2. M. spicatum L. var. exalbescens (Fern,) Jeps, Leaves in vhorls of 3 
or 4, 1-3 cm. long, pinnately divided into 15-20 filiform segments; 
flowers in axillary clusters, subtended by entire ovate bracts 1-2 mm, 
long, forming a slender interrupted spike; sepals scarcely 2 m, longe 
Lake Pend Oreille, Leiberg 586, 
2.Hippuris Le Mare's Tail, 
Stems simple erect with whorled simple entire leaves, Flowers 
perfect, calyx not toothed, the rim entire. Petals small or none, 
Stamen 1, inserted on the calyx margin, Ovary l-chambered, forming 
a lesecced nutlet. 
1. He vulgaris L. —> Stems 30-60 ‘cm. long or more, more or 
less erect oruscending; not floating, the emersed leaves spreading, 1-2 om. 
long, 1-2 mm. wide, entire, 6-10 in a whorl, those submerged, flaccid 3-5 
cme long or more; flowers several in the axils, sessile, the stamen 1.5 me 
long, about twice the Iength of the calyx; mutlet ovoid, 1.5 mm. long, its 
walls porous. : 
In shallow water along lake shores or in boggy places which may dry out. 
——?Priest Lake, Piper 3737; Lake Pend Oreille, Leiberg 511; bog, Bonner's 
Ferry, Epling; Upper Priest Lake, Epling 7405. 
ms calle sr 
