1 8 Plant Invasion on Lava Mows. 



cieut quantity to be conspicuous from a distance. A longer search 

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



FIUCES.3 



Asplenium praemorsum Svv . {As- Pellaea ternifolia (Cav.) Link. 



plenium furcatum, Thbg.) Psilotum nudum (L.) Griesb. 



Asplenium trichomanes L-., var. {Psilotuni triquetrum Svv.) 



{Asplenium densum Brack.) Polypodium pellucidum Klf. var. 



Diellia erecta (?) Brack. {Lind- The folded form. 



saya erecta Hook.) Sadlcria cyatheoides Klf. 

 Do ryop ten's decora Brack. {Pferis 



decora Hook.) 



PHANEROGAMS. 



Cyperus sp. Asclcpias curassavica L. 



Amaranthus spinosus L. Ipomaea congesta R. Br. 



Rumex giganteus Ait. Verbena bonarieusis L. 

 Osteomeles an thy I lidifolia Plectranthus australis R. Br. 



(Smith.) Lindl. Capsicum frutescens L. 



Meibomia uncinata (Jack.) Lycopersicuni esculentum Mill. 



Kuntz. Solatium nigrum L,. 



Oxalis corniculata L. Bidens pilosa L,. 



Euphorbia pilulifera L,. Erigeron canadensis L,. 



.SV^a cordifolia L. Gnaphalium sp. 



Waltheria amcricana L,. Sonchus oleraceus L,. 



Opuntia tuna (L,.) Mill. Raillardia sp. 

 Metrosideros polymorpha Gaud., 



var. 



Of the above, the most frequent species met with are Metrosi- 

 deros polymorpha, Polypodium pellucidutn and Sadlcria cyatheoides. 

 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. 



3 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. 



