146 
When talking of constituents of latex oi Para rubber one must 
not forget that in tapping a rubber tree one gets a certain proportion 
of tree sap into it as well as the contents of the latex tubes as Mi . 
B amber suggests, and these sugars occurring in drawn latex may be 
derived from the sap. It is quite possible that these little known 
constituents ma/ play an important part in manufactured rubber, 
and they require investigating. Ed. 
CHONEMORPHA RUBBER-VINES. 
The genus Chonemorpha ( Apocynacea ) comprises about a dozen 
very ornamental climbers occurring in India, Cochin-China, and 
Malaya. One of these has been culti vated for many years m the plant 
house in the Botanic Gardens where -^oted in the ground it climbs 
over an arch of rock and is very attractive from its large fragrant 
flowers. A specimen was sent to Colonel Pi am, ot the Royal Gardens, 
Kew, last year, to obtain the na‘"e and place of origin of this plant 
and he wrote in answer: “ Dr. Stapf finds it to be a Chonemorpha and 
the interest of it is that it is *»e species from Ceylon and Southern 
India which goes by the r-«e oi Ch, macrophyl a GDon which is 
really a distinct Sylhet states. As a- matter of fact Stapf finds that 
the C macrophvlla of theF'°™ of British India includes several species. 
This Ceylon-Malabar one, of which you send material, is the one 
figured by Rheede in tl»e Hortus Malabaricus vol 1x^-5 and 6. Denn- V 
stedt put it down in l lis Schluessel, 1818, as Pergularia tomentosa, I 
suppose from Roxburgh’ 5 list < Hort - Ben «- 20) in i8i 4' This ma y 
have « guess bu l ifjA was a guess that anticipated De Candolle 
(Prodromus IV 76). V(IJ, f* 
So far as Stapf can find out 110 distinctive name has ever been 
given to Rheede’s plant. 
Stapf also points out that the Malay Peninsula Chonemorpha in- 
cluded under Ch, mqcrophylla in the Flora of British India is likewise 
distinct and it .will have to'get a new name.” 
Certainly ihe charming but smaller flowered plant of Penang , 
Hill is very different in appearance from the Targe flowered plant we 
cultivate in oitr Gardens. 
The three macrophyllas in the Flora of British India there- 
fore require distinctive names and Col. Prain and Dr. Stapf 
suggest that as Roxburgh gave the name of C. macrophvlla to the 
Sylhet and Assam plant it should retain that name. The South 
Indian and Ceylon plant which we have here should he called C. 
Rheedei and I would suggest C. Penangensis for the one on Penang 
Hill, 
I will no w # describe these species : 
Chonemorpha Rheedei n. sp. 
