NOTES ON PONDWEEDS. 168 
Widely spread in Australia, New Zealand, South Temperate 
merica, &e. 
a lanceolate, a a ise, ‘mode ely firm in texture, 
erect, elastic, green and phe clothed with short brown hairs 
—5 ng, 4-? in. broad at th ddl 
0 
narrowed gradually to both ends. Pinne very numerous, broadly 
adnate ~ -_ base, contiguous, entire, lanceolate, subobtuse, the 
central ones 4-4 in. long, 1-12th to 1-8th in. broad. Veins dis- 
tinetly cae ; costa zigzag; Seplot 8 few, ari -patent, simple. 
ori globose, medial, slightly immersed. — Bellenden Ker range, 
8000-4000 ft. Intermediate between P. parvulum Bory and P 
fuscatum Blume. 
Polypodium (Pleuridium) simplicissimum F, M. —-Bellenden Ker 
range, alt. 5200 ft. An endemic Queensland species. 
ymnogramme (SEnuicuza) Sayeri, n. sp. — Rhizome 
epigcous, wide-creeping, $ in. diam.; palew dense, ascending, 
lanceolate, membranous, dull brown. Fronds spaced out on the 
in, 1 i 
patent, rate in. long — Bellenden Ker range, a —_ ft. Allied 
to G. membranacea thee and the Chinese G. W. 
Vittaria falcata Fée, — Mount Bellenden. Sen a 5200 ft. A 
Malayan species not previously known in Australia. 
NOTES ON PONDWEEDS. 
By Aurrep Frysr, 
Potamoceton HETEROPHYLLUS Schreb. Stem slender, much 
encegas at thé base; lower branches spreading, barren, permanently 
bmerged ; fruiting branches usually ascending to the surface by a 
naked length of stem, at the end of which the flower-spikes are~ 
sessile, but not amplexicaul, narrow, strap-shaped, elliptical or 
As : 
; up 
most ero te opposite, a petiole  excending the lantiicl, 
flat, entire, membranous and reticulated, re freque 
co eee fey opaque, elliptical, a ae dbase or rotundate ; 
usually abruptly contracted into the petiole, sometimes 
Pepiecrens: Stipules sa ~ sepa or scarious, small and 
_¢lasping, or larger, loose, and spreading; uppermost cymbiform. 
