ALSO PHIL A. 



345 



down half or two-thirds of the way to their midrib) ; their lobes are 



oblong-egg-shaped, often acutely serrulate (sharply toothed), and their 



midrib shows on the under-surface some scales of a bullate (blistered) 

 appearance. The sori (spore masses), of a very deciduous nature, are 



situated half-way between the costa (midrib) and the margin of the fertile 



pinnules. — Hooker, Species Filicum, i., p. 39, t. 19b. Nicholson, Dictionary 

 of Gardening, L, p. 55. 



Fig. 52. Alsophiia atrovirens 



(much reduced). 



A. aterrima — a-ter'-riin-a (very black), Hooker. 



This East Peruvian, stove species, native of Tarapota, is stated by Hooker 

 and Baker to be the blackest-looking species, when dry, with which these 

 authorities are acquainted. Its stalks are copiously aculeate (very prickly), 



2 T 



