166 CHRIST. 
43. Asplenium insititium iUack. U. S. Explor. Exped. 101. pi. 22, f. 2. 
Luzon, Province of Benguet, Baoruio (6012 Elmer) Marcli, 1004. 
I have identifiea tliis plant after comparison Avith specimens from Ihc Saiul- 
wich Islands, leg. JliUehnind and Buhhrhi, and from New Caledonia leg. Franc. 
It is the form that CopcJand in his Polypodiaccaa' of the Philippines, 84, supposes 
to be the variety hipimmtifiditm of A. cmitiguum Kaulf., but it belongs evidently 
in the section with .1 . cvneatum. 
SYeNOCHLAENA J. Sm. 
Tlie species of this genus often can not he determined with certainty without 
utilizing the characters shown by. the secondary leaves. Unfortunately these 
secondary leaves are as yet imperfectly known in many species, for frequently 
when adult and soriferous leaves are found, the secondary leaves are not to be 
found, and without the three forms and without the certainty of their having 
come from the same plant it is often diflicult if not impossible to identify these 
forms of Stcnochhwna with trimorphous leaves. 
Underwood^ separates the species of Stenochlaena of the Old World, which 
have the veins springing directly from the midrib, into two groups: I, Terat- 
ophylhnn with trimorphous leaves and with spiny naked rhizomes, and 2, 
Lomariopsis with rliizomes covered with scales but spineless. However, our 
knowledge of the last group is not sufficiently complete to determine whether or 
not the secondary leaves are present or lacking, but I am of the opinion tliat 
they are present, at least in some species. 
From the Philippines I am able to record the following species: 
r 
44. Stenochlaena aculeata (Blume) Kunze Bot. Zeit. 6: 142. Lomaria 
aculeata Blume Enum. PI. Jav. 205. 
Luzon, Province of Rizal {Loher) March, 190G; (2095 Ahcrn's collector) conf. 
Verhandl. Schwciz. Nat. Forsch. Gesellsch. (1906) Tah. 8; Province of Bcnguet 
(G264 Elmer); northern Luzon {Warhurg) . Mindanao, Mount Batangan 
( Warhurg ) . 
The secondary leaves of this plant agree very well with those figured by Tlooher 
Sp. Ei]. 1 : 50. B, for Davallia achilleaefoUa Wall., which is cited by Underwood 
as a synonym of S. aculeata. I do not hesitate to identify with this species the 
form described by Gopeland as Asplenium epiphyticum (Perk. Frag. Fl. Philip. 
(1005) 184), and Dr. Gopeland himself admits in his Comparative Ecology of 
San Pvainon Polypodiacea.'," that thin plant is "apparently identical with occasional 
immature forms of S. aculeata." This form constitutes simply, as I have demon- 
strated in Verhand. Hchwciz. Nat. F(yrsch. Ges. (190G) Tal). 5, the metamorphosis 
of the secondary leaves to the adult ones, combined with asplenioid sori which 
appear on the metamorphosed leaves as a reminder of the origin of the genus, 
which is from the vicinity of Asplenium. I have a specimen from Dr. Gopeland 
which has beside scolopendriform leaves, a portion of the rhizome, with spines 
and with tripinnate leaves similar to those figured by Hooker for Davallia 
achilleaefoUa, 
Gopelaiid found his Asplenium epiphyticum without the adult form of Steno- 
ehlacna, which shows that the species of Stenochlaena are not always normally 
developed, but remain sometimes in a stunted condition. An analagous case is 
found in the Philippines in Leptoehilus hcteroditus. 
^Bull. Torr. Bot. Gluh. 33 (1906) 35. 
'''This Journal, Bot. 2 (1907) 69. 
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