6. S. cuspidatum, Ehrh.; Schimp. Gesch. d. Torfm. p. 60, t. 16. Subject to many marked varieties, among which are S. recurvum, Beauv.; S.laxifolium, C. Müll.; S. flexuosum, D. & M.; S. Torreyanum, Sulliv.; S. Mougeotii, Schimp.; etc.—Swamps and ponds, mostly Southern.
7. S. Lindhergii, Schimp. (Icscli. d. Torfin. p. 67, t. 25; S. cuspidatum, Lind. in Bot. Not., 1856, p. 122.—Found in Canada by Drummond according to Schimper, 1. e.
8. S. molluscum, Bruch.; Schimp. Gesch. d. Torfm. p. 71, t. 21.—Ponds, New Jersey, Austin.
9. S. cymbifolium, Ehrh.; Schimp. Gesch. d. Torfm. p. 69, t. 19; S. latifolium, Hedw.; S. obtusifolium, H. & T.; S. compactum, Brid. partly.—Bogs and swamps, common.
10. S. Rigidum, Nees; Schimp. Gesch. d. Torfm. p. 65, t. 18; S. compactum, Wils. not Brid.; Sulliv. & Lesqx. Musc. Bor.-Amer. Exsicc. (ed. 1), No. 12 & 13; S. strictum, Sulliv. Musc. Alleghan. No. 201.—Bogs, Southern States.
11. S. humile, Schimp. Gesch. d. Torfm. p. 80; Sulliv. & Lesqx. Musc. Bor.-Amer. Exsicc. (ed. 1), No. 14; Sulliv. Mosses U. States, p. 11, Icones Musc. p. 5, t. 3.—Florida. Probably a form of the last species.
12. S. subsecundum, Nees; Schimp. Gesch. d. Torfm. p. 74, t. 22 & 23; S. contortum, auct.; S. obesum, Wils.; S. Lescurii, Sulliv.; S. auriculatum, Schimp. op. cit. p. 77, t. 24.—Northern Ohio and Atlantic States.
13. S. squarrosum, Pers.; Schimp. Gesch. d. Torfm. p. 63, t. 17.—Northern and Middle States.
14. S. macrophyllum, Bernh. in Brid. Bryol. 1, p. 10; Sulliv. Musc. Alleghan. No. 27, Icones Musc. p. 10, t. 1.—Swamps, Florida to New Jersey.
15. S. sedoides, Brid. Bryol. Univ. 1, p. 750; Sulliv. Musc. Alleghan. No. 208, Icones Musc. p. 11, t. 6.—Bogs, mountainous districts.
16. S. Pylæsh, Brid. Bryol. Univ. p. 749; Sulliv. Icones Musc. p. 12, t. 6.—Same locality as the last; also ponds, New Jersey.—Probably not specifically distinct from the preceding.
17. S. cyclophyllum, Sulliv. & Lesqx. Musc. Bor.-Amer. Exsicc. (ed. 1), No. 5; Sulliv. Icones Musc. p. 13, t. 6.—Swamps, Florida to New Jersey.
