1913] The Ottawa Naturalist. 85 



(Vallisneria spiralis). This plant, which might better be called 

 water ribbon, as it does not belong to the grass family, was still 

 blooming. Some of the white pollen of the staminate flowers 

 was seen on the surface of the water floating to meet the pistillate 

 flowers, which had arisen with sudden growth to receive it. 

 Several species of the pondweed were found, one of the most 

 abundant being the clasping-leaved pondweed (Potamogetou 

 perfoliatus), and entangled with these was the mud plantain 

 (Heteranthera (labia), which earlier in the season raises its pale 

 yellow flowers just above the water; and in the same company, 

 the hornwort (Ceratophyllum demersum) and water milfoil 

 (Myriophyllum sp.). These two last-named plants somewhat 

 resemble one another in general appearance, but on closer 

 examination we find a readilv remembered distinction in the 

 feather-like leaves of the latter. Closer to the shore, where the 

 Cat-tails (Typha latijola) and the Wild Rice (Zizania sp.) are 

 alwavs in evidence, were seen the artistic globular heads of the 

 bur-reeds (Sparganium eurycarpwn and S. americanum var. 

 androcladum) with many members of the Sedge family, chiefly 

 the club-rush (Scirpus validus), nut-grass {Cyperus esculentus), 

 the dark green bulrush {Scirpus atrovirens), and the Dulichium 

 arundinaceum. Floating among the stalks of these plants was 

 the vivid green of the little duck-weed (Lemna minor), and the 

 greater duck-weed {Spirodela polyrhiza) and the large lily pads. 

 The different species of water lilies were distinguished, apart 

 from the shape of the leaves, which is rather uncertain, by the 

 seed vessels. The fruit of the yellow pond lily (Nymphaea sp.) 

 remains above the water to ripen its seeds, while the pink and 

 white water lilies (Castalia sp.) complete their maturity beneath 

 the surface. On the edge of the shore, as a graceful background 

 to the straight lines of the reeds and rushes, the trees were 

 noticed to be festooned w r ith the orange-berried bitter-sweet 

 (Celastrus scandens) and the rich, blue, grape-like clusters of the 

 Moonseed (Men is per mum canadense) and bending over into the 

 water, the long, red-leaved stems of the water-willow (Decodon 

 verticillatus) . 



Several of the members proceeded direct to one of the 

 islands to examine land plants and collect insects, and other 

 zoological specimens. Unfortunately, however, the collections 

 made were small. At 4.30 the whole party met on the Island 

 and short addresses were given bv several of the leaders. Miss 

 Fyles spoke of many of the plants which are mentioned above, 

 and answered questions regarding them. 



Mr. H. McGillivray referred to the geological formation of 

 the district, it being of "the Utica rock formation. A specimen of 



