104 KEW GARDEN MUSEUM. 
in the preparation of the officinal syrup; and as a test for acids and 
alkalies. 
Ord. Mortncace®. HorseRADISH-TREE FAMILY. 
This Natural Order, of doubtful position, is now generally placed 
near the Violet Family; but it requires a botanical eye to distinguish 
the affinities. It is confined to one genus, Moringa. 
Ben-oil, pods and seeds of Moringa pterygosperma, Gert. (M. oleifera, 
Lam.) An Indian tree, but cultivated in Jamaica, whence our sample 
of the oil was sent by the late Dr. M‘Fadyen. It is a pure fixed oil, 
much used by perfumers on account of its not easily becoming rancid, 
and by watchmakers for oiling the machinery of clocks and watches, 
because it does not freeze. The roots have so exactly the flavour of 
Horseradish, that they are a common substitute for it among Europeans, 
both in the East and West Indies. Pods used in curries, on account 
of their peculiar flavour. 
Mocheris Gum; so called in Scinde. (Dr. Stocks.) Exudes from 
wounds made in the bark of Moringa pterygosperma, Gærtn., agreeing 
in some of its properties with Gum Tragacanth. 
Wood of Moringa pterygosperma, Gertn. Scinde. (Dr. Stocks). 
Ghalee. The seeds, so called, of Moringa aptera, Gertn. Scinde. 
(Dr. Stocks.) This species, if it be really distinct, is considered by De 
Candolle to yield the Ben-oil, to judge from his expression, ** Beenalbum 
offie."— Probably a similar oil is afforded by both species. 
Ord. DnRosERACEX. SUuN-DEW FAMILY. 
. The well known Sun-dews, or species of Drosera, give the name to 
this Family: they are not, that I am aware of, employed economically ; 
but I may here observe that nearly all the species in the Herbarium 
stain the paper, especially by their roots, with a fine purple colour re- 
sembling cochineal, and that Mr. Drummond has been so struck with 
this in the large-rooted Swan River kinds, that he has endeavoured to 
direct publie attention to the fact, feeling assured they would yield a 
valuable dye. 
American Fly-trap. Dionæa Muscipula, L. South States of North 
. America. A botanical curiosity, of which living plants may generally 
_ be seen in the stoves during summer. 
drawing of it. The Droseras are remarkable for their fly-catching 
= mange ws i — 
The Museum contains a large © 
