198 ciiuisT. 



10. Dryopteris procurrens (Mctt.) O. Kt/c. Rev. ({cii. Pl. 2 (18!)1) 81:5. 

 Aspidium procurrens Mett. Anii. Jjiisd. Bat. 1 : 231. 



LuzoN, Province of Laftuna, ragsanjan (1992 Cupcland) Fchruary, 1903: 

 Province of Rizal, liosohoso (1094 Raitios) July, 1900: Province of Bataan, 

 Mount Mariveles (220, 1389 Copeland) Fehruary, August, 1904. Culion (589 

 Merrill) December, 1902. Mindanao, Province of Zamhoanga (lG93a Copelund) . 



Malaya. 



From repeated examinations of material from tlie Philippines I have not heen 

 ahle to determine with certainty the form descrihed by Hookcr, Synopsis 292, as 

 Nephrodium latipimut; as tliat species is represented by specimens from Hongkong 

 and Tonkin (leg. Cadiere) . 



17. Dryopteris heterocarpa (Blume) 0. Kuntze Rev. Gen. Pl. 2 (1891) 813. 

 Polypodium heterocarjmm Blume Eiuim. (1828) l.^iS. 



LuzoN, Province of Laguna, Mount Maquiling (2027 Copelund) Marcli, 1900. 

 Sunda Islands. 



18. Dryopteris canescens (Blume) C. Chr. Ind. (1905) 256. Polypodium 

 canescens Blume Envim. (1828) 158. Gymnogramm^ cancsccns Blume Fil. Jav. 

 93. t. 40- Aspidiu7ii canescens Christ. Ann. Jard. Bot. Buitenz. 15^: 130. 



The Philippines share with Celebes a plurality of forms of this species, interest- 

 ing because of the numerous more or less "insular" forms into which it is 

 divided. I refer the reader to what I have said regarding it in Ann. Jard. Bot. 

 Buitenzorg 1. c, wliere I have showTi its affinity to the group containing P. 

 parasitica of which it appears to be a weakly derived species, weakly derived 

 because of its generally reduced dimensions, the indusium frequently lacking, 

 and its sori irregular, but above all in the variation in the form of the fronds 

 which present all forms of pinnse from those linear and clongated to those 

 variously cut, lobed and dilated in a most bizarre manner, and finally in the 

 dimorphism and narrowness of the fertile fronds Avhich have niuch elongated 

 stipes and the pinnse so narrowed that the sori lose their distinctness and form 

 a mass which entirely covers the narrow fertile pinnse, in this latter respect 

 resembling those of Egenolfia appendiculata. 



In Celebes I have distinguished three forms — nephrodiformis, which is scarcely 

 dimorphous; gymnogrummoides, with the fertile fronds somewhat reduced; and 

 acrostichoides with the fertile pinnae narrowly linear. For the species as it 

 occurs in the Philippines, this distinction does not suffice, and it is necessary to 

 distinguish a large number of forms, some of wliich have acquired the value of 

 subspecies, or perhaps in some cases, of species. These forms I characterize as 

 follows : 



Var. lobatum n. var. 



Statura minore, stipite longiore (20 cm., frondis 20 cm.) pinnis niinus 

 numerosis, latioribus, lobis latioribus, paucioribus, profundioribus nervis 

 flexuosis, interdum irregularibus, aream unam costalem forinanti])us, 

 pubescentia sensiore grisea imprimis costas nervosque tegente, et soris 

 indusiis carentibus, saepe irregulariter elongatis. 



LuzoN, Province of Rizal, Mabacal (Loher) March, 1906: Province of Ben- 

 guet, Baguio (1866 Cojicland) November, 1905. 



Java, Celebes. 



This variety more or less resembles the large form figured by Blume and 

 approaches a small D. parasitica, but the stipe is relatively longer, 20 cm., the 

 frond 20 cm., the pinnse less numerous, longer, the lobes longer and more numerous 

 and more deeply divided, the nerves very undulating, forming one costal areola, 

 pubescent. 



