44 Underwood : The genus Stenochlaena 



Pinnae broadly elliptic, 3-3.5 cm. wide, abruptly narrowed to an acuminate 



12. S. guineensis. 



apex 



Pinnae lanceolate, scarcely over 2 cm. wide, tapering to an acuminate apex. 

 Pinnae of the sporophyls short-stalked, 2 mm. or less wide. 



19. S. Pervillei. 

 Pinnae of the sporophyls long-stalked, 4-6 mm. wide. 



Species inquirendae 



23. S. variabilis. 



1. Specimens from Namuli, Makua country, East Tropical Af- 

 rica, collected by Last (Herb. Kew.) have only sterile leaves, 9-10- 

 jugate, but these do not agree with those of any known species. 

 More information is necessary before locating a ninth species from 

 Africa. 



2. Poly podium (?) binerve Hook. Sp. Fil. 4: 176. pL 273 B. 

 1862, is placed by Mr. Baker as "one of the abnormal conditions 

 of Acrosticlium sorbifoliiim" (Syn. Fil. 323). It may represent a 

 good species when its sporophyls become known. It has of 

 course no relation to Polypodium other than that it is a fern, and 

 none to Stenochlaena sorbifolia, but is either a distinct species or 

 less likely a juvenile state of some one already known. 



2. The species of the East Indian and 

 Australian regions and of the Pacific islands 



Of 



scribed in Fee's original monograph in 1844, two were described 

 by Carruthers in Flora Vitiensis and appear entirely to have 

 escaped the notice of the Kew botanists, and one each was added 

 by Presl, Brackenridge, and Mettenius. Most of the species are 

 very clearly marked and not one of them approaches S. sorbifolia, 

 with which all of them have been confused. The following syn- 

 opsis will differentiate the species : 



Pinnae narrow, 1. 5 cm. or less wide. 



Pinnae serrulate ; veins stopping short of the margin ; pinnae of the sporophyls 



1.5-2 mm. wide. 



13. S. Huge Hi. 



Pinnae entire or barely repand ; veins running into a cartilaginous margin ; pinnae 

 of the sporophyls 4-5 mm. wide. 14. S. leptocarpa* 



Pinnae wider, 2-5 cm. 



Pinnae of the sporophyls 2 mm. or less wide. 8. S. Brackenridgei. 



Pinnae of the sporophyls wider, 4-8 mm. wide. 



Pinnae of the sporophyls 8-15 cm. long, short-stalked. 



Foliar pinnae 2 cm. wide, tapering at the apex. 



17. S. Novae- Caledoniae- 



