216 CLIII, NAIADACEZ (BENNETT), [ Triglochin. 
490; A. Bennett in Dyer, Fl. Cap. vii. 42; Rendle in Cat. Afr. Pl. 
Welw. ii. 98. 7. Barrelieri, Loisl. Fl. Gall. ed. 2, 1. 264. 
Lower Guinea. Angola: Huilla; plentiful in boggy pastures and on the 
banks of the river at Lopollo and near Ohai, Welwitsch, 3017! 
Also in North and South Africa. 
2. T. striatum, Ruiz ¢& Pav. Fl. Perur. 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 1-14 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. Pl. Welw. u. 93. 
Lower Guinea. Angola: Mossamedes; in brackish swamps near Aguadas, 
between Mossamedes and Calvaheiros, not far from the sea, rather rare, Welwitsch, 
3016! 
Also in South Africa. 
2, APONOGETON, Thunb.; Benth. et Hook. f. Gen. Pl. iii. 1013. 
Perianth of 1-3 equal or unequal segments, or 0. Stamens 3-6 e 
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 Potamogeton. 
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 4 
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 : ° . 
Leaf-blades less than three times as long as 
broad, subacute . ; ; . . 3. A. Holubii. 
Leaf-blades not distinctly cordate at the base, 
Flower-spikes slender, not exceeding 23 lin. in 
diam., whitish . : s 
Flower-spikes 3 lin. or more in diam. 
Perianth-segments about 1 lin. long, whitish 5 
Perianth-segments 13-2 lin, long, purple . 6 
Leaves petiolate, linear or linear-lanceolate. 
Leaves 7-nerved . : ; . . : qs 
8 
9 
: . 2. A. subconjugatus. 
A. kraussianum. 
A. Rehmanni. 
. A, abyssinicus. 
A 
a 
A 
. Stuhlmanit. 
. Boehmit. 
. vallisnerioides. 
_ Leaves 5-nerved . - : 
Leaves sessile, ligulate, membranous 
_1. A. spathaceus, /. Meyer in Drege, Zwei Pflanzengeog' 
Documente, 137, name only. Leaves very narrow or elongate-subulate, 
obtuse or dilated into a linear-lanceolate blade. Spike bifid ; branches 
