77S DOMATIA IN CEUTAIN AUSTRALIAN AND OTHER PLANTS, 



El.^ocarpus GRANDIS, F.V.M. 



E. cyaneus, Ait. 



El^ocarpus longifolius, C. Moore 



' Tlie domatia of these 

 three species resemble those 

 already described under 

 Dysoxyhnn and Cechela, but 

 E. grandis has very long 

 slender hairs, and E. cya- 

 jieus has none. 



HoDGKiNSONiA OVATIFLORA, F.V.M. — Herbarium specimens of 

 this plant showed very distinct bunches of hairs in the axils, 

 especially one taken from a cultivated plant in the Sydney 

 Botanical Gardens. But on examining fresh leaves (young) from 

 the same plant, no hairs could be seen with a hand lens. I cut 

 some sections of the axils, however, and found that a very small 

 hairy depression did exist, and examination of numbers of sections 

 revealed a slight extension of tissue from vein to midrib. I have 

 no doubt, therefore, that mature leaves of the plant would show 

 that it should be placed in Group ii. The hairs are few in number, 

 straight and septate. 



ViTis Baudiniana, F.V.M. — I have placed this form in Group ii. 

 because though ordinarily it presents a marked difference in the 

 shape of the triangular pouch, yet it is a modification of that 

 shape, and in addition, all stages may be found from the triangular 

 form almost to the sunken cavity with a circular orifice. They 

 occur in the axils of the lateral veins and midrib, but are frequently 

 present in the secondary vein-axils also, two or three on one 

 vein. At the base of the leaf there are on each side of the 

 midrib, first a small, and next a large lateral springing from the 

 insertion of the petiole, and here are found four large domatia. 

 In the whole leaf they vary from 8 to 30, or probably many mure. 

 I have never found them entirely absent in any leaf. The leaf is 

 hairy, more especially on the under side and in the younger stages. 

 It is easily wetted on both sides, but the water runs into greasy 

 patches on the upper surface. The domatia ai'e formed by the 

 extension of tissue from the midrib and vein, but in the middle the - 

 extension grows out into a point, which arches over the mouth 

 (fig. 7). In the centre, too, there is a dome formed by the 



