i8 



Plant Invasion on Lava Fhnvs. 



cient quautity to be conspicuous from a distance. A longer search 

 would probably add quite a few more species to the list: 



FILICES.^ 



Asple7iium pracniorsum Sw. {As- 

 pleniiun fnrcatum, Thbg. ) 



Aspleninm ti'ichomanes L., var. 

 {Asplcnuan densum Brack.) 



Diellia ereda (?) Brack. {Lind- 

 say a ere da Hook.) 



Doryopteris decora Brack. {Fieri s 

 decora Hook.) 



Pellaea ternifolia (Cav.) Link. 

 Psi/otnni nudum (ly.) Griesb. 



{Psi/otuni triqtietrjim Sw.) 

 Polypodiuni pelluciduin Klf . var. 



The folded form. 

 Sadleria cyat/ieoides Klf. 



PHANEROGAMS. 



Cyperus sp. 



Amaranthtis spinosus L. 

 Rumex giganteus Ait. 

 Osteomeles an ill yl/idi folia 



(Smith.) Lindl. 

 Meibomia 7i fici?ia ia {Jack.) 



Kuntz. 

 Oxalis corniculata L,. 

 Eupliorbia pilulifera L,. 

 Sida cordifolia ly. 

 Waltheria aniericana ly. 

 Opuntia tuna (L,.) Mill. 

 Metrosideros polyniorpJia Gaud., 



var. 



Asclepias ciwassavica L. 

 Ipomaea congesta R. Br. 

 JLerbejia bonariensis L,. 

 Pledranthns austral is R. Br. 

 Capsicum frutescens L, . 

 Lycopersicum esculentum Mill. 

 Sola7ium nigrum L,. 

 Bidens pilosa L. 

 Erigero?i canadensis L,. 

 (hiaplialium sp. 

 So7ichus oleraceus L. 

 Pailla7'dia sp. 



Of the above, the most frequent species met with are ^Ltrosi- 

 deros polymojpha, Polypodium pellucidum and Sadleria eyatheoides. 

 With the exception of Metrosideros polymorpha, which is the pre- 

 vailing tree, these plants do not give a conspicuous aspect to the 

 flora in the immediate vicinity of the flow, but constitute what 

 might be classified as the weeds. Of the twenty-three phanero- 

 gams, sixteen belong to the naturalized flora and six to the native 

 flora, one of the latter being of wide distribution as a shore plant. 



^ These are the names recognized in Christensen's Index Filicum, but for 

 the convenience of local readers the names given in Hillebrand's Flora are 

 given in parentheses. 



