JOHNSTON: FLORA OF MARGARITA ISLAND. 185 
N. RivuLARis (Vahl) jNIett. ex Krug in Engl., Bot. jalirh., vol. 24, 
p. 122 (1897). Polypodium rivulare Vahl, Eel. Am., vol. 3, p. 51 
(1807). Aspidium ,<^esqnipedah Willd., Sp. j)!., vol. 5, p. 230 (1810). 
Nephrolepis sesquipedaUs 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. 
HYMENOPHYLLACEAE. 
Hymenophyllum J. E. Sm. 
H. POLYANTHOS Sw. in Schrad., Journ. 1800, pt. 2, p. 102 (1801). 
Trichomanes poli/anthos Sw., Prod. veg. Ind. Occ, p. 137 (1788). — 
El Valle, Miller & Johnston, no. 157, July 31; Juan Griego trail, alt. 
500 m., Johriston, 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 (Sjaiib. Ant., vol. 4, p. 9) as occurring on jNIargarita, this being 
his determination of Miller & Johnston's material of 1901. The 
specimen in question may possibly be referable, however, to Tricho- 
manes. 
H. KoHAUTiANUM Presl, Hymenoph., j). 32 and p. 50 (1843). 
Referred by Urban to Margarita. See note on preceding species. 
Trichomanes L. 
T. ALATUM Sw. in Schrad., Journ. bot., 1800, pt. 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. MEMBRAXACEUM L., Sp. pi., vol. 2, p. 1097 (1753). — Juan Griego 
trail, alt. 4.50 m., Johnston, no. 15, Aug. 12-15. Tropical America. 
T. POLYPODioiDES L., S]). 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. 
