186 134 
Argentina: Misiones, Loreto, Exman nr. 10 (Rg, S); Bonpland, Exwaw nr. 11 (S) — Alta Graecia, 
Prov. Cordóba, Tu. SrvckERT nr. 2605 (C). 
Paraguay: Arroyo Fogatingo-mi and San Salvador, J. D. Anisirs nr. 2700 (B, W — a form of thinner 
texture and veins 8— 9-jugate). 
195. Dryopteris serra (Sw.) O. Ktze. Rev. Gen. Pl. 2: 813. 1891; 
C. Chr. Ind. 291 pt. 
Syn. Polypodium serra Sw. Prod. 132. 1788; Fl. Ind. occ. 1665. 
Aspidium serra Sw. Schrad. Journ. 1800?: 33. 1801; Mett. Asp. n. 226 
(C. Chr. Ark. for Bot. 9": 34 fig. 9 et tab. 2 fig. 1, illustrating the 
type-specimen). 
Nephrodium serra Desv.; Bak. Syn. 289; Jenm. Bull. Dept. Jam. n. s. 
3: 164. 
Type from Jamaica leg. Swartz (S!). 
In its typical form a most distinct species characterized by its hard, coriaceous 
texture, long and narrow pinne and a distinct terminal pinna. The type-specimen 
belongs to a small form with a proportionally very long terminal pinna and only 
6—8 pairs of lateral pinna, but the species grows much larger. The dimensions 
of the largest specimen seen from Jamaica are: stipe 130 cm long, over 1 cm 
thick at base, lamina about 1 m long, about 40 pairs of lateral pinnz, which are 
25 cm long by 8 mm wide, the terminal pinna 17 cm long; this large form does 
not differ otherwise from the Swartzian type. — Rhizome creeping rather densely 
clothed by hairy scales. Stipe and upper surface of the light-green lamina glabrous, 
rachis deciduously and shortly puberulous by thin hairs, which are often furcate, 
and very sparsely furnished with small scales. The very prominent stramineous 
coste and veins beneath rather densely woolly-pubescent and the coste moreover 
clothed by rather numerous, very narrow and thin ciliated scales. Pinnc scarcely 
reduced towards the base, sessile, the upper basal segment about 1 mm remote 
from the lower one adnate to rachis, very acuminated towards the apex, regularly 
and sharply serrated, most deeply at the middle. Teeth triangular, the edges 
revolute, those of the lower part of the lower pinnz often nearly obsolete. Veins 
very close, prominent beneath, stramineous, 7 —12-jugate, the lower 2—4 connivent 
lo sinus. Sori a little above the middle of the vein, furnished with a pale or red- 
dish, setose, persistent indusium. 
D. serra differs from the related D. oligophylla by its much narrower pinne, 
coriaceous texture and the terminal pinns, the lower pinnez are never reduced 
towards the base in the same manner as in D. oligophylla, with which METTENIUS 
and Kunw united it. The typical form is apparently confined to the larger islands 
and both the small and the large form are found in all islands. 
I have seen the following specimens: 
Porto Rico, SiNTENIS nr. 5826 (B, C, S, W), 5827 (C, W); UNpDERWoop and Gn!iGGs nr, 37 (W). 
Jamaica, near Troy, UNDERWoop nr. 2906 (W) — Mt. Diabolo, Maxon nr. 2330 (W) — Harr nr. 232 
(W) — Hollymount, UxpERwoop nr. 3460 (W) 
