34 CARL CHR1STENSEN AND CARL SKOTTSBERG 



is = Histiopteris. Thus it is impossible to understand why he identified P. 

 fernandeziana with his chilensis. 



Area of distribution: South Chile, Prov. Maule to Valdivia; Juan Fer- 

 nandez. 



38. P. semiadnata Phil Linnaea 29: 106 (1857); C. Chr. Ind. 607. — 

 Syn. P. flexnosa Mett. Fil. Lechl. 1: 12 (1856) non Klf. 1830; P. 7)iaratliaefolia 

 Hook. Sp. Fil. 2: 177 tab. 122 B (1858); Hemsl. 71; Johow 1S93: 25, 1896: 197. 



Characteristic of the foggy region above 500 m, in Masafuera also in the 

 alpine heath, very local. (Fertile Jan. — April.) 



Masatierra: Densely wooded, damp quebradas on the highest part of 

 C. Centinela, c. 660 m (no. 613); C. Salsipuedes, Q. Helechos in Drimys- 

 Dickso7iia-(orest, c 600 m, a beautiful stand (no. 280). — Germain without 

 locality. 



; Masafuera: O. del Mono, c. 400 m (no. 543), forest ravine; Q. del Blin- 

 dado, forest, 440 m; C. del Barril, rock crevices above 800 m; Q. Inocentes, 

 under Dickso7iia near the stream; the Correspondencia Camp, in the ravine 

 1 160 m; edge of western precipice, at the foot of Las Torres among rocks, 

 1370 m (no. 438). — New for Masafuera. 



The occurrence in the islands of this pretty, distinct species, recorded by 

 HEMSLEY from specimens collected by GERMAIN, was doubted by Johow, who 

 suspected the locality to be false. The question is now settled by the redisco- 

 very of the species. The specimens are identical with those previously collected 

 by SKOTTSBERG in the island of Huafo, perhaps with the sterile tips of the 

 pinnules more grossly serrate, at least much more deeply and broadly serrate 

 than shown in Hooker's figure. The fertile edges are regularly crenate, often 

 prolonged beyond the brownish green, continuous indusium, which generally 

 is crenate with the crenae covering the nearly globose, rarely confluent sori, 

 that arise from the tips of the veins. In the sori the species resembles Casse- 

 bee7-a, but the whole habit is that of Pteris. It is a very large plant. The 

 base of the stipe is clothed with dark brown, opaque, lanceolate and entire scales. 



We do not know any species of Eupteris nearly related to P. semiadnata. 

 We cannot agree with METTENIUS in considering it »ex affinitate P. chilensis», 

 but it resembles some large Andine species of Litobrocliia, especially the 

 Mexican P. pulchra Schlecht. We are of the opinion that the subgenera of 

 Pteris, based solely upon the venation, are very unnatural, and that it is quite 

 natural to associate the free-veined P. semiadnata with P. pulcTira and its allies, 

 which have anastomosing veins. 



Area of distribution: South Chile, Valdivia to Isla Huafo; Juan Fer- 

 nandez. 



39. P. Berteroana Agardh, Rec. Gen. Pteridis 66 (1839); C. Chr. Arkiv 

 for Bot. 10: 20 (1910). -- Syn. P. tenera Bertero ex Colla 1836: 38 (t. Ag. 7ion 

 Kaulf.); LitobrocJiia decurrens Gay 6: 491 (ex. descr., 71071 Presl); Pteris comans 

 Hemsl. 70; Johow 1893: 25 f. 8, 1896: 257; P. incisa Johow 1893: 24 f. 6 (t. 

 spec. orig.!). 



