220 COMMON CANADIAN WILD PLANTS. 



long -stalked and surrounded by copious bristles forming the 

 down of the fruit. Leaves sword-shaped, erect, sheathing the 

 stem below. 



2. Sparta iii inn. Flowers in separate globular heads along the upper 

 part of the stem, the higher ones staminate, the lower ones pistil- 

 late, each ovary sessile and surrounded by a few scales not unlike 

 a calyx. Both kinds of heads leafy-bracted. Leaves flat or tri- 

 angular, sheathing the stem with their bases. 



1. TYPHA, Tourn. CAT-TAIL FLAG. 



1. T. latifolia, L. (COMMON CAT-TAIL.) Stem 5-8 feet 

 high. Leaves flat. No space between the staminate and 

 pistillate parts of the spike. Marshy places. 



2. S. angUStifo'lia, L. (NARROW-LEAVED or SMALL CAT- 

 TAIL.) Leaves channelled towards the base, narrowly linear. 

 The two parts of the spike usually with an interval between 

 them. Central and eastern Ontario. 



2. SPARGA'NIUIW, Tourn. BUR-RKED. 



1. S. euryear'pum, Engelm. Stem erect, stout, 2-4 feet 

 high. Leaves mostly flat on the upper side, keeled and hol- 

 low-sided on the lower. Heads several, panicled-spiked, the 

 pistillate an inch across in fruit. Nutlets or achenes with a 

 broad abruptly-pointed top. Borders of slow waters and 

 ponds. 



2. S. Simplex, Huds. Stem slender, erect, 6-24 inches 

 high. Leaves more or less channelled and 3-angled, about one- 

 third of an inch wide. Fertile heads about half an inch 

 broad in fruit. Stigma linear. Borders of ponds, etc. 



Var. andrOC'ladum, Engelm., (S. androcladum, Morong.) 

 is stouter and taller, with usually broader leaves, and 

 branching inflorescence. Fruiting heads also somewhat 

 larger. 



Var. ang-UStifO'lium, Engelm., (S. affine, Schnitzlein.) is 

 very slender, with leaves floating, long and narrow and flat. 

 Inflorescence simple, and fruiting heads smaller. 



3. S. minimum, Fries. Usually floating, with very 

 slender stems, and thin flat narrow leaves. Fertile heads 

 only 1 or 2. Stigma oval. Fruit oblong-obovate, pointed, 

 somewhat triangular. 



