Halorragidaceae, Water Milfoil Family. 
Perennial aquatic or amphibious herbs with alternate, opposite or 
whorled leaves, which when submerged in weter are often finely divided, 
Flowers perfect or unisexual, sessile in the axils of leaves, Sepals 
2-4, Petals of the same number, small, often wanting. Stamens 1-8, 
Ovary inferior, angled or winged, the calyx-tube adherent to it, consist- 
ing of 1-4 somewhat united carpels, Fruit a nutlet or crupe. 
O Stems more or less floating, the submerged leaves 
4 pinnatifid into filiform segments; stamens 4-8 J, Myriophyllum 
o Stems more or less erect, the submerged leaves 
4 entire, whorleds; stamen 1 D, Hippuris 
— 
|, Myriophyllum (Vaill.) Le Water Milfoil. 
Stems usually floating, with the submerged leaves finely pinnatifid, 
those submerged being entire or lobed. Flowers usually emersed, the 
uppermost usually staminate, the lowermost pistillate, those intermed- 
jate perfect. Stamens 4-8, Fruit bony, indehiscent but splitting into 
2-4 angled nutlets, 
©Bracts pinnatifid, vectinate | Me verticillatum 
— 
-Bracts entire or denticulate 2. Me spicatum 
_— 
1. Me verticillatum L,. var, pectinatum Walbr, Leaves in whorls of 4 or 5, 
1-3 cm, long, pinnately divided into 15-20 filiform segments; flowers 
subtended by leaf-like but greatly reduced pinnatifid bracts 5-8 mm, long, 
forming a slender interrupted spike, sepals scarcely 2 mm, long. 
Marshes, Kootenai Co., Leiberg 88, 
o14 
we re NS Rae _— 
