36 ROCHESTER ACADEMY OF SCIENCE. 



1581. A. Clintonianum x spinulosum (Benedict) Dowell (comb, nov.) 

 {Dryopteris Clintoiiiana x spinidosa (Benedict)) Dowell, Torreya. 

 Scarce. Arbor vitae swamp, Chili, M. S. Baxter. 



15S2. A. Clintonianum x intermedium Dowell (comb, nov.) {Dryopteris 

 Clintoniana x intermedia Dowell, Bull. Tor. Bot. Club, 35, 1908.) 



Frequent, Arbor vitze swamp, Chili, and wet woods lower Genesee, 

 J/. 5. Baxter. 



1334. A. spinulosum Swartz var. dilatatum Hooker. [Dryopteris spinulosa 

 dilatata (Hoffm.) Underw,] 



Big Woods, Forest Lawn, Mrs. H. G. Pierce. 



1583. A. spinulosum var. concordianum (Davenport) Eastman. 



Rare. Arbor vitce swamp, Henrietta, M. S. Baxter. 



OPHIOGLOSSACE^. 



506. BOTRYCIflUM Swanz. Moonvvort. 



1351. B. ternatum Swartz var dissectum Spreiiger. 

 Henrietta, M. S. Baxter and V. Dewing. 



.507. OPHIOGLOSSUM L. Adder's Tongue. 



1353. O. vulgatum L. 



Near Coldwater and at Mendon Ponds, M. S. Baxter. Forest Lawn, 

 James Bishop. 



SELAGINELLACE.E. 



509. SELAGINELLA Beauv. 



1358. S. rupestris Spring. \_S. rupestris (L. ) Spring.] 



Dry sandy barrens, Penfield. Apparently the only station, except in 

 the far west, where this plant does not grow on rocks, M. S. Baxter and 

 W. Streeter. 



1584. S. apus Spring. 



Rare. Blue Pond, Wheatland, near Clifton, M. S. Baxter. 



