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6. R. ruammMuta L. Leaves entire; akenes 
smooth; stamens more than 10; petals bright 
yellow.—2f. Marin County. Summer. 
7. BR. pusmtus Poir. Leaves entire; akenes 
granulate; stamens never more than 10; petals 
yellow.—©. Inundated places near Napa. 
Summer. 
8. R. Loss Hiern. Aquatic; leaves float- 
ing, 3-lobed; submerged leaves 0; styles long, 
filiform, with small terminal stigma; petals 
white with yellow claws.—2. Olema. Sum- 
mer. 
9. KR. aguatinis L. Aquatic with submerged 
capillary, multifid leaves; styles subulate, 
not longer than the ovary, introrsely stigma- 
tose; petals white with yellow claws.—2. 
Presidio. Marin County. Summer. 
All perennial species possess an acrid, pois- 
onous principle, which disappears by drying, 
so that the plant, avoided by animals in its 
growing state, becomes harmless when made 
into hay. 
6. Myosurus L. Movszrarz. 
Sepals 5, calcarate. Petals 5, on filiform 
claws. Fruit o-akenes, crowded on an elon- 
gated, spike-like receptacle.— ©. Dwarf plants 
with radical leaves. 
1. M. minimus L.—Niles. Spring. 
