2s 
SPARGANTACEAE 
Sparganium 
Sparganium eurycarpum Engelnm. Burreed 
Ivy Neck. One station: large clump on dried mud bottom of 
cut-off pond on Cheston Peninsula. Hectare 4880. Associate species: 
Rumex verticillatus, Sambucus canadensis, Sium suave. Higman 944, 
ZOSTERACEAE 
1. Flowers in spikes or on a long axis. 
2. Spike more than 2-flowered, raised above the 
stipule in anthesis; carpels in fruit sessile...... Potamogeton 
2. Spike 2-flowered, enclosed in the sheathing leaf 
base in anthesis; carpels in fruit raised on slender 
stalks. Expected (Ruppia). 
EM OWETS sax MMlalray, sae, enctlelieeneraleieiehelslsisveiclelolsveielcieuevelehalsieralevers tee Cannelcheldleita 
Potamogeton 
Potamogeton perfoliatus L. 
var. bupleuroides (Fern.) Farw. Pondweed 
Java Farm and Ivy Neck. Abundant in estuaries. Associate 
species: Myriophyllum spicatum. Higman 272, 1009. 
Zannichellia 
Zannichellia palustris L. Horned Pondweed 
Ivy Neck. One station: cut-off pond on Cheston Peninsula. 
Higman 1154. 
ALISMATACEAE 
1. Carpels in a single ring, strongly flattened; style 
on the ventral margin of the carpel, below the tip; 
flowersvall” perbects ‘Stamen's oO. sis-c:ereieis) sis.c/e\eee so oletel een eAU Ede STal 
1. Carpels in dense heads; style apical; upper flowers 
staminate (or all either staminate or pistillate); 
SEAMEMS! TUMETHOUS . ci «0 0 0 clei sielic' ceo cece reece ec vcceseseevee oagpittaria 
