, purple . . Q. A. ahyssinicus. 

 Leaves petiolate, linear or linear-lanceolate. 



Leaves 7-nerved 'I. A. Stuhlmanii. 



Leaves 5-nerved . . . . . . . 8. ^. Boehmii. 



Leaves sessile, ligulate, membranous . . . . Q. A. vallisnerioides . 



1. A. spathaceus, E. Meyer in Drege, Ztvei 

 JDocumente, 137, name only. Leaves very narrow or elongate-subulate, 

 obtuse or dilated into a linear-lanceolate blade. Spike bifid ; branches 



