68 POLYPODIACB^ OF THE PHILIPPINE ISLANDS. 



(25) LOXOGRAMME Presl. 



Fronds somewhat clustered, not articulate to the rhizome, simple and 

 entire, sessile or nearly so; veins immersed, anastomosing irregularly to 

 form large areolae with few or no included free veinlets, no main veins; 

 sori elongate, forming an acute angle with the costa or even parallel to 

 it, exindusiate. 



Loxogramme is combined with SelUgtiea as a part of Gymnogramme in 

 Synopsis Filicum, and buried with it by Diels in Phymatodes. It differs 

 more than ordinarily generically from Selliguea in the venation and the 

 absence of articulations to the rhizome. The type species, L. lanceolata, 

 was more reasonably placed by Blume in Antrophyitm. Placing all these 

 exindusiate genera in the Aspleniece is arbitrary. 



(1) L. involuta (Don.) Presl. Rhizome short-creeping, stout, clothed 

 with dull brown, lanceolate, acuminate scales; frond 30 to 45 cm. high, 5 

 to 6 cm. broad, subacute, somewhat repand and inclined to roll upward, 

 gradually attenuate to the base, very leathery, glabrous; costa stout and 

 prominent, veins invisible; sori oblique, almost reaching the costa and 

 margin. 



Rizal, Merrill 2663; Davao, ^yarhurg 141 IG, Copeland 961. 

 India to Polynesia. 



(2) L. lanceolata (Blume) Presl. Rhizome creeping, clothed with dull 

 brown linear scales; frond 15 to 30 cm. high, I to 2 cm. broad, acute, 

 entire, narrowed imiformly from well above the middle to the sessile 

 base, coriaceous but flaccid, glabrous, bright green; costa evident but not 

 stout, veins hidden; sori very oblique, falling well short of margin. 



Benguet, Loher, Elmer 6276; Mount Mariveles, Copeland 1406. 

 Africa to Japan and Polynesia. 



(3) L. parallela Copeland. Rhizome short-creeping, clothed with ashy 

 brown, lanceolate, acuminate scales; fronds linear, about 15 cm. high, 

 6 mm. broad, straight or sinuate, acuminate, entire, gradually attenuate 

 to the subsessile base, coriaceous, glabrous; costa conspicuous below, veins 

 invisible, free included veinlets none; sori oblong, in a single series on 

 each side of the costa, near and almost or quite parallel to it. 



IMount Santo Tomas, Benguet, Elmer 6569. 



(4) L. conferta Copeland. { Drymoglossum, Copeland in Perkins' 

 Fragmenta, Fas. Ill, 1905.) Rhizome slender, intricate, clothed with 

 small, thin, brown, lanceolate, acuminate scales; fronds short stalked, 

 forming a dense mat, coriaceous, the veins forming a few areolae without 

 free included veinlets, the sterile frond ecostate, elliptical, IS mm. long, 13 

 mm. broad, apex round, base cordate, fertile frond 25 by 3.5 mm., apex 

 round, base attenuate; sori midway between costa and margin, covering 

 the entire lamina when old. 



Catalonan, Davao, Copeland 942; San Ramon, Zamboanga, Copeland 

 1583. The San Ramon plants are the younger, and show the real affinity 

 to Loxogramme. But it is a very foreign element in this genus. 



