8 - CINCHONA LEDGERIANA A HYBRID. 
Tf we consider that (1) C. Ledgeriana after its doubtless origin 
as a high shrub in the Calisaya-field of Mungpo must be a hybrid, 
(2) C. Ledgeriana is a very rare plant of the ecm Cinchona 
region, (8) C. Ledgeriana shows only small fertility with its own 
pollen, (4) C. Ledgeriana ni the best character of hybrids in 
preferring strange pollen its own, as its typical degeneration 
proves, (5) C. Ledgeriana nhiwe only the specific qualities of 
Calisaya and = micrantha—we must conclude that C. Ledgeriana 
is oad a variet of Cc. ae cs nor a distinct species, but a 
hybrid of C. Calisa ya with C.1 ntha. 
gave two theses on “the quantity of quinine in the bark 
relating to the hybridity :- 
(1) Only for the regular hybrids: the quantity of quinine 
increases by y aye idity. For instance, the bark containing quinine 
averages : 
1. C. Howardiana (succirubra, p. aia ct = per cent. 
nu, C. oe ana Howard, 0°15 per 
im. C. Pavoniana (micrantha p.p.), 0° ‘01 ca cent. 
wed. Weddelliana (Calisaya p. p.), 0°84 per cent. 
I.X mr. (C. pubescens Vahl, cordifolia Mutis, purpurea R.& P., 
caloptera Miq.), 0°72 per cent. 
‘. no m. (C. heterophylla Pavon), no ag existing. 
tv. (C. lancifolia Mutis.), 1°20 p 
Il. cee (C. ovata We , no snalysis seintin ng. 
mx tv. -(C. Huviboldtiana Lambert, C. Hasskarliana Miq.), 
0:70 per cent. 
m. X Iv. (C. officinalis Hooker), 2°58 per cent. 
(2). Only for irregular hybrids (till now only C. Ledgeriana) : 
with the greater irregularity (i.e. the more the several marks of 
to the botanical Desired of the many forms of C. ian in 
Mungpo, and ¢ med by the sian of their bar 
On the or iin 
mu 
pellet of a Sewhy sprung hybrid fertilized the ovary of a species. 
As the regular Cinchona-hybrids of older origin seem to act like 
styled flowers acts like a hybridization and therefore the effects of 
hybridization must be increased. This i ge a scientifie hypo- 
i 8 
f exec 8 t 
inserted in the corolla tube it is only meee ary ~ put away, before 
the corolla is opened (or the pollen is not yet developed), the 
*‘ Pharmazeutische Zeitung’ (Bunzlau), 1879, No. 93; Beilage No, 24. 
