CYATHEACEJE. 155 



bus cum terminali conformibus sed paullo minoribus, petiolulis 5-8 mm. longis 

 hand dilatatis hand articulatis haud geniculatis teretibus in exsiccato fuscentibus. 

 Sori lineares 10-12 mm. longi seeus venulas siti ; sporangiis 60-70 2-seriatim 

 dispositis, sub son's pilis sparce sitis ; costa pinnse utraque pagine plus minus 

 elevata. 



HAB. Urai, leg. T. SOMA et B. HAYATA, Mai. 1916. 



Resembles Archangiopteris Henryi CH. et GIES. in having simply pinnate 

 fronds with linear sori ; but differs from it by the much shorter and not 

 tumid petioles of the pinnae, in the very much longer apical tails of the latter, 

 in the geniculate stipes with stipules at their very base, and in the less hairy 

 sori which in our species are located much nearer to the costa than to the 

 margin. Our species is, as a whole, much nearer to Angiopteris tlian A. Henryi 

 is to the latter. The resembrance of our new fern with a simple pinnate form 

 of Angiopteris erecta in its young stage is really very remarkable. The form 

 of the stipules and the geniculation of the stipes are very similar in the two. 



Cyatheaeeae. 



There are in Formosa four genera belonging to this family. Dicksonia 

 and Cibotium are distinctly distinguished from the other genera even in sterile 

 specimens. Oyathea and Alsophila are on the other hand much confused in 

 the field, when they are not in fertile specimens. Eight species of Alsophila 

 are recorded from Formosa, while Oyathea is represented only by one, C. 

 spinulosa WALL. As far as I can judge from my field-knowledge, there 

 exist in Formosa only three species of Alsophila and one species of Oyathea, 

 i. e. A. fwmosana, A. podophylla, A. latebrosa and C. spinulosa. The first 

 two species are distinguishable from the others by the much shorter stems not 

 marked by the leaf-scars. A. formosana is the smallest and usually stemless 

 with quite smooth stipes, while A. podophylla is a little larger with stems 

 usually -1 m. long and very muricate stipes. A. latebrosa is the largest, its 

 stems being marked very distinctly with leaf-scars and 2-20 m. tall, its 

 fronds being ovate-oblong 260-400 cm. long 145 cm. broad, and its stipes being 

 15cm. long, nearly smooth or very slightly muricate and covered with 

 numerous white long soft scales at the base, while Oyathea spinulosa is a little 



