Order 10S.-LEMNACE.iE. (Duckweed Family.)

Lemna, L. (Duckweed. Duck's-meat.) Li. polyrrhiza, L. Ponds. (Leggett.)

Order 109.-- TYPHACEE. (Cat-tail Family.)

Typha, Tourn. (Cat-tail Flag.) T. latifolia, L. Wet places. T. angustifolia, L. Wet places.

Sparganium, Tourn. (Bur-reed)

S. eurycaqium, Engelm. (Bicknell.) S. simplex, Hudson. Not rare.

814 REPORT OF THE FLORA

Order 110.-- NAIDACE2E. (Pondweed Family.)

Naias, I.. (Naiad.)

N. flexilis, Rostk. (Bicknell.)

Zannichellia, Micheli. (Horned rondweed.)

Z. palustris, L. Lower part of the county, now New York. (Bicknell.)

Zostera, L. (Eel-grass. Grass-wrack.) Z. marina, L.

Ruppia, L. (Ditch-grass.)

R. maritima, L. Shoal water along the coast.

. Potamogeton, Tourn. (Pondweed.)

P. natans, L. Ditches and slow streams. P. Oakesianus, Robbins. Ponds and ditches. P. hybridus, Mx. (Bicknell.) P. amplifolius, Tuckerman. Slow rivers. P. perfoliatus, L. (Bicknell.)

Order 111.-- ALISMACEiE. (Water Plantain Family.)

Alisma, L. (Water Plaintain.

A. Plantago, L. Shallow water and edges of streams.

Sagittaria, L. (Arrow Head.) S. variabilis, Eng. Wet places.

Var. latifolia, Gray. With the last.

Var. diversifolia, Gray. With the last,

Var. augustifolia, Gray. With the last. S. calvcina, Eng. Water in flooded places.

Var. spongiosa, Gray. Along brooks with the last. S, heterophylla, Pursh. Peekskill. (Le Roy.) S. pusilla, Nutt. Peekskill. (Le Roy.)

Order 112-- HYDROCHARIDACES. (Frog's-bitt Family.)

Anacharis, Richard. (Water-weed.)

A. Canadensis, Planchon. Slow streams.

Vallisneria, Micheli. (Eel-grass.)

V. spiralis, L. Slow waters. Along the coast.

Order 114.-- OECHIDACES. (Orchis Family.)

Orchis, L. (Orchis.)

O. spectabilis, L. Shady woods.

OF WESTCHESTER COUNTY. 8l

Habenaria, Willd,, R. Br. (Rein-Orchis.)

H. tridentata, Hook. (Leggett.)

H. virescens, Spreng. Peekskill.