C. CALISAYA, VAR. LEDGERIANA, AND C. LEDGERIANA. 327 
quarters. Having mentioned the C. Uritusinga, I will add that 
the improvement in this species by cultivation throws light pro- 
bably upon the large produce of the .Ledgeriana. I show the 
bark of this species (well ascertained by Ruiz and Pavon)asI 
received it from the mountains of Uritusinga, together with bota- 
nieal specimens and seed which I raised, and gave therefrom a 
plant to the Indian Government. From the descendants of this 
small tree Mr. M‘Ivor sent me back the bark which I exhibit, 
from 4 oz. of which I obtained the amount of quinine which I 
exhibit, 5:62 per cent., or, say, 73 per cent. of sulph. quinine. I 
traced the contents of the bark by analysis from step to step, and 
found that though the appearance had not varied, the produce of 
quinine had increased in about fourfold ratio; so that a most 
valuable bark is the result of a somewhat unpromising beginning, 
the Uritusinga bark bearing (as Mr. Cross remarked to me) the 
aspect of having been grown in a dry or poor soil If the Led- 
geriana has improved as much by cultivation, it may well bear 
away the palm. 
Dr. Trimen, in association with Prof. Bentley, has done good 
service to science in descriptions of Cinchone, published in * Medi- 
cinal Plants,’ pt. 30, also in rescuing from oblivion the C. crispa 
of Tafalla. lf the former able botanist will devote his attention 
to the (provisionally named) Cinchona robusta, and will give us a 
clear account both of the origin and probable uses of this valuable 
sort, giving it a clear and definite name, he will confer a lasting 
obligation on the cultivators of Cinchona in the regions of the 
East. 
AnDENDUM.— Whilst these sheets are passing through the 
press, I am fortunate in receiving a visit from Mr. C. Ledger 
himself, on his way to Australia. I find that amongst my plants 
he distinctly recognizes some of those which I exhibited (from 
the Yarrow seed) as the true Zedgeriana. With equal decision he 
fixed on my first or A form, pl. vi.,‘ Quinology of the East-Indian 
Plantations,’ as the real rojo, this term referring to the colour 
of the changing leaves *, which, he says, is exactly represented, as 
well as the rich glossy appearance of the upper surface of the leaves, 
in my plate X. (‘Quinology of the E.-Indian Plantations,’ the 
Calisaya anglica, which was drawn from a living plant and coloured 
under my own inspection) It resembles the change in the leaves 
* Not well given by Mr. Fitch. 
