Es 
ADaP TS erates: 
apex ; petsnilen variable, short or long, equal ; spi 
Potamogeton. | NAIADACE® (Bennett). 49 
Also in Europe, Asia (very rare), and N. America 
Very rarely this produces spathulate upper leaves. 
ou; F. siggrone yore Sp. Plant. ed. i. 127); stem slender, sohneieh 
branched; leaves all similar, sessile, semiamplexicaul, narrow] 
Sox ania: acute, or subacute, 1—3-nerved, and mostly Withibtt 
fascicles of leaves in the axils ; stipules small, acute or subacute ; 
aa slender, ie ie in length ; spike few-flowered, 4-1} in, 
and slightly convex on the ee oo without teeth. Dura 
and Schinz, Conspect. Fl. ae 
Coast Region: Cape Div. ; ponds near Cape Lown, Burchell, 669! vai iow 
between Tyger Berg and Blue Berg, Drege, 1206! Swellendam Div.; 
i 3! 
ry 17: 
Katanart Reaion: Transvaal; Apies Poort, near Pretoria, Rehmann, 4024! 
Eastern Region: Natal; Umzinyate River, Wood, 94! Umbhlasine River, 
Wood, 962! 
Also in Tropical and North save Europe, Asia, and Am 
As with the last, this very rarely produces = ae ‘leaves, in which 
state it has hick called P. panor mitobies by Biv 
11, P. pectinatum (Linn. Sp. Plant. ed. 1, 127); stem cylindrical, 
or subcompressed, repeatedly branched ; leaves all similar, the upper 
sometimes SPREGONS, 1-nerved, low er long linear with 3-5 nerves ; 
rupted ; upper flowers generally approximate ; 
green, obliquely obovate, slightly compressed, 3-keeled on the dorsal 
t ( but variable), slightly convex, 
Durand “and Schinz, 
Conspect. Fi. “ vi 496: PP. marinum, L. 4 ex Krauss in Flora, 
4, 
Ast Reaion : Bredasdorp Div.; Zoetendals Vlei, ee ! Uitenhage Div. ; 
Zao River, Zeyher, 4328! Ecklon and Zeyher 
pane ARI Reeion: Transvaal; Schoon Spr uit, 
me 
Wide dispersed in all parts of the earth. 
near - Klerksdorp, Nelson, 
IV. RUPPIA, Linn. 
Perianth none. Stamens 2; anthers 2-celled. Carpels 4—1-ovuled ; 
i ds sessile. Fruit of 4 long-stalked, ovoid, or obliqu ne-ovoid 
hes on a common peduncle. “Seeds uncinate ; ; radicle large. 
leaves elongate, nro ho 9 
erged slender brackish-water plants 0 BF 
h, 
Sub ; 
sputter ets small, usually 2 together a within the leaf-shea 
h duncle which mostl y isn and becomes seainle or meal 
twist ted 
DisrRiB. Temperate and tropical regions. Species 1 or more ? or many sub. 
Species P : " 
VOL. VII. 
Mo. Bot.Garden 
