Se ~ A. Pe. mn in KR. 3. VY. Rercd bk 
S Ss. No. 49. 
PR. 7, en m2, Ba. 
Potamogeton. | NAIDACEAE. 127 
wanting or if present few and reduced to long and narrow phyllodes without 
any lamina. Peduncles stout, 2-4 in. long, bearing a dense-flowered spike 
14-2in. long. Penanth-s segments broadly rhomboidal, Fruit 4in. long, 
turgid, obliquely ovoid, keeled on the back when dry, beak short.—Hook. . 
_ Fl. Nov. Zel. i (1858) 236; Handb. N.Z. Fl. (1864) 278; Benth. Fl. 
Austral. vii (1878) 170 (tn part); A. Bennett on Journ. Bot. xxv (1887) 
177; Cheesem. Man. N.Z. FI. (1906) 748. 
Norta anp Sourn Isnanps: I have seen specimens from both Islands, and 
have gathered it myself in the Waikato River near Huntly. Mr. Arthur Bennett, 
whose knowledge of the genus is unrivalled, also informs me that he has seen 
undoubted specimens from New Zealand. It must, however, be rare; ior in an 
expedition made a few years ago along the whole course of the Lower Waikato I failed 
to find it, although all the other species known from New Zealand were observed. 
~~ ees —-s- 
ee 
2. P. polygonifolius Pourr. in Mem. Acad. Toul. i (1788) 325.— 
Stem creeping at the base, long or short, simple or sparingly branched. 
Floating leaves on long petioles; lamina 1—3in. long, elliptic-oblong to 
lanceolate, acute or obtuse, ue or subcordate or acute at the base, 
not plicate, thinly coriaceous; stipules much shorter than in P. natans, 
1-l4 in. long. Submerged leaves linear-lanceolate, acute. Peduncles vari- 
able in length, rather slender; spike dense-flowered, ala in. long. 
Perianth-se gments transversely elliptic. Fruit small, reddish, =’s— 45 1m. long, 
blunt and rounded on the back, not keeled, beak very short.—T. Kirk in 
Trans. N.Z. Inst. ii (1871) 165; Cheesem. Man. N.Z. Fl. (1906) 749. 
Norta AND SoutH IsLanps, Stewart IstaAnpd: Ponds and small streams from 
the North Cape southwards, not uncommon. Sea-level to 4500 ft. | December—April. 
Distinguished from P. natans by the smaller and more membranous leaves, much 
shorter stipules, slender peduncles, and much smaller fruit not keeled on the back 
when dry. Several of my specimens have been examined by Mr. A. Bennett, who 
informs me that their identity with P. polygonifolius cannot be questioned. The 
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ff . 
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The most abundanvus, 
numerous submerged leaves and smaller floating ones at once stvatwue wu accu 
eo natans, to say nothing of other differences. According to Mr. Bennett, it is also 
found in Tasmania. 
