182 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
El Valle, Miller & Johnston, no. 155, Aug. 2; San Juan Mt., a 
400 m., Johnston, no. 160, July 16. American tropics; ubiquitous. 
DieLazium Sw. 
D. arBoreum (Willd.) Presl, Tent. Pterid., p. 114 (1836), not ¢ 
most authors. Asplenium arboreum Willd., Sp. pl., vol. 5, p. 320 
(1810). A. Shepherdi Spreng., Nov. act. acad. Caes. Leop., vol. 10, 
p. 231, pl. 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. a 
D. crENULATUM Liebm. 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.— 
Valle, Miller & Johnston, no. 161, Aug. 16; Juan Griego trail, alt. 
450 m., Johnston, no. 153, July 29. ‘Tropical America. ; 
D. @ranpiro.ium Sw. in Schrad., Journ. bot., 1800, pt. 2, P- | 
(1801). Asplenium grandifolium Sw., Prod. veg. Ind. Oce., p- 130° 
(1788).— Juan Griego trail, alt. 450 m., Johnston, no. 159, July 29. 
Tropical America. 
Dryoptreris Adans. 
D. ampta (H. & B.) Ktze., Rev. gen., vol. 2, p. 812 (1891). Por 
podium amplum H. & B. ex Willd., Sp. pl., vol. 5, p- 207 (1810 
El Valle, Miller & Johnston, no. 169, Aug. 2; Juan Griego rs 
alt. 450 m., Johnston, no. 187 in part, July 29. Tropical Americ 
Florida 
D. Jounstonr Maxon, Contrib. U. S. nat. herb., vol. 10, ere 
(1908).— Juan Griego trail, alt. 450 m., Johnston, no. 192, July 2 
(type). Known also from Trinidad, Jenman; Fendler, no. 5h 
_D. megatopus (Schkuhr) Urb., Symb. Ant., vol. 4, p- 21 ( 
Polypodium megalodus Schkuhr, Krypt. Gewiichse, vol. 1, p- 24 
19b (1806).— El Valle, Miller & Johnston, no. 164 in part. *™ 
America. 
D. parasitica (L.) Ktze., Rev. gen., vol. 2, p- Sil (1891). 
Polypodium parasiticum L., Sp. pl., vol. 2, p. 1090 (1753). Ne it 
rodium parasiticum Desv., Mém. soc. Linn. Paris, vol. 6, P- 260 ( oun 
Polypodium molle Jacq., Coll. bot., vol. 3, p. 188 (1789), not Pe 
(171), nor All. (1785). Nephrodium molle R. Br., Prod. fl 
