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 setose by 2 — 4 short, simple setæ. 

 I have seen a trace of a small, ciliate indusium. 



Costa liica, without locality, Wercklé 1904 and 1905 (C) — Jimenez, Llanos de Santa Clara, Comarca 

 de Limon, 200 m, Donnell Smith nr. 5094 (W) — Suerre, Llanuras de Santa Clara, 300 m, 

 DoNNELL Smith nr. 6928 (\V). 



265. Dryopteris Poiteana (Bory) Urban, Symb. Ant.4: 20. 1903; C. Chr. Ind. 285. 



Syn. Lastrea Poiteana Bory, Diet, class. 9: 233. 1826. 



Polypodiiim crenatiim Sw. Prod. 132. 1788; Fl. Ind. occ. 1661. Hk. Bak. 

 Syn. 315; Jenm. Bull. Dept. Jam. n. s. 4: 133. 1897 (non Forskål 1775). 



Phegopteris crenata Mett. Fil. Lips. 84. 1856. 



[Plumier, Fil. tab. 111]. 

 The type of Lastrea Poiteana Bory I have nol 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 pinnae 

 about 4 cm broad and similar terminal one is more or less soft-hairy beneath, 

 especially on costæ and veins, glabrous or with a few setæ 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 slates. 



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. Ghieshreghtii; still I think it possible to 

 determine specimens of these three species by the venation; in D. Poiteana 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 1). Poiteana with large sori. Jenman believed it to be D. obliterata, 

 while Baker (Ann. of Bol. ö: 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 



