46 NATADACE® (Bennett). | Potamogeton. 
** Without oe leaves: 
Leavy 
s 2-12 lin. broad. 
Leaves crisped, serrulate ; fruit ws (7) crispum 
aves flat, entire ; fruit short-beaked .. . (8) lucens. 
Teves Tes than 2 lin. b 
s linear, grass- Tike, 5- tee ov flattened aos Friesii, 
ph eaves linear, 3-veined ; : pusillum, 
ae es filiform, with ines spas at the base 
asa shea ... (11) pectinatum. 
1. P. natans (Linn. Sp. Fi 6d. 'l, 136) ; stem stout, very rarely 
branched ; submerged leaves 0 or reduced to blades ; floating leaves 
jie petioled, from subrotund to lanceolate, cordate and plicate at the 
base; stipules long and acute; pedu neles stout; spikes dense- 
flowered drupelets ‘large, convex on the Datel margin, semicireular 
n the dorsal, ete any raised bosses. Durand and Schinz, 
Canes Fi. Afr. 494, 
Ka ALAWAR Reeron : Transvaal; Yuckschyt River, sources of the Limpopo, 
Nelson, 51 
EAsTERN Sonar Natal; in a pool at Inyangwine, Wood, 3020! 
Found in all temperate regions ; rare in the tropics, 
. fluitans (Roth, Tent. Fl. Germ. i. 72); stem stout; sub- 
merged leaves gg scsi linear- lanceolate ; floating leaves ovens or 
ovate-lanceolate, long-stalked, tapering at either end, not plicate ; 
bl large, blunt ; arma stout ; spike dense-flowered ; no ripe 
ruit seen on either African or European specimens. P. natans, var. 
pins Chie, Adnot. Fl. Berol. 4. 
Coast ReGion: Worcester ae ; Brand Vlei, Rehmann, 2415! Uniondale 
Div.; Lange Kloof, Krauss, 1233 
sateen REGION : areal; Hooge Veld at Bronkers Spruit, Rehman™ 
This is probably a hybrid between P. natans and P. 
Widely distributed in Europe, Asia, North and Tropical renin 
3. P. americanus (Cham. in Linnea, ii. 226) var. Thunbergii (A. 
enn.) ; stem stout, rarely branched ; the submerged leaves trans- 
lucent, elongate or linear-lanceolate ; floating leaves. variable, cblong- 
lanceolate, elliptical or ovate-lanceolate, not plicate at the base; 
stipules blunt, large; peduncles stout, slightly pls npwee 
, y 
central one acute. P. Thunbergii, Cham. in ee ii "991 
natans, var. capensis, Durand and Schi nz, Conspec ect. Fl. Afr. v 
P, natans, Thunb. Prod.32. P. capensis, Scheele in Herb. ‘Buchenat! 
Coast ReGton: Cape Div.; Zeekoe River, Thunberg! Hartebeest Kraal, 
Brak River, oa und and Maire! Paarl Div. ; ; Berg River, Drége! Worcester 
Div. ; Verkeerde Vlei, Thunberg! Uite stapes Div., gf URE 
EASTERN yr : Port Natal, apeanae 
rand and Schinz have mistaken the meaning of Chamisso in heading the 
ani ons as at p. 221 ‘* 8, capensis,’ ‘whieh was merely intended for a geographical 
indication, not a botanical name. 
The typical form of ids — is found in Europe, Asia (rare), North 
Africa, and North Am 
