298 MONOECIA. POLYANDRIA. Arum. 
Masc. Cal, tetraphyllus. Pet. 4. Stain. 8. 
Fasm. Cal. tetraphyllus. Pet, 4. Stigmata 4. 
sessilia. Sem. 4, corticata. 
Alale and female flowers frequently on the same 
plant. Cal. 1 leaf,, 4 toothed. Petals 4, with 
claws \ soon falling off. Styles none. Nuts 
2 or 4, covered with a coat. 
spica- M. floribus interrupte spicatis aphyllis. 
turn. Spikes interrupted^ leafless^ 
SPIKED WATER-MILLFOiL. Ditches, ponds,, 
lakes and still water. Old Trent Ditches beyond New¬ 
ark Bridge, on the Kelham road. P. July, Aug, 
verticiU M, floribus omnibus axillaribus. 
latum. ^4^ Flowers in leafy whirls, 
VERTICILLATE WATER-MILLFOIL. Ditches 
and stagnant waters. In the Trent below Colwick, on 
the opposite side of the river. Deekin g. 
P. July, August, 
SAGITTARIA. Smith. 1023. With, 
Masc. Cal. tiiphylhis. Pet. 3. .S amina fere 24, 
Faem. Cal. triphyllus. Pet. 3. Pistilla plu- 
rima. Caps, plurimas, ventricesae, monos- 
permae, 
Siam, and Pist. in different flowers on the ^ame 
plant. Cal. 3 leaves. Bloss ^ petals, 
Male. Filam about 24, 
Fern. Seeds many, naked, 
sagitti- S. foliis sagittatis acutis. 
Jolla. 5^ Leaves arrow-shaped, acute, 
COMMON XRROW-MEAl). Difchesand banks of slow 
rivers. Left hand ditches beyond Newark brid?e, on the 
Kelham Koad j ditches iu Nottingham Meadow j dit-^ 
