ASPLENIEJE SYNGRAMME. 69 



(26) SYNGRAMME J. Sm. 



Rhizome creeping; fronds simple, and entire or merely sinuate, fertile 

 and sterile alike; veins pinnately arranged, simple or forked, anastomosing 

 near the margin only; sori in unbroken straight rows along the veins, 

 naked. Terrestrial ferns, notable for their ample simple fronds. 



(1) S. vittaeformis J. Sm. Stipes subtufted, not very tall, naked, 

 flexuose, dark brown; frond 20 to 30 cm. tall, 2 to 6 cm. broad, spatulate- 

 oblong, irregularly repand, acute, coriaceous, glabrous; veins fine, parallel, 

 forming one or two rows of distinct areolse near the edge; sori extending 

 from the midrib to the margin. 



Samar, Cuming 329. 



(2) S. alismaefolia (Presl) J. Sm. Rhizome short, clothed with 

 minute chestnut hairs; stipes 20 to 60 cm. high, firm, polished, chestnut- 

 brown; frond 15 to 25 cm. long, 6 to 10 cm. broad, acuminate, entire, 

 with rounded base, coriaceous, glabrous; veins fine, indistinct where they 

 unite, near the margin; sori on all the veins, from the midrib to where 

 they unite. 



Luzon, Haenke; Gimogon River, Negros, Copeland 75. 

 Singapore. 



(3) S. Wallichii Hooker (sub Gymnogram. ) . Rhizome creeping under- 

 ground; stipes subfascicled, 15 to 40 cm. high, ebeneous; fronds subco- 

 riaceous-membranaceous, simple, 15 to 25 cm. long, 3 to 5 cm. broad in 

 the middle, broadly lanceolate or subelliptico-acuminate, entire, cuneate- 

 attenuate at the base; veins numerous, approximate, simple or forked, 

 anastomosing only near the margin, forming rarely more than 2 series 

 of oblong, hexagonal areolse; sori narrowly linear, on all the straight 

 veins, but hardly extending to the anastomosing ones. Distinguished 

 from S. alismaefolia by the longer fronds and the tapering base. 



Jolo Archipelago, Burbidge. 

 Singapore and Borneo. 



(27) CALLIPTERIS Bory. 



Rhizome short, erect; fronds accordingly in clusters, simple, pinnate, 

 or bipinnate; veins from neighboring clusters anastomosing; sori as in 

 Diplazium, that on the lowest acropetal branch double, the others single 

 as in Asplenium. Terrestrial ferns, mostly with large glabrous fronds. 



Callipteris is combined with Diplazium by Diels, and both are included 

 in Asplenium in Synopsis Filicum. Underwood says twelve species are 

 known from the Philippines. Beside those here described, Presl enumerates 

 Microstegia ambigua, M. serrulata, and Callipteris attenuata. 



1. Simple, or with terminal pinnae like lateral. 



2. Cordate, lateral pinnae at most 2 pairs (1) C. cordifolia 



2. Not cordate. 



3. Lateral pinnae at most 3 pairs, veins about 3 



together (2) C. aUsmaefolia 



3. Lateral pinnae at most 6 pairs, veins 4 to 8 



together (3) C. elegans 



