Callitrichaceae. later Starwort Family. 
Inconspicuous anmal or perennial herbs Yaaewbag—in_shallowweter—or> 
wa@y with opposite entire leaves which are often crowded towards the ends 
of the branches. Flowers inconspicuous, 1-3 in the axils, having neither 
calyx nor corolla but sometimes subtended by 2 membranous bracts. Stamin- 
ate flower formed of 1 stamen. Pistillate flower formed of a single 4-cham- 
bered ovary bearing 2 stignas. Fruit leathery, indehiscent, splitting into 
4 nutlets at maturity. 
Callitriche L. 
The same characters as the family. 
© Floating or emersed leaves obovate or spatulate 
4 5-veined; flowers subtended by 2 bracts /. Ce palustris 
——s 
Oo All leaves linear, l-veined; flowers bractless . 2,C. autumnalis 
1. Ce. palustris L.» Anmal, the submerged leaves linear, l-veined, 1-4 cm. 
long, scarcely 1 mm. wide, the floating leaves, elliptical obovate or 
spatulate, 5-6 mm- long, 3-veined, narrowed at the base toa petiole 2-3 mn. 
long, all entire; bracts minute,.5-1 mm. long; fruit obovate, 1.5 mm. long, 
notched at the apex, eopedathe obes narrowly winged. 
Frequent in slowly moving streams or shallow embayments of lakes or 
vernal pools. : 
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2. C. autumnalis L. Annual with linear submerged leaves 0-2 CMe long, 
l-veired; flowers bractless; fruit sub-orbicular 1-2 mn. long. 
To be expected in our region. 
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