160 108 
Gymnogramme microcarpon Fée, 7 mém. 43 tab. 20 fig. 5. 1857. 
Polypodium velutinum Sod. Rec. 59. 1883; Cr. vase. quit. 292. 1893! 
Polypodium Percivalii Jenm.; Bak. Ann. of Bot. 5: 456, 1891! 
Dryopteris Percivalii C. Chr. Ind. 284. 1905. 
LiNNAEUS founded this well-known species on “Petiv. fil. 61 t. 2 f. 5", a work 
to which I have no access, but all later authors quote also PruwiEkn tab. 24, which 
plate illustrates a plant from Martinique and which is our species. 
A very large species with fronds up to 3' m long and pinne 30—45 cm 
long by 4 cm broad. Stipe strong, generally muricate, scaly below and like the 
rachis downy by short, simple, deciduous hairs; in some (or all?) specimens the 
stipe bears some long, projecting aérophores. Margins and coste above densely 
hairy by long, soft hairs, coste and costule beneath slightly and shortly pubescent 
becoming. glabrous; under-surface covered with red, sessile, deciduous glands. 
Pinnz sessile, linear with nearly parallel edges, the aérophore at base thorn-like, 
1 cm long. Segments patent, 2 cm long, 3—4 mm broad with an obliquely 
rounded apex, i. e. the posterior side being bluntly rounded, the anterior one 
forming about a right angle with the anterior edge, a threadlike aérophore, 2—3 
mm long, is found at the base of the costules beneath; basal segments generally 
somewhat reduced. Veins 25—40-jugate, very close. Sori inframedial or subcostu- 
lar, exindusiate: receptacles somewhat elevated, oblong; sporangia glabrous, red- 
dish, loose. 
The form described here is the typical one, to which belong the following 
specimens: 
West-Indian Islands: Martinique, IseRnT (H); SreBER nr. 189, 349 (B — P. grammicum Spr.); 
L. Haun nr. 41 (B) — Guadeloupe, L'HEnMiNIER nr. 173 (B, C); LENonMAND (B); DucHas- 
saiNG (B) — Montserrat, Ryan (H) — Dominica, EcGEns nr. 629 (B); F. E. Lrovp nr. 
349 (W) — St. Vincent, EccEns nr. 6805 (W); H. H. & G. W. SurrH nr. 43 (W) — 
Grenada, EccEns nr. 6388 (C, W); Broapway (W) — Porto Rico, SiNTENIS nr. 1787 
(C) 4592 (B, W) — Jamaica, H. SwrrH nr. 436 (B); Harr nr. 195 (W); CruTE nr. 163 
(W); A. FnEDHOLM nr. 3343 (W); UnpERwoop nr. 1361 (W). 
Guiana, LeprieuR (B, W) — Mt. Russell, Pomeroon River, Demarara, JENMAN nr. 2080 (Kew = 
P. Percivalii Jenm.), 
Venezuela, Funck nr. 771 (B); KansrEN nr. 166 (B). 
Costa Rica, La Palma, MAxon nr. 443 (W); Wrnckr£ (C, CC). 
Most Andine specimens differ from the type by the more densely pubescent 
rachis and coste, more remote and more acute segments and apparently fewer 
glands on the underside. 
A specimen from Soprro, named by himself P. velutinum Sod. belongs to 
this form, which I therefore call 
f. velutina (Sod.) 
Ecuador, Sopiro (C) — Peru: San Gavan, LECHLER nr. 2356 (B). 
Costa Rica: La Palma, Tonpuz nr. 12639 (C, W) — Carillo, PrrrigR et Tonpuz nr. 1165 (C). 
