182 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
El Valle, Miller & Johnston, no. 155, Aug. 2; San Juan Mt., alt. 
400 m., Johnsion, no. 160, July 16. American tropics; ubiquitous. 
DiPLAZIUM S\v. 
D. ARBOREUM OViUd.) Presl, Tent. Pterid., p. 114 (1836), not of 
most authors. Asplenivm arboreum Willd., Sp. pi., vol. 5, j). 320 
(1810). A. Shepherdi Sprang., Nov. act. acad. Caes. Leop., vol. 10, 
p. 231, pi. 17, figs. 5 and 6 (1821). Diplazium Shepherdi Link, 
Hort. BeroL, vol. 2, p. 70 (1833). — Juan Griego trail, alt. 450 m., 
Johnston, no. 158, July 29. Tropical America. 
D. CRENULATUM Licbm. Vid. selsk. skr., ser. 5, vol. 1, p. 254 
(1849). Earlier synonymy much confused: the Linnaean name not 
available. Referred under D. striatum (L.) Presl by Urban (Symb. 
Ant., vol. 4, p. 33 (1903) as occurring on Margarita Island. — El 
Valle, Miller & Johnston, no. 161, Aug. 16; Juan Griego trail, alt. 
450 m., Johnston, no. 153, July 29. Tropical America. 
D. GRANDIFOLIUM Sv^^. in Schrad., Journ. bot., 1800, pt. 2, p. 62 
(1801). Asplenium grandifolium, Sw., Prod. veg. Ind. Occ, p. 130 
(1788). — Juan Griego trail, alt. 450 m., Johnston, no. 159, July 29. 
Tropical America. 
Dryopteris Adans. 
D. AMPLA (H. & B.) Ktze., Rev. gen., vol. 2, p. 812 (1891). Poly- 
podium amplum H. & B. ex Willd., Sp. pi., vol. 5, p. 207 (1810).— 
El Valle, Miller & Johnston, no. 169, Aug. 2; Juan Griego trail, 
alt. 450 m., Johnston, no. 187 in part, July 29. Tropical America. 
Florida. 
D. Johnston: Maxon, Contrib. U. S. nat. herb., vol. 10, p. 498 
(1908).— Juan Griego trail, alt. 450 m., Johnston, no. 192, July 22 
(type). Known also from Trinidad, Jenman; Fendler, no. 54. . 
D. MEGALODUS (Schkuhr) Urb., S}Tnb. Ant., vol. 4, p. 21 (1903). 
Polypodium megalodus Schkuhr, Krjq^t. Gewachse, vol. 1, p. 24, pi. 
19b (1S06).— El Valle, Miller & Johnston, no. 164 in part. Tropical 
America. 
D. PARASITICA (L.) Ktze., Rev. gen., vol. 2, p. 811 (1891). 
Polypodium parasiticum L., Sp. pi., vol. 2, p. 1090 (1753). Neph- 
rodiinn parasiticum Desv., Mem. soc. Linn. Paris, vol. 6, p. 260 (1827). 
Polypodium molle Jacq;, Coll. bot., vol. 3, p. 188 (1789), not Schreb. 
(1771), nor All. (1785). N ephrodium molle R. Br., Prod. fl. Nov. 
