[Plate 28.] 



THE OVAL AND THE PALLID HOYAS. 



(HOY A OYALIFOLIA AXD PALLIDA.) 



Stove Climbers from Tropical India, belonging to the Natural Order of Asclepiads. 



J?perifu Characters. 



I. THE OVAL HOYA. — Leaves fleshy, narrow, oval, 3-nerved, rolled back at the edge. Peduncle rather shorter 

 than the leaf, and smooth. Corolla fleshy, with ovate acute segments. Coronet-lobes acute, revolute at edge. 



Left-hand figure. . 



II. THE PALLID HOYA.— Leaves fleshy, ovate, feather-veined, turned back at the edge. Peduncle rather shorter 

 than the leaf. Corolla fleshy, smooth, with ovate acute segments. Coronet-lobes acute, revolute at edge. Bight- 



OR the knowledge of the first of these species we- are indebted to the Chatsworth 



JL 1 collection, from among Mr. Gibson's Indian collection. Along with it is repre- 

 sented on the right hand the Pallid Hoya, which blossomed at Chatsworth at the same 

 time. A comparison of the two figures will show their differences better than mere 

 description. 



The Pallid Hoya was originally observed at Syon, whence, in 1825, materials were 

 supplied for a figure in the Botanical Register. Its origin was then unknown; but the 

 Chatsworth plant now proves it to be a native of India, and we possess specimens from 

 the Burmese Empire collected by the late Mr. Griffith. It is distinguished from the 

 Fleshy Hoya (H. caniosa) not only by a yellowish tint which replaces the dark heavy 

 green of that species, and by its sweeter smell, but also by the form of its leaves, which 

 are acute and exactly ovate; that is to say, similar in figure to an egg divided longi- 

 tudinally, while in the Fleshy Hoya they are as nearly as possible truly elliptical. The 

 umbels of flowers also are smaller. In the Botanical Register the artist has made the stalk 

 of the umbel appear far too short in an unsuccessful attempt at foreshortening. 



Hoya ovalifolia : Wight and Arnott, Contributions to the Flora of India, p. 37 (?)• 



Hoya pallida : Lindley in Botanical Register, t. 951. 



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