204 XOTES AND EXHIBITS. 



Mr. A. A. Hamilton exhibited a series of speeiniens of Aroids from the 

 National Herbarium, illustrating Chromatism, Vireseence and Multiplication of 

 Spathes. (1) Anthurium chelseiensis Hort., Botanic Gardens, Sydney (E. N. 

 Ward, April, 1914). (2) .4. AiKlreaniim Linden, "Uralla," Concord (J. H. 

 Horton, July, 1917). In both examples tlic highly coloured pigfment. which under 

 normal conditions covers the spathe, is only partially developed. On a portion of 

 the surface the chlorophyll is disclosed (vireseence) indicating the leafy origin of 

 the spathe. In the example of A. Andreanum the spadix is suppressed and the 

 spathe slightly malformed. (3) Bichardia africana Kunth., Manly (W. Ellison, 

 August, 1914), showing (o) a coloured leaf (chromatism) on the flower stem simu- 

 lating the spathe, (b) drawing by Miss M. Flockton of a flower grown at Sum- 

 mer Hill by Mrs. W. H. Hughes, depicting a supernumerary spathe enfolding 

 the normal floral envelope. (4) Bichardia Elliottiana >< Pentlandii, Sydney 

 Botanic Gardens (C. Woolnough, January, 1920) from a seedling raised b.\- H. 

 H. B. Bradley. In this example the colouring pigment of the spathe is partially 

 developed in the supporting leaf. Worsdell (Prin. of Plant Teratol., i., PI. xvii.) 

 figures a similar example of chromatism in B. Elliottiana, and it is interesting to 

 note that a seedling of this stock raised in Australia ha-s perpetuated the 

 abnormality. 



Jlr. Fletcher eyhibited a remarkable leaf of Jacaraiida ovalifolia, 12i inches 

 long, apparently bifurcated apically for 3 inches, one branch having 9A, and the 

 other 8i pairs of jjinnae, with 13A pairs of pinnae on the undivided pro.fimal 

 portion; and he raised the (juestion whether it was really a case of division of the 

 gi-owing point; or, seeing that the apparent bifurcations have pairs of pinnae, 

 whether it was a ease of the incomplete fusion of two leaves. He showed also 

 flowering branches of .1. discolor with leaves with one pair, two paii-s, and three 

 pairs of pinnae; leaves of advanced seedlings which had not yet flowered, with 

 ten and eleven pairs of pinnae; and reversion-shoots and seedlings of euphvllo- 

 dineous Acacias, to illustrate the importance of taking account of the terminal 

 setae. 



