108 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. 



(48) ANTROPHYUM Kaulfuss. 



Rhizome short, creeping, clothed with copious very narrow brown palese; 

 fronds clustered, simple, entire, rather thick; veins anastomosing, without 

 free included veinlets; sori along the veins, in general lengthwise of the 

 leaf and anastomosing with the veins. Aside from Vittaria, the nearest 

 relatives of Antrophyum in our flora are Loxogramme, treated by Blume 

 as a section of it, and Hemionitis, under which the first species were 

 described. The species are variable, and not at all sharply distinguishable. 



1. Stipe long (10 cm.) (1) A. plantagineum 



1. Stipe short or none. 



2. Costa reaching half way up the frond (2) A. semicostatum 



2. Costa disappearing near base of frond. 



3. Apex broadly rounded (3) A. obtuswn 



3. Apex obtuse or acute. 



4. Frond broad, sori free (4) A. callaefolium 



4. Narrow or sori anastomosing. 



5. Frond very thick (5) A. coriaceum 



5. Frond only moderately coriaceous. 

 6. Frond small (15 cm.), stip- 



itate, sori free (6) A. parvulum 



6. Frond larger, sori usually 



anastomosing (7) A. reticulatum 



(1) A. plantagineum Kaulf. Stipes stout, glabrous, about 10 cm. 

 high; fronds 10 to 20 cm. long, one-third as broad, broadest above the 

 middle, acute at both ends, very fleshy when fresh; costa wanting but 

 median line of frond sterile; sori copious, deeply immersed, anastomosing 

 somewhat. 



Rizal, Loher; southern Luzon, Baranda; Davao, Copeland 632. 

 India across Polynesia. 



(2) A. semicostatum Blume. Frond 15 to 40 cm. high, 5 to 8 cm. broad, 

 broadest near the apex, narrowed abruptly to the acute apex, and gradually 

 to the base or short stipe; costa blackish, visible half way up the frond; 

 sori copious, anastomosing freely, rising above the surface. 



Sorsogon and Catanduanes, Baranda. 

 Ceylon across Polynesia. 



(3) A. obtusum Kaulf. Fronds 2 to 6 cm. high, spatulate, gradually 

 contracted from the broad, rounded apex to a short stipe, thin-coriaceous, 

 very young fronds black-hairy; costa entirely wanting; sori in grooves 

 but rising well above surface, forking, and sometimes anastomosing. 



Davao, Copeland 845, 931; Paragua, Merrill 786. 

 Bourbon, Java. 



(4) A. callaefolium Blume. Fronds 15 to 30 cm. high, 4 to 8 cm. broad, 

 "spatulate-lanceolate," abruptly contracted to the acuminate or obtuse 

 apex, gradually to a base decurrent on a short stipe, coriaceous; costa 

 wanting; sori free, rather straight. 



Rizal, Loher; Davao, Warburg 14161, DeVore and Hoover 277, Copeland 

 1253. 

 Java, Celebes. 



