52 A FLORA OF MANILA 



Very connnonly cultivated as a hanging plant, variable in size; throughout 

 the Philippines. Tropical Asia and Africa to Polynesia. 



2. A. macrophyllum Sw. 



Rootstock short, covered with linear-lanceolate, acuminate scales. Stipes, 

 tufted, rigid, erect, brown, glabrous or nearly so, 3 to 30 cm long. Frond 

 simply pinnate, oblong in outline, 7 to 40 cm long; pinnae opposite or 

 alternate, 2 to 12 on each side, spreading, shortly stalked, subcoriaceous, 

 2 to 15 cm long, 1 to 3 cm wide, lanceolate, long-acuminate, somewhat 

 falcate, the base inequilateral, cuneate, the margins sharply and irregularly 

 serrate; veins very oblique. Sori in close, long, parallel, oblique lines 

 reaching from the midrib nearly^ to the margin. 



In dry thickets, near Fort McKinley, San Juan del Monte, Masambong, 

 etc. ; widely distributed in the Philippines. Tropical Asia to Polynesia. 



6. HEMIONITIS Linnaeus 



Erect, terrestrial, tufted ferns with entire or lobed fronds, the fertile 

 ones different in shape from the sterile, the stipes not jointed to the root- 

 stock. Veins distinct, copiously anatomosing, the sori continuous along 

 the veins, reticulate, linear, the indusium wanting. (Greek "mule," these 

 ferns originally supposed to be sterile.) 



Species about 8, in the tropics of both hemispheres, 1 in the Philippines. 



1. H. arlfolla (Burm.) Moore. 



Rootstocks erect, the scales linear-lanceolate. Stipes slender, shining, 

 dark-brown, with scattered, spreading hairs. Fronds dimorphous, the 

 sterile ones elliptic to oblong-elliptic, base deeply cordate, apex rounded, 

 entire, 4 to 10 cm long, 2 to B cm wide, their stipes 3 to 10 cm long, the 

 fertile fronds somewhat smaller than the sterile ones, triangular-ovate to 

 elliptic-ovate, obtuse, the base often sagittate, the basal lobes spreading, 

 or deflexed, rounded, very prominently reticulate on the lower surface, the 

 sori covering the veins; stipes longer than in thfe fertile fronds, 10 to 30 

 cm in length.' 



In dry thickets, banks of ravines, etc., Masambong to San Juan del 

 Monte; of local occurrence in the Philippines. Tropical Asia to Malaya. 



7. CEROPtERIS Link 



Erect, tufted, terrestrial, finely divided ferns from short, creeping or 

 suberect rootstocks, the stipes not jointed to the rootstock. Fronds small 

 to medium size, pinnately divided, the under surface covered with a white 

 or yellow waxy powder. Sori linear to linear-oblong, along the veins but 

 not quite reaching their tips the indusium wanting. {Greek "wax" and 

 "fern.") 



Species about 8, chiefly in tropical America, 1 introduced in the Philip- 

 pines. 



1. C. CALOMELANOS (L.) Underw. 



Rootstock short, suberect, with few brown scales, th% stipes tufted, 

 dark-brown or purplish, polished, stiff, angular, 5 to 25 cm long. Fronds 

 oblong, acuminate, 10 to 50 cm long, bipinnate to tripinnatifid, the pinnsie 

 4 to 15 cm long, lanceolate, the lowest ones the largest, the upper ones 

 gradually shorter, somewhat falcate, stalked, pinnate below, pinnatifid 



