JOHNSTON: FLORA OF MARGARITA ISLAND. 185 



N. RivuLARis (Vahl) Mett. ex Krug in Engl., Bot. jahrb., vol. 24, 

 p. 122 (1897). Polypodimi rividare Vahl, Eel. Am., vol. 3, p. 51 

 (1807). Aspidium sesquipedale Willd., Sp. pi., vol. 5, p. 230 (1810). 

 Nephrolepis sesquipedalis Presl, Tent. Pterid., p. 79 (1836). — El 

 Valle, Miller & Johnston, no. 167, Aug. 2; Juan Griego trail, alt. 

 450 m., Johnston, no. 163, July 22. Tropical America. 



HY]VIENOPHYLLACEAE. 

 Hymenophyllum J. E. Sm. 



H. POLYAXTHOS Sw. in Schrad., Journ. 1800, pt. 2, p. 102 (1801). 

 Trichomanes polyanthos Sw., Prod. veg. Ind. Occ, p. 137 (1788). — 

 El Valle, Miller & Johnston, no. 157, July 31; Juan Griego trail, alt. 

 500 m., Johnston, no. 165, July 2. Porto Rico: Urban, Symb. Ant., 

 vol. 4, p. 8. Widespread in the tropics, the typical form being West 

 Indian. 



H. ciLiATUM Sw. in Schrad., Journ. bot., 1800, pt. 2, p. 100 (1801) 

 et Fl. Ind. Occ, vol. 3, p. 1753 (1806). — This species is reported by 

 Urban (S}inb. Ant., vol. 4, p. 9) as occurring on ^Margarita, this being 

 his determination of INIiller & Johnston's material of 1901. The 

 specimen in question may possibly be referable, however, to Tricho- 

 manes. 



H. KoHAUTiANUM Presl, Hjiiienoph., p. 32 and p. 56 (1843). 

 Referred by Urban to Margarita. See note on preceding species. 



Trichomanes L. 



T. ALATUM Sw. in Schrad., Journ. bot., 1800, i)t. 2, p. 97 (1801).— 

 Ric Asuncion, alt. 450 m., Johnston, no. 145, July 29. Tropical 

 America: the type from Jamaica. Variable. 



T. CRiSPUM L., Sp. pi., vol. 2, p. 1097 (1753).— San Juan Mt., 

 alt. 600 m., Johnston, no. 171, July 2. Tropical America. 



T. MEMBRANACEUM L., Sp. pi., vol. 2, p. 1097 (1753). — Juan Griego 

 trail, alt. 450 m., Johnston, no. 15, Aug. 12-15. Tropical America. 



T. POLYPODioiDES L., Sp. pi., vol. 2, p. 1098 (1753). T. sinuosum 

 Rich, ex Willd., Sp. pi., vol. 5, p. 502 (1810); Hook. & Grev., Ic. 

 Fil., vol. 1, pi. 13 (1831). — Rio Asuncion, alt. 450 m., Johnston, no. 

 175, Aug. 12-15. Tropical America. 



