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2. inundatum, L. Amherst, &c. 



3. annotinum, L. 



4. dendroideum, Michx. 



5. clavatum, L. True Club-Moss. 



6. complanatum, L. Ground-Pine, & var. sabinsefolium, Gray. 



2. SELAGINELLA, Beauv., Spring. 



1. rupestris, Spring. 



2. apus, Spring. 



3. ISOETES, L. Quillwort. 



1. echinospora, Durieu. 



2. riparia, Engelm. 



3. Engelmanni, Braun. 



Class IV. ANOPHYTES. 



Order 104. MXJSCI. Mosses. 



(By C. C. Frost.) 



1. SPHAGNUM, Dill. Peat-Moss. 



1. cymbifolium, Dill. Bogs and swamps. 



2. Lescurii, Sulliv. Shores of ponds. 



3. squarrosum, Pers. Bogs and swamps. 



4. acutifolium, Ehrh. Bogs and swamps. 



5. cuspidatum, Ehrh. Bogs and swamps. 



2. ANDREA, Ehrh. 

 rupestris, Tourn. Rocks in mountains. 



3. PHASCUM, L. 



1. muticum, Schreb. Moist ground. 



2. cuspidatum, Schreb. Old fields, <fcc. 



3. alternifolium, Brid. Fields, &c. 



4. subulatum, Schreb. Old fields. 



5. Sullivantii, Schimp. Moist ground. 



4. BRUCHIA, Schwaegr. 

 flexuosa, Schwaegr. Damp grounds. 



5. GYMNOSTOMUM, Hedw. 



1. curvirostrum, Hedw. Rocks. 



2. rupestris, Schwaegr. "Wet rocks. 



6. WEISIA, Hedw. 

 viridula, Brid. Old fields, hillsides. 



7. TREMATODON, Rich, 

 longicollis, Rich. Clayey and sandy soils. 



