7G2 DOM ATI A IN CERTAIN AUSTRALIAN AND OTHER PLANTS, 



In classifying the Cinchonas, Howard states that Pavon divided 

 the 40 species into two groups: 23 species without glands (sin 

 glandulas) and 12 with glands (con glandulas). ("Illustrations 

 of the Nueva Quinologia of Pavon," 1862.) C. villosa, one of the 

 second group is thus described : "Folia . . . glandulis nonnullis 

 rotundatis, subtus concavis, marginibus villosis, supra promi- 

 nentibus, ad nervorum axillas insertis, supra obscure viridia, 

 subtus dilute." . . . "This is a species moderately- 

 hairy all over, especially on the under-side veins." Prom the 

 position of these so-called glands in the nerve-axils, and their 

 appearance in the figures, I have no doubt but that they are 

 domatia. Among the species spoken of as without glands, C. 

 viridifolia is described as "At nerve-axils pilose-tomentose," 

 which is one of the forms of domatia. C. villosa and (J. cun- 

 glomerata are mentioned as hairy. This is contrary to Dr. Lund- 

 strom's experience: his opinion being that domatia do not occur in 

 hairy-leaved plants. 



A doubtful species of CaUsaya known as " naranjada " is 

 spoken of by Howard as having " scrobicules not only at the 

 axils of the veins, but also at their junction with the smaller 

 veins, as in Olea scrohicidata." The accompanying figure shows 

 very distinct domatia, which are visible on both sides of the leaf. 

 (Journal of Botany, 1869, p. 3.) 



Of Cinchona Ledyerinna, Trimen says : " scrobicules not con- 

 spicuous, mostly confined to the upper vein-angles." (Journ. of 

 Botany, 1881, p. 323.) 



Martius in the " Flora of Brazil " refers to these structures in 

 several descriptions of the leaves. 



Hooker says of Ehwcarpus deutatus, " with hollows where the 

 veins meet the midrib." (Handbk. N.Z. Flora, p. 34). 



F. V. Mueller i-emarks of Cupania foveolata : " The principal 

 veins with dimples in their axils." (Fr. Phy. ix. p. 95.) 



Bentham desci'ibes Ne2)heliu7n foveolatum as "having frequently 

 a cup-shaped cavity in the axils of the primary veins." (Fl. 

 Aust. i. p. 466) : Gupania xylocarpa, " with hairy tufts almost 

 always conspicuous in the axils of the raised primary veins." 



