104 



In the transactions for 1893 I drew attention to the arti- 

 ficial basis upon which the species Thelymitra longifolia, 

 Forbt., and T. aristata, Lind., besides numerous other now 

 suppressed species, were maintained to be distinct from T. 

 ixioides, Sw., I endeavoured to point out by means of dissec- 

 tions taken from numerous plants the totally unreliable 

 details upon which those species were founded. I have since 

 obtained specimens from Clarke Island, Bass Straits, and 

 near Strahan, in which the upper hooded portion of the 

 column wing is exceptionally well developed, and the lateral 

 lobes are entirely suppressed, This necessitates the raising 

 of this variety into specific rank, or reducing the forms T. 

 atistata and" T. longifolia to inconstant varieties of T. 

 ixioides, Sw. 



Amongst introduced plants the following deserve atten- 

 tion : — 



Trichonema roseum, Ker. A. pretty little lily-like iris, 

 with pinkish mauve flowers, steadily disseminating itself in 

 pastures. It is often passed by as a pink form of the harm- 

 less little white lily of spring, but I am assured by von 

 Mueller that it is poisonous, and should be eradicated. 



Euphorbia larthyris, L , the caper-spurge, probably re- 

 sponsible for some of the cattle poisoning that has taken 

 place lately. It is naturalised in many parts. Its powerful 

 cathartic qualities are dangerous. 



Nepeta cataria, L., catmint, is found in some parts. 



Gilia pungens, Hook., of South America, a prickly little 

 herb of certainly no useful qualities, has made its appearance 

 in the central districts. 



Helminthia echioides, Gaert., a useless thistle and Ononis 

 arveim's. L. restbarrow, whose habit is well expressed by its 

 name, are also with us. 



Hatricaria discoidea, D.C., a composite with conical 

 inconspicuous flower-heads, is becoming very common about 

 the suburbs of Hobart. It has medicinal properties like its 

 allies. 



Erigeron linifolius, D.C., is also a common composite but 

 harmless weed very common about Hobart. 



Lepdium draba, L., is common at Cornelian Bay and Sandy 

 Bay. 



Linum catharticum, L., is establishing itself in one or two- 

 places. 



