166 (5IIRIST. 



■i:i. Asplenium insititium Brack. U. S. Explor. lOxiiod. 1(>]. pl. :i:i. f. 2. 



LuzoN, rrovincc of Bc'nfi;uct, Baf^uio ((»012 lUmcr) Marcli, ]!»04. 



I have idcntified tliis ])lant after comparison with spccimcns from the Sand- 

 wich Islands, lcf,'. llUkhnmd and Bnldmn, and from Ncw Calcdonia lcg. Franc. 

 It is the form that Cvpelavd in his Polypodiaceaa; of the Philippincs, 84, supposes 

 to be the variety Upinnatifidum of A. contiguum Kaulf., but it bdongs evidently 

 in the section with A. cuneatum. 



STENOCHLAENA J. Sm. 



Thc spccies of this genus oftcn can not bc dctcrniincd with ccrtainty without 

 utilizing the characters shown by the secondary leaves. Unfortunately these 

 sccondary lcaves are as yct imperfectly known in many specics, for frequently 

 when adult and sorifcrous lcaves arc found, thc secondary lcaves arc not to be 

 found, and without the threc forms and without tlie ccrtainty of their liaving 

 come from the same plant it is often difficult if not impossible to idcntify these 

 forms of Stenochlacna with trimorphous leavcs. 



Undertvood''' separatcs thc species of Strnoclilacua of the Old World, wliicli 

 have the veins springing directly from the midrib, into two groups: 1, Tcrat- 

 ophylhim with trimorphous leaves and with spiny naked rhizomes, and 2, 

 Lomariopsis with rhizomes covered with scales but spineless. Howevcr, our 

 knowlcdge of the last group is not sufficiently completc to dctermine whether or 

 not the secondary leaves are prcscnt or lacking, but 1 am of the opinion that 

 they are present, at least in some species. 



From the Philippines I am able to rccord the follov^^ing species: 



44. Stenoclilaena aculeata (Blume) Kunze Bot. Zeit. 6: 142. Loinaria 

 aculcata Blume Enum. PI. Jav. 205. 



LuzoN, Provincc of Rizal (Lohcr) March, lOOG; (2G9ri Ahcrn^s collcctor) conf. 

 Vcrhandl. Schwcis. Nat. Forsch. Gcsellsch. (1006) Tah. 8; Provincc of Benguet 

 (6264 Elmer) ; northern Luzon (Warburg). Mindanao, Mount Batangan 

 ( Warhurg ) . 



The secondary leavcs of tliis plant agree very avcII with those figured by Hookcr 

 Sp. Fil. 1 : 56. B, for Davallia achillcuefolia Wall., \\hich is cited by Undericood 

 as a synonym of *S'. aculcata. I do not hesitate to identify with this species the 

 form described by Gopcland as Asplenium epiphyticum (Perk. Frag. FI. Philip. 

 (1905) 184), and Dr. Copeland himsclf adniits in his Coniparative Ecology of 

 San Ramon Polypodiacca^"' that this plant is "apparently idcntical with occasional 

 immature forms of »S'. aculcata." This form constitutes simply, as I have denion- 

 strated in Verhand. Schweis. Nat. Forsch. Ges. (190G) Tuh. 5, the nictamorphosis 

 of the secondary leaves to thc adult ones, combined witli asplcnioid sori which 

 ajipear on the metaniorphosed Icaves as a reminder of the origin of the genus, 

 which is from the vicinity of Asplenium. I'have a specimen from Dr. Copclund 

 which has beside scolopcndriform leavcs, a portion of the rhizonie with spines 

 and with tripinnate leaves similar to those figured by Hooker for DuvuUia 

 achiUeacfoJia. 



Copeland found his Asplenium cpiphyticum without the adult form of Steno- 

 chlacna, which shows that the species of Stcnochlaena are not always normally 

 develoiied, but remain sometimcs in a stunted condition. An analagous case is 

 found in the Philippincs in Lcploohilus hctcroclitus. 



" Ihill. Torr. Bot. Cluh. 33 (190G) 35. 

 '"This Journal, Bot. 2 (1907) 69. 



