
AQUATIC PLANTS OF FRESHWATER 


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FIG. 131, Greater Bladderwort, 
Utricularia vulgaris; and Lesser 
Bladderwort, Utricula ia minor. 
Reduced one-third. 
gins of ponds in New Jersey and New York, Massa- 
chusetts and Rhode Island to Illinois, south to 
Louisiana and Texas. 
species of which 14 occur generally in the United 
States and 3 only in the Southern States. 
Utricularia vulgaris (Linn.) or Greater Blad- 
derwort, Hooded Water-milfoil, Pop Weed, etc. 
Fig 131, occurs in ponds and brooks throughout 
nearly the whole of North America. The deli- 
cate 2 to 3 pinnately divided and much crowded 
floating leaves have numerous bladders, racemose 
yellow flowers and long recurved fruit. Flowers 
June to August and also propagates by winter 
buds. 
Utricularia minor (Linn.) or Lesser Bladder- 
wort, Fig. 131, occurs in bogs and shallow ponds 
from Greenland, Labrador and British Columbia 
south to New Jersey, Arkansas, Utah and Cali- 
fornia. The floating leaves are 
short, much scattered, with 
fewer divisions andnotas many 
bladders borne among the 
leaves. The flowers are pale 
yellow and the fruit has the 
peduncle reflexed. Flowers 
June to September in different 
altitudes. 
Utricularia biffora (Lam.) 
or T'wo-flowered Bladderwort, 
Fig. 132, occurs on the mar- 
The leaves are finely divided 
with few divisions and are copiously provided with blad- 
ders. The flowers are yellow. Blossoms during warm 
weather, later in the season the farther north it occurs. 
Other generally distributed species are U. gibba, 
Humped Bladderwort; U. intermedia, Flat-leaved 
Bladderwort; U. clandestina, Hidden“fruited Bladder- 
wort; U. purpurea, Purple Bladderwort; and U. subulata, 
Tiny or Zigzag Bladderwort. 
The Bladderworts are beautiful floating aquarium 
plants which thrive satisfactorily indoors. Any_of the 
three described species, and occasionally some of the 
205 

FIG. 132, Two-flowered 
Bladderwort, Utricularia 
biffora. 
Reduced one-third. 
