Ferns. 181 



Lindsaya Dry. 



1. Lindsaya Mcrrillii Copeland n. sp. Rhizomate valido, scaii- 



dente, nifo-brunneo, nitente, squamulis ferrugineis patentibus 

 vestito vel subglabro; stipitibus 2 — 5 cm altis, validis, siib- 

 squamulosis, sursum rhachique stramineis; froiide ca. 80x4 cm, 

 pinnata; pinnis altemantibus rarius oppositis, inf eiiori bus petio- 

 latis, majoribus 22 mm latis, 9 mm altis (apud rhachiii), dimi- 

 diatis, basibus valde attenuatis, apice saepius acuto, margine 

 infra iiitegra, supra inciso-creuata, membrauaceis, glabris; 

 venis liberis; soris lobos siibterminantibus. 



Mindoro Isl., Baco River, on tbe truniis of trees in a 

 moist forest (Merrill no. 1774 type); Luzon Is!., Prov. Benguet, 

 Sablcin (Elmer no. 6124). 



2. Lindsaya gracillima Copeland n. sp. Rhizomate brevi, sub- 



terraneo; stipitibus dense fasciculatis, erectis, brunueis, sub- 

 glabris, 5 cm altis; fronde j)innata anguste lineari, ca. 320x9 mm, 

 glabra; pinnis altemantibus, petiolatis, triangularibus vel rhom- 

 boideis, 4 mm latis, 3 mm altis, deorsum diminutis, infra rectis 

 integris, supra rotundatis, integris vel sterilibus profunde cre- 

 natis, venis liberis, flabellatis; textura herbacea; soris continuis 

 vel subinterruptis, marginalibus. 



Luzon Isl., Caraballo Sur, on shady ground, 800 m. s. m. 

 (Merrill no. 287). 



By far the most slender species. 



3. Lindsaya ciiltrata Sw., var. varia Copeland n. var. A typo 



diifert fronde stipiteque multo minoribus, textura membranacea, 

 pinnarum formaque variabilissima. 



Luzon Isl., Prov. Benguet, Bagufo, growing on stones 

 near brooks (Elmer no. 6003 type, Topping no. 191 and no. 198). 



Different plants are exceedingly variable in the shape of 

 the pinnae, which, as a rule, are sti'ongly adscendent. One re- 

 markable and not infrequent form has them falcate, with a 

 single composite sorus occupying the concave, contracted upper 

 edge, flanked at each side by a tooth. They are always broadest 

 next the rachis. The color is pale, sometimes even yellowish. 

 Beside entire pinnae, there are variously incised ones, some- 

 times suggesting L. Loheriana Christ, which they resemble in 

 all respects, except that they are not deeply bifid. Infrequent, 

 large forms intcigi'adc insensibly with L. ciiltrata. 



