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198 CHRIST. . " 
16. Dryopteris procurrens (Mctt.) O. Ktze. Rev. Gen. PI. 2 (1891) 813. 
Aspidium procurrtms Mett. Ann. Lugd. Bat. 1 : 231. 
Luzon, Province of Laguna, Pagaanjan ( 1992 Copcland] February, 1903: 
Province of Rizal, Bosoboao (1094 Ramos) July, 1906: Province of Bataan, 
Mount Mariveles (226, 1389 Copeland) February, August; 1904. Culion (589 
Merrill) December, 1902. Mindanao, Province of Zamboanga (1693a Copcland). 
Malaya. 
From repeated examinations of material from the Philippines I have not been 
able to determine with certainty the form described by Hooker, Synopsis 292, as 
NepJirodium latipinna, as that species is represented by specimens from TTongkong 
and Tonkin (leg. Cadiere) . 
17. Dryopteris heterocarpa (Blume) 0. Kuntze Rev. Gen. PI. 2 (1891) .313. 
Polypodium heterocarpum Blume Enum. (1828) 155. 
Luzon- Province of T^aguna, Mount Maquiling (2027 Copeland) March, 1906. 
Siuida Islands, 
18. Dryopteris canescens (Blume) C. Chr. Ind. (1905) 256. Polypodium 
cmiescens Blume Enum. (1828) 158. Gyninogramme ca/nescens Blume Fil. Jav. 
93. t. 40' Aspidium 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 liave said regarding it in Ann. Jard. Bot. i 
Buitenzorg 1. c, where I have shovni 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 freq^uently lacking, 
and its sori irregular, but above all in the variation in the form of tlxc fronds * 
which present all forms of pinnai from those linear and elongated to those 
variously cut, lobed and dilated in a most bizarre manner, and finally in the 
dimorphism and narrowness of the fertile fronds which have uiueh elongated 
stipes and the pinnse so narrowed that the sori lose their distinctness and form 
a mass which entirely covers the narrow fertile pinnae, in this latter respect il 
resembling those of Egenolfia appe^idioulata. 
In Celebes I have distinguished three forms — nephrodiformis, which is scarcely 
dimorphous; gymnogrammoides, with the fertile fronds somewhat reduced; and 
r 
uvrostichoidcs with the fertile pinnai narrowly linear. For the sjiecies as it 
occurs in the Philippines, this distinction does not suffice, and it is necessary to 
distinguish a large number of forms, some of which have acquired the value of 
subspecies, or perhaps in some cases, of species. These forms I characterize as 
follows: 
Var. lobatum n. var. 
Staturu iiiinorCj stipite longiore (20 cm., frondi.s 20 cm.) pinnis minus 
Utimerosis, latioribus, lobis latioribus^ paiicioribus, profiindioriburi nervis 
flexuosis, interdum irregularibus, areaiii nnam costalem forinantibuSj 
pubescentia sensiore grisea imprimis costas nei^vosqiio tegente, et soris 
indusiis carentibus, saepe irregulariter clongatis. 
Luzon, Province of Rizal, Mabacal [Loher] March, 1906: Province of Ben- 
guet, Baguio (1866 Copcland) November, 1905. 
Jaya, Celebes. 
This variety more or less resembles the large form fipnned 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 niore numerous 
and more deeply divided, the nerves very undulating, forming one costal areola, 
pubescent. 
m.. 
