CICHORIACEAE 



649 



3. N. serpentarius (Pursh) Hook. In fields and thickets: Mass. 



to southern N. Y., Fla., Ala., Ky. and Miss. 



Throughout the range except the northern counties of N. Y. and 

 Pa., often replaced, on the coastal plain, by an entire-leaved form, 



N. serpentarius integrifolius (Cass.) Britton. 



4. N. trifoliolatus Cass. In woods and thickets: Me. to Vt., 



Pa., Tenn. and Mo. 



Common throughout the range, except the pine-barrens. 



5. N. virgatus (Michx.) DC. In moist sandy soil: N. J. to Fla., 



near the coast. 



The pine-barrens of N. J. 



6. N. racemosus (Michx.) DC. In moist open places: N. B. and 



Anticosti to the N. W. Terr., south to N. Y., N. J., Mo. and 

 Colo. 



N. Y. Westchester Co. and on the L. I. coastal plain. 

 N. J. Bergen and Hudson counties. 

 Pa. Reported but not definitely known from the state. 

 Arnoseris minima (L.) Dumort. has been reported as a waif. 



NUMBER OF GENERA AND SPECIES 



Genera Species 



Ophioglossaceac 2 9 



Osmundaceae I 3 



Schizaeaceae 2 2 



Polypodiaceae 18 40 



Marsileaceae 1 I 



Sealviniaceae 2 2 



Equisetaceae I 8 



Lycopodiaceae 1 11 



Selaginellaceae I 2 



Isoetaceae 1 7 



Pinaceae 8 22 



Taxaceae I I 



Typhaceae I 2 



Sparganiaceae I 8 



Zannichelliaceae 3 26 



Zosteraceae 1 1 



Naiadaceae 1 2 



Scheuchzeriaceae 2 2 



Alismaceae 4 14 



Elodeaceae 2 4 



Hydrocharitaceae. ... I I 



Gramineae 77 263 



Genera Species 



Cyperaceae 15 255 



Araceae 6 10 



Lemnaceae 3 6 



Xyridaceae 1 6 



Eriocaulaceae I 4 



Commelinaceae 2 5 



Pontederiaceae 2 3 



Juncaceae 2 31 



Melanthaceae 10 13 



Liliaceae 7 15 



Convallariaceae 8 15 



Smilaceae 1 7 



Haemodoraceae 1 1 



Amaryllidaceae 3 3 



Dioscoreaceae I I 



Iridaceae 3 10 



Orchidaceae 23 55 



Saururaceae 1 I 



Salicaceae 2 27 



Myricaceae 2 4 



Juglandaceae 2 8 



Betulaceae 5 15 



