213 265 
a subacute angle in an excurrent branch, to which the next 2—3 alternately joint, 
and which run to the base of a hyaline membrane, to which the following 3—4 
veins run out. Sori medial, small; sporangia selose by 2—4 short, simple sete. 
I have seen a trace of a small, ciliate indusium. 
Costa Rica, without locality, WrEnckrÉ 1904 and 1905 (C Jiménez, Llanos de Santa Clara, Comarca 
de Limón, 200 m, DonNELL SwurrH nr. 5094 (W) — Suerre, Llanuras de Santa Clara, 300 m, 
DoNNELL SwrrH nr. 6928 (W). 
L 
265. Dryopteris Poiteana (Bory) Urban, Symb. Ant. 4: 20. 1903; C. Chr. Ind. 285. 
Syn. Lastrea Poiteana Bory, Dict. class. 9: 233. 1826. 
Polypodium crenatum Sw. Prod. 132. 1788; Fl. Ind. occ. 1661. Hk. Bak. 
Syn. 315; Jenm. Bull. Dept. Jam. n. s. 4: 133. 1897 (non Forskal 1775). 
Phegopteris crenata Mett. Fil. Lips. 84. 1856. 
[PruwrER, Fil. tab. 111]. 
The type of Lastrea Poiteana Bory | have not seen, but there is no reason to 
doubt that it is the same as Polypodium crenatum Sw., which was collected by 
Swartz in Jamaica (S!) and which I take for the type of the species. 
A well-known species, well described by JENMAN (loc. cit.) and others. The 
creeping rhizome is naked or clothed with some few scales, which bear some fur- 
cate hairs on the edges. The lamina, consisting of 3—6 pairs of lateral pinnz 
about 4 cm broad and similar terminal one is more or less softhairy beneath, 
especially on costze and veins, glabrous or with a few setze on the veins above; hairs 
simple. Costules prominent, stramineous. Margins subentire, crenate or broadly and 
shallowly serrate, rarely lobed. Veins 6—8-jugate, distant, the lower 2—4 pairs up- 
curved and anastomosing under an acute angle and meniscioid, the next 2—3 pairs 
alternately united into a common branch or often interrupted before meeting the 
opposite vein. Sori a little below the middle of the vein; sporangia when young 
furnished by 4—6 long, simple hairs. In the same sorus one finds as well quite 
young sporangia as rife ones and intermediate states. 
D. Poiteana varies mainly in pubescence; some specimens are almost glabrous 
and then resemble D. meniscioides, others, especially the andine specimens, much. 
hairy and difficult to distinguish from D. Ghiesbreghtii; still I think it possible to 
determine specimens of these three species by the venation; in D. Potteana rarely 
more than 4 pairs of veins are meniscioid and meet under acute angles; in the two 
other species 8—10 or more pairs of veins are meniscioid and meet under broad 
angles, and their sporangia seem to be glabrous even as young. 
Goniopteris Rivoirei Fée, Gen. 2535 1850— 52; 11 mém. tab. 18 fig. 2 from Gua- 
deloupe seems according to the figure and a specimen in (B) so named to be a 
small form of D. Poiteana with large sori. JENMAN believed it to be D. obliterata, 
while BAKER (Ann. of Bot. 5: 460. 1891) restored it as a species. It must, however, 
be remarked, that the two reduced figures of the whole plant of Gon. Rivoirei and 
