PL end. ph. 8. TYPHACE^. 29. Sparganium. S9 



yJment roundish ; Jruit sessile ; 

 set£E none ; stigma linear Sparganium. 29. 



Ament roundish ; fruit sessile ; 

 setcs none ; stigma peltate Platanaria. 30. 



Ament cylindrical ; fruit pedicelled; 

 setce girding the fruit Typha. 31, 



I. 29. SPARGANIUM. Dioscorldes. Burreed. 



Ament roundish, axillary; perigonium 3-lobed, deciduous; 

 stamens three ; filaments capillary ; anthers oblong ; ovary 

 turbinate ; style short ; stigma 1 or 2, linear, long, acute ; 

 akenium 1-2 seeded; not girt with bristles. — Root creeping; 

 leaves three-edged ; stem branchy ; ament lateral, on a 

 flexuose peduncle ; upper arnents male. 



1. Sparganium ramosum. Branched hurreed. 

 Leaves 3-edged at the base, sides concave; peduncle 



branched. 



Sparg. ramosum, Rati Syn. 437, 1 ; Ger. em. 45 ; Park. 1205. 

 Sparg. erectum, Lin. S. P. 1378. 



Ditches and river-banks ; perennial ; June, July. 



Stem about 3 feet high ; peduncles alternately branched, 

 many flowered, bent at bottom ; flowerheads alternate, 

 sessile, many flowered ; upper heads male, numerous ; lower 

 heads female. 



2. Sparganium simplex. Unlranched lurreed. 

 Leaves 3-edged at the base, sides flat ; peduncle simple, 



Sparg. non ramosum, Rail S^/n. 437,2; Park, 1205= 

 Sparg. latifolium, Ger. em. 41. 

 Sparg. erectum /3. Lin. S. P. 1378. 



Ponds in a gravelly soil ; perennial ; July, August, 

 Stem and peduncle not branched ; lowest flowerhead 

 sometimes pedicelled ; calyx greenish. 



II. 30. PLATANARIA. Dodonseus. Ribbandwort, 

 Ament round, axillary ; perigonium 3-leaved, deciduous ; 



stamens 3 ; filaments capillary ; ovary subturbinate ; style 

 short ; stigma ovate, peltate ; akenium one-seeded, not girt 

 with setae. — Root creeping, perennial ; stem and leaves flat, 

 flaccid, semipellucid, reticulate, floating ; peduncle un- 

 branched ; female flower heads 2 or 3, the lowest pedicelled, 

 malehead usually single, terminal. 



