SELECTED WESTERN FLORA 



1. TYPHA. Cat-tail Flag. 



Elowers in a long and very dense spike terminating the stem, the 

 upper part containing the sterile, and the lower part the fertile 

 flowers. At maturity the sterile flowers fall, off, leaving a part of 

 the stem projecting beyond the fruit; seeds attached to bristles 

 forming a copious down. 



1. T. latifdlia, L. Common Cat-tail. 



Stout, with flag-like leaves and conspicuous spikes. Marshes, Man.- 

 Alta. - 



VI. NAJADACE.^ (Pondweed Family). 



Immersed aquatic herbs with jointed stems, and leaves either 

 sheathing or stipulate; flowers perfect with 4-6-parted perianth, 

 1-6 stamens, and 1-6 distinct 1-eelled ovaries, each usually 1-ovuled. 



1. POTAMOGfeXON. Pondweed. 



Perianth 4:-parted; stamens 4, opposite the segments of the 

 perianth; anthers 2-celled; ovaries 4; style short or wanting] 

 fruit drupe-like when fresh. Immersed aquatic herbs, generally 

 rooting at the joints, with alternate leaves some of which frequently 

 float on top of the water. 



1. P. pectinfitus, L. 



Stem thread-like, branched; leaves very narrowly linear; peduncles 

 thread-like; flower spikes of 2-6 whorls somewhat widely separated. A 

 common submerged plant in still or slow-running water, Man.-Alta. 



2. P. perfoliiltus, L. 



Stem branching; leaves round, ovate, or lanceolate fron) a heart-shaped, 

 clasping base, usually obtuse and crinkled on the edges; peduncles thick 

 and spongy. Still or slow-running water, more local than' the preceding, 

 Man. 



3. P. 20Sterifdlius, Schumacher. 



Stem branching, with a flattened wing; leaves linear and grass-like, 

 usually floating on top of the water for part of their length ; spike cylindrical 

 and shorter than the peduncle. Still or slow-running water, Man.-Alta. 



VII. JUNCAGINACE^ (Arrow Grass Family). 



Marsh plants with cylindrical leaves, and perfect flowers in a 

 raceme or spike supported on a naked scape. Perianth 3 or 6-lobed, 

 carpels 3 or 6, united; fruit a follicle or capsule. 



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