The Philippine Journal of Science, C. Botany. 

 Vol. XI, No. 1, January, 1916. 



THE GENUS LOXOGRAMME 



By Edwin Bingham Copeland 



(From the College of Agriculture, University of the Philippines, 



Los Bonos. P. I.) 



FOUR PLATES 



Loxogramme, as the name of a group of ferns, originated with 

 Blume x who used it for a subgenus of Antrophyum. In dis- 

 cussing the affinity (a curious expression in pre-Darwinian 

 science) of Antrophyum, he points out a resemblance to Gram- 

 mitis, especially to the species (now known as Polypodium) with 

 coriaceus fronds and the sori oblique to the costa, and continues : 

 "Plures adeo Grammitides ut sectionem propriam, a soris obliquis 

 nomine Loxogramme (a Ad£os obliquus et ypa/xpr) linea) insig- 

 nitam, subjungimus Antrophyis." 



As a generic name, Loxogramme dates from Presl, 2 with the 

 following diagnosis. "Venae internae, tenuissimae, ramosis- 

 simae, venulisque in maculas hexagonoideas elongatas inaequales 

 anastomostantes et reticulam laxam efficientes. Sori dorso venae 

 lateralis longioris unius aut duarum supra-positarum inserti, 

 lineares, elongati, crassi, obtusi." He adds that the rhizome is 

 creeping; the fronds coriaceous, simple and entire, and the sori 

 immersed, in the upper part of the frond. 



The first species listed by Blume is Antrophyum lanceolatum, 

 the type of which is Grammitis lanceolata Swtz. It is partic- 

 ularly fortunate that Swartz figured this fern himself 3 for 

 Schkuhr, to whom we turn for figures of many illustrations of 

 Swartz's species, has in this case figured a different fern, not 

 belonging in the same genus, under this name. Blume in turn 

 gives an excellent plate of his fern, which is still another species, 

 but this time at least a Loxogramme. Presl also presents a 

 figure, to illustrate the generic character (1. c. Tab. IX, Fig. 8), 

 and labels it L. lanceolata; but it is the Antrophyum lanceolatum 

 of Blume, not the Grammatis lanceolata of Swartz. 



The first species listed by Presl is Loxogramme coriacea 

 [Grammitis coriacea Kaulf. in Spreng. Syst. Veg. 4 (1827) 71]. 



1 Flora Javae 2 (1828) 73. 



1 Tentamen Pteridographiae (1836) 214. 



* Synopsis Filicum. Plate I, fig. 4. 



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