* New Species of Boronia. 



By J. H. Maiden, F.L.S., and J. M. Black. 



[Read August 2, 1910.] 

 Plate I. (upper half). 



Boronia palustris, sp. nov. 



Suffrutex humilis glaber 10-25 cm. altus, circum paludes cres- 

 cens, ramis erectis dichotomis, foliis lanceolatis integris 

 1-nerviis planis 8-15 mm. longis, floribus solitariis vel 

 geminatis terminalibus et axillaribus, pedunculis brevi- 

 bus obconicis, bracteis lanceolatis pedunculo longioribus, 

 sepalis ovato-lanceolatis 3-nerviis rubescentibus intus 

 puberulis reduplicato-valvatis 5 mm. longis, petalis obo- 

 vatis albis imbricatis calyce brevioribus, staminibus 4, 

 filamentis ciliatis apice glandulosis, ovulis collateralibus. 



Found in flower by H. H. D. Griffith on the edge of 

 swamps near Cape Borda and Starvation Creek, Kangaroo 

 Island, October, 1908. 



This is a very distinct species, standing nearly midway 

 between Boronia and Zieria. It has the thick, entire disk of 

 the former genus, but only the 4 stamens of the latter. It 

 has been decided to place it in Boronia, on account of the 

 undivided disk, the collateral ovules, and the filaments ciliate 

 for three-fourths of their length, and glandular at the apex. 

 The two firstnamed characters are never found in Zieria, and 

 ciliate filaments are rare in that genus. In habit the new 

 species closely resembles B. parviflora, Sm., but is dis- 

 tinguished from that and all other Boronias by the 4 stamens, 

 and from most of them by the sepals being longer than the 

 petals. 



EXPLANATION OF PLATE I. (upper half). 

 Boronia palustris, sp. nov. Plant with flowers and carpel. 



