ca 
178 REVISION OF THE AUSTRALIAN SPECIES OF POTAMOGETON. 
2 BY TENUICAULIS FP, Mueller ! ate Austr. 7, p. 171); Frag. 
Phi. “Aust. i. 90, 244; 8, 217, — Victoria; S. Australia; Queens- 
land. Extending to Africa, or a nee allied species. 
8. 8. P. nucens L., var. tonerrotius (Gay sp.).— Tambo River, 
«Victoria, i Muller in Herb. Kew! 
spus L.! Flor. Austr. 7, p. 172. iene Colac, Victoria, 
F. Muar The plant of ww aapres ekg 
0. P. prrroniurus L., ERI kh ra ralongus 
Mueller, * perhaps not of Walfen : Bertani, Fl. Austr., 7, p. 172.” 
—In doubting this as the plant of Wulfen, Mr. Ben tham was 
correct. The Australian plant is a variety of perfoliatus ; certainl 
in facies much resembli ing prelongus ; differing from by 
its less amplexicaul sete short peduncles, very dense spikes, an 
pale stipules. Most of the Australian specimens of 7 perfoliatus are 
characterised by very Wee internodes 
. P. acutironius ink, Fl, Anse Vs Bs bt 4 compressus Li, ; 
at in Herb. Kew! P. zoster ifolius ae ae Mueller in Herb. 
w! — As yet known for a single locality only. Murray River, 
Victoria : otherwise not yet known out of Europe. 
12. P. ocureatus Raoul! ws de Pl. de la N. Zeelande, Pe 13. 
P. obtusifolius Bentham, Fl. A 7, p. 172-8, non Mertens et 
och. P. gramineus R. Brown galt 843. — Mr. Bentham voties 
the Australian plants to the obtusifolium of Mer tens and Koch; but 
ab distinet from all the forms of obtusifolius, of which I 
possess a type-specimen P onthah by Mertens. woe yee of Raoul’s 
plant I am indebted to Prof. Bureau, of Par Queensland, 
Mueller ! Bailey ! 8, Australia, Tepper ! Vietora Mueller | Tas- 
mania, South Esk River, « Tauncestor’ 1844 
. P. peorinarus L.; Fl, Austr. Y fie — Derwent River, 
Tasmania, ley. Abbot ex Mueller. Only Psifforing from the usual 
state in the shorter peduncles 
14. P. vitzrorms Nolte! P. marinus L., Mueller, non L. herb. ! 
ake — Victoria, Mueller, 1 believe the true plant, but ripe 
fruit is wanting : 
15. P. Tepperi mihi. — « Pool 500 miles north of Brisbane, 
Queensland,” #. M, Bailey. Neighbourhood - ioneer River ? 
*« River Cygnet, Knicks, South Australia,” J. G. O. Tepper.—Stems 
simple in specimens seen, 6-10 in. high ; subm merged (lower) leaves 
4 in. long by 4 in. wide, the lamina tapering se either end; upper 
leaves ovate- anoaaer oating leaves from oval with subcordate 
ases to ovate with tape ing bases; 21-23- ooitiad 8 x 1} in.), 
coriaceous, on long petioles enlarged gradually upwards ; sibatke 
soon decaying ; peduncles 2-3 in, long, thickening upwards; spikes 
{-1 in. long, dense in fruit ; fruit nearly straight on the inner face, 
short beak forming a continuation of the inner face, with projecting 
processes irregularly distributed on an outer angles ; embryo with 
its upper hag curved to half its de 
with P. natans iP. case Pour., P. Leschen- 
aultii chan. ! &e. ey drawing of the fruit of this in Linnea, 2 
A 3 
