MR. W. WOOLLS ON INTRODUCED PLANTS NEAR SYDNEY. 35 



flat depressed disks appear surrounded with it in an irregular 

 crenulate manner. The verrucro of the under surface are oblong 

 in form, particularly towards the margins of the thallus, and are 

 more or less apically flattened, frequently expanding towards the 

 umbilicus into irregular flattened areolae, with more or less of a 

 furfuraceous appearance. 



Plate IV, Fig.l7, ?Z^at7(?-t?iVe5cew5,nat. size, in profile; fig. 18, under surface 

 of thallus, nat. size, showing umbilicus ; fig. 19, thallus seen from above, nat. 

 size 5 fig. 20, portion of the under surface, magn. ; ^g, 21, vorrueae of under 

 surface, magn. ; fig. 22, apothccia, magn. ; fig. 23, vertical section of thallus 

 and apotheciaj fig. 24, enlarged section of thallus ; fig. 25, ascus, spores, 

 and paraphyses; fig. 26, spores, magn. 600; fig. 27, arthrosterigmata 

 and spermatia attached, magn. ; fig. 28, spermatia detached, magn. 



Notes on Introduced Planter occurring in the Neighbourhood 

 of Sydney. By W. Woolls, F.L.S. In a letter to the Pre- 



sident. 



[Eead December 20, 1866.] 



Mt dear Sib, — Thinking that it may not be uninteresting to 

 you to have a list of the plants introduced accidentally into this 

 neighbourhood, I feel a pleasure in forwarding one. If I had 

 enjoyed the opportunity of visiting other parts of this vast con- 

 tinent, I dare say that I should be able to furnish a much larger 

 list ; but occupied as I am in duties which keep me very much at 

 home, my observations have not extended beyond fifty or sixty 

 miles from Parramatta. 



THALAMIFLOBi*: 



(Papaveracea?). 



Argemone 3fexicana, 



(Cruciferse). 



Cajpsella hnrsa-pastoris, 

 Senehiera didyma, 

 Sisymhrium officinale, 



Sinapis arvensis, 



Saphanns sativus. 



d2 



