172 
CHRIST. 
61. Pteris biaurita Linn. Sp. PI. (1753) 1076. 
Luzon, Province of Benguet, Mount Tonglon (Loher) ; Buguias (1895 Copeland) 
October, 1905; Manila (Usteri) December, 1902. Palawan, (594 Foxworthy) 
April, 1906. 
A subspecies resembling the typical form, but the nerves forming a costal 
areola which is sometimes narrow and difficult to find, sometimes rather large 
and distinct. 
62. Pteris Blumeana Agardli Pterid. 22. 
Stipite rhachique, saepe etiam costis, rufostramineis, castaneis aut 
atratis verrucis minutis asperis, segmentis linearibus basi plus minus 
liberis, numerosis, pectinato-confertis, nervis liberis subtus tenuibus minus 
manifestis, textura coriacea rigida, colore obscure viridi saepe glaucino. 
Mindanao, Lake Lanao, Camp Keitliley (255 Mrs. Clemens) February, 1906: 
District of Davao, Mount Dagatpan (Warburg) • Santa Cruz (254 DeVore & 
Hoover) April, 1903: Province of Zamboanga, San Ramon (1596, 1599 Copeland) 
January, 1905. Luzon, Province of Benguet, Sablan (6213 Elmer) April, 1904. 
A subspecies with coriaceous texture, linear segments slightly or not at all 
united at the base, free veins which are very slender and scarcely visible above, 
its color dark and often somewhat glaucous, the stipe and rachis dark, reddish 
or blackish and somewhat verrucose. It is a Malayan form that I have also 
from Java, Tjibodas, leg. Raciborski, 1897; Perak, leg. Ridley No. 9543; Khasia, 
leg. Austen, det. Clarke “Var. Khasiana,” and Yabim, near Limbang, German New 
Guinea, leg. H. Zahn, 1905. I believe it to be identical with Pteris Blumeana 
Agardh, as described by Hooker 10 and by Raciborski V 
Var. asperula J. Sm. in Hook. Journ. Bot. 3 (1841) 405, et Hook. Sp. Fil. 
3: 181, t. 135 A; var. setigera Hook. 1. c. 
Costis setulis albis 1.5 mm. longis superne regulariter ciliatis. 
Basilan (93 DeVore & Hoover) April, 1903. Mindanao, Province of Zam- 
boanga, San Ramon (1651 Copeland) February, 1905. 
63. Pteris Whitfordi n. subsp. ( P . Whitfordi Copel. in Philip. Journ. Sci. 
1 J1906) Suppl. 255, pro specie). 
A typo differt colore atroviridi, textura coriacea, segmentis angulo 
acuto erecto-patentibus usque ad costam separatis, sinu fere nullo, stipite 
valido, paleis brunneis 0.5 cm. longis lanceolatis basi vestito, planta 
magna 60 ad 70 cm. alta, nervis manifestis. 
Negkos, Gimagan River (1660 Whit ford) . 
64. Pteris parviloba subsp.; Christ in Bull. Sci. Fr. et Belg. 28 (1898) 
264. t. 12. 
Statura gracili, stipite tenui, rufostramineo, scaberulo, fronde late 
deltoideo, pinnis infimis auctis et valde deflexis, segmentis confertis 
lineari-oblongis, brevibus, basi plerumque liberis, nervis tenuibus subtus 
10 Sp. Fil. 3: 180. 
17 Pterid. Buitenzorg 156. 
