102 NOTES AND EXHIBITS. 



alone is well worth extensively planting for shade about home- 

 steads in the warmer parts of Australia — (2) Loranthus longi- 

 florus Desr. This parasitic plant was growing on a lemon-tree 

 at Lindfield, and was forwarded by Mr. Warwick Lloyd to the 

 exhibitor for identification and report. Mr. Turner had not 

 hitherto known this species of Loranthus to grow on any exotic 

 tree or plant. In Mr. Fred Turner's paper " On Exotic Trees 

 and Shrubs affected by Australian Loranths and Viscums " 

 (the Society's Proceedings, 1895), only three species of the in- 

 digenous Loranthacece were recorded as growing on exotic vegeta- 

 tion, viz., L. celastroides Sieb., L pendulus Sieb., and Viscum 

 articulatum Burm., the first two being much more common than 

 the last. — (3) Polygonum orientale Linn., var. pilosu77i Meissn., 

 Syn. P. pilosum Roxb. The specimen was forwarded by Mr. K. 

 M. 'N'iall, Buckunguy Station, Nyngan district, to the exhibitor 

 for its botanical name. Mr. Turner has never hitherto known 

 this species to occur west of the Blue Mountains, N.S.W. Mr. 

 Niall says that " it grows four or five feet high, and that certain 

 horses eat it greedily, whilst others will not look at it." This 

 species is recorded in Turner's " Botanical Survey of North-East 

 New South Wales." 



Mr. T. Whitelegge exhibited a series of mounted slides illus- 

 trating the sexual generation of Psilotum triquetr^im. The spores 

 were grown on the living rhizomes of Davallia pyxidata, in a 

 small Wardian case. The spores of Psilotum, although isosporous, 

 are strictly dioecious. The male gametophyte consists of about 

 eight cells. These are unequal in size, with clear, thin walls, 

 enclosing very many extremely minute antherozooids. The cells 

 are distinct, being only slightly adherent to each other, easily 

 detached, and often float free when placed in water. The larger 

 cells are equal to the diameter of the spore, the smaller to that 

 of the nucleus. Spores destined to produce the female gameto- 

 phyte contain an indefinite number of small cells. A single 

 dome-shaped body emerges from the centre of the spore, and is 

 about equal to its diameter. The structure consists of many 

 irregular cells, apparently held together by gum; some project on 



