CINCHONA LEDGERIANA A HYBRID. 5 
Group 2. Bit fa tinit Fugacious species, with decumbent con- 
tinuous main stems. 
Asiatic shes thas . Sp. 257-270 
American ‘ . Sp. 271-278 
Group 8. Cech ot y@. Persistent species with continuous 
asce te 
‘Meats j P . Sp. 274-275 
African ; : . Sp. 276-277 
Group 4. Suberose. Fugacious species, with continuous ascend- 
Asiatic and Polynesian . Sp. 278-296 
African : ‘ . Sp. 297-303 
American . ; ‘ Sp. 304-312 
(To be continued.) 
CINCHONA LEDGERIANA A HYBRID. 
By Orro Kunrze, Pa.D. 
Dr. y Trimen published in this Journal for 1881 (pp. 
921-385) a p a ones entitled ‘‘ Cinchona Ledgeriana, a distinct species,” 
wherein 7 maintains that C. Ledgeriana is not a variety of C. 
Calis. s Mr. J. EK. Howard had supp e cites the 
following wis in support of ee position atl), the leaves of C. 
Ledgeriana have always the ier gt t part at or about the middle, 
(2) the flowers approach those of C. micrantha in their drooping 
habit, small size, short inflated tube, white colour, and also (3) by 
their buds, which are not at all or very sligh tly widened at the 
end, and never abruptly enlarged there, as they are in C. Calisaya. 
This last character is new to me 
C. Calisaya and C. micrantha are the only species mentioned as 
nearly allied to C. Ledgeriana. I have described indeed C. Ledgeriana 
as a hybrid of these two species in my monograph of Cinchona,* 
wherein I acknowledge — four species: — Wreddelliana = C. 
Calisaya pro — C. Pavoniana = = C. micrantha p.p.; C. Howardi- 
ana = C. succirubra Le p- am € Pahudiana How. All stom 
Cinchonas I regard as synonyms ybrids of those four speci 
The ybeidination of Ganson fos oe proved (1) by some direct 
artificial production of several hybrids, (2) by the fact that the 
seeds of marked trees produced plants with the mixed characters 
of another species. There cannot be any doubt as to the copious 
hybridization of Cinchonas; and it is well known that the hybrids 
. . Cinchona plantations Debi plenty of good fertile seeds; 
C. Ledgeriana shows an exception, and its more or less great 
sey has been often canal 
‘ Cinchona. sine Hees und Cultur der Chininbiume.’ Leipzig, 
one Verlag von Hae 
