100 



above the leaves. Very variable. Leaves narrowly linear, from 

 tine setaceous to 3-nerved in one wide leaved variety found at the 

 Black Rapids. 

 2450. P. Robbinsii, Oakes. 



A stiff dark-green plant growing- in deep water and very rarely 

 fruiting. Leaves linear, in two ranks, recurved, spreading. 

 Meech's Lake. [J.F.) Buckingham. (./. Macoun.) 

 ZANNICHELLIA, Horned Pond-Weed. 

 2-452. Z palustris, L. 



A slender branching plant Common. Growing under water, with 

 opposite inear thread-like leaves, bearing monoecious flowers in 

 the axils ; nutlets, usually 4 together, elongated, beaked. 

 Naias, L. Naiad. 



2455. N. flexilis, Rostk. and Schmidt. 



A dwarf leafy plant growing on the bottom of ponds and streams. 

 Commou. Leaves linear, minutely serrulate, sessile, dilated at the 

 base, somewhat crowded into whorls. Flowers solitary, axillary, 

 sessile. 



CYPERACE^ Sedge Family. 



CYPERUS, L. Galingale. 

 2457. C. diandrus, Tor. 



Low ground. Annual. Common. Spikelets flattened, dark brown. 

 2459. C. aristatus, Rottb. 

 C. inflexus, Muhl. 



On gravelly or muddy river banks. Common. iB.) Spikelets at 

 first yellowish, afterwards rusty-brown. Scales tapering to a long- 

 recurved point. A small diffusely spreading annual. Flowering- 

 plants may frequently be found half an inch high. 

 2401. C. esculentus, Linn. 

 C. phymatodes, Muhl. 



I liver bank. Local. In abundance below Parliament Hill; along 

 Bingham's Creek, Hull, and at Gatineau Point. Culm 1 2^ 

 leet high. Umbel compound, much shorter than the long in- 

 volucre; spikelets numerous, light straw coloured, 12 30 flowered. 

 1 toots bearing small nut-like tubers. 



