44 THE VICTORIAN NATURALIST. 



This variety differs from A. serrulata in the broader leaves 

 with more numerous veins, in the larger flowers, and in the 

 swollen, oblique corolla. 



BoRONiA TETRANDRA, Labill., var. BicoLOR, Turcz. 



Specimens forwarded by A. Holt from a locality 50 miles north 

 of Swan River, Western Australia, with pale yellow flowers, were 

 considered by Mr. Luehmann to form a new species, B. hoUii, 

 with the following characteristics : — 



A shrub with white spreading hairs on the branches and 

 pinnate leaves. The leaflets mostly 5 to 7, more or less hairy, 5 

 to 8 mm. long, linear, obtuse, the margms recurved. Flowers 

 axillary, solitary, shortly pedunculate or almost sessile. Bracts 

 small. Calyx lobes broadly ovate, acute, purplish, i to 2 mm. 

 long. Petals imbricate ovate, about 6 mm. long, glabrous, pale 

 yellow, with a greenish base. Stamens all on short, thick, 

 glabrous filaments, those opposite the sepals sterile, the four 

 opposite the petals bearing small ovate anthers, without any 

 appendices. Ovary puberulent, stigma fleshy. 



The staminody of the outer stamens could not be satisfactorily 

 verified on the dried specimens in the Herbarium, but fresh 

 material may be obtained at a later date. Since, however, the 

 same collector has found forms with dark reddish-brown petals 

 growing in the same locality, and with all the characteristics 

 associated with Boronia tetrandra, Lab., it seems certain that 

 the original specimen was B. tetrandra^ Lab., var. bicolor, Turcz. 

 Hooker's B. tetrandrais B. pinnata, Sm., and B. tetrandra, Lindl., 

 is B. pulchella, Turcz. 



NOTES ON THE RUSTS OF AUSTRALIA. 

 By D. M'Alpine, Government Vegetable Pathologist. 



{Read before the Field Naturalists^ Club of Victoria, 9th Ajpril, 1906.) 

 Having just completed a work for the Victorian Department of 

 Agriculture on the rusts of Australia, it seems to me a fitting 

 opportunity to call attention to some of the leading features of 

 that important group of fungi as they occur with us, and at the 

 same time incidentally to show how members of this Club might 

 fill up gaps and extend our knowledge of a highly important 

 branch of botany. 



It will explain the nature and scope of the above work when I 

 state that it was the study of a particular member of this family, 

 the rust in wheat, which led to the wider outlook over the entire 

 range of rusts in Australia. It is well known to most of you that 

 m certain seasons the wheat harvest of Australia is largely 

 reduced, and the monetary loss considerable, owing to the 

 ravages of rust. And this not only applies to our own continent. 



