- 50 NOTES ON PONDWEEDS. 
95. Mastigobryum Jamaicense L. & L. 
96. M. cuneistipulum G. & L. 
*97, M. Vincentinum L. & L.—St. Vincent. 
98. M. stoloniferum Linden 
99. Trichocolea tomentella, . "tomentosa Syn. Hepat 
100. — adunca Dicks. 8. juniperina Nees. Herberta 
adunca Spru 
1  Radula pallens 
102. R. complanata, 2. Seagal. Syn. Hepat.—A scrap with 
mosses. 
103. Lejeunia paar eae (Nees & Mont.) Spruce. Phragmt- 
coma Syn. Hepat. — A large loose blackish tuft, with stems 8 in. 
long; two perianths only. 
104. 
04. L. corticalis L. & L. (Phragmicoma).—A few scraps only. 
105. L. brachiata Nees 
106. L. squamata Nees,—On Thuidium, a few mors 
*107. L. Mougeotii L. & G.—On a of Calophyllum. Sane. 
108. L. denticulata (Web.) Nee 
*109. L. contigua Nees.—On a as —— Brazil; Mexico. 
*110. L. phyllobela Nees.—Cuba ; 
111. L. flava Swartz.—A scrap pens Radula propagulifera. 
*112. L. lucens Tayl.—Andes; Ohio. 
FILS. ds sonnet Lindenb. — ‘In India occidentali,’ Swartz ; 
perhaps Jam Also pesene and Madagascar. 
114. Frullania gibbosa Nee 
115. F. hians Tayl 
116. F. Brasiliensis Raddi.—A a variable plant. 
117. Metzgeria dichotoma (Sw.) Nee 
118. Pseudaneura fucoides Sw. Tungermannia Swartz; Hook. 
Mus. Exot. Metzgeria Nees, Synops. Hepat. 
NOTES ON PONDWEEDS. 
By Aurrep FRYER. 
3. PoramoceTon Lucens L.—Stem stout, branched from a little 
below the middle ; fruiting branches with many lateral branchlets 
starting at nearly right angles; leaves all submerged, translucent, 
undulate and finely serrulate at the margins, elliptical t o lanceolate 
or “ee to rotundate, subsessile peti Botate: ime narrowed 
to the petiole, but decurrent to the stem, not amplexicaul, 
minate, mucronate, or cuspidate; lowest often sete to a 
thickened midrib : stipules 2- mele’ very large, long, obtuse, sub- 
scarious to herbaceous; peduncle stout, thickened upwards; spike 
dense, cylindrical; drupelets ie, ‘ turgid,” obtuse on the back, 
faintly keeled; lateral ridges obscure; beak short, subcentral; 
colour of the whole plant yellowish olive-green, or green, rarely 
blue-green. 
