Cladrastis and Maackia. 
BY 
H: pTAKEDA? DEC. 
With Plates XXVI-XXVII. 
THESE two small genera of Leguminosae belong to the tribe 
Sophoreae and are more or less related to each other, so that 
Maackia has even been united with the other genus by some 
authors.t There are, sisal several good reasons for regarding 
them as distinct gener. 
The genus Cladvastis was established by Rafinesque in 1825 
on the N. American plant which had formerly been known as 
Virgilia lutea, Michx. f. A second species was added to the genus 
in 1893 from China called C. stmensis, Hemsley, and a third, 
C. shikokiana, Makino®, from Japan. In 1872 Maximowicz 
published a new subgenus of Sophora under the name of Platyos- 
prion, which the author raised to the generic rank soon afterwards-4 
In tg0r Makino transferred with right, though giving no reason, 
Platyosprion into the genus Cladrastis. Thus there have been 
known four species of this genus from Japan, China, and N. 
America. In the present paper I regard Platyosprion as a 
subgenus of Cladrastis ; the reason will be discussed later. 
While Cladrastis is an Asiatico-American genus, Maackia is an 
exclusively Asiatic one, being distributed over Japan, Korea, 
China, and Amurland. The genus was instituted in 1856 by 
Ruprecht and Maximowicz in compliment to Richard Maack, 
who was then teacher of natural history at the gymnasium 
of Irkutzk, and who visited Amurland in 1855 on commission of 
the Siberian Section of the Imperial Geographical Society in 
St. Petersburg. Bentham, while compiling the Genera Plantarum, 
reduced this genus to Cladrastis, apparently without examining 
1 Bentham, in Benth. et Hook, Gen. PIl.i, pt. ii, p. 554, and followed by many 
others. 
2 Hemsl., in Journ. Linn. Soc., Bot., xxix, p. 304. 
3 First named as Sophora shikokiana, Makino, in Tékyé Bot. Mag. (1892), 
53, and described in the same publication (1900), p . 56, and afterwards trans- 
ferred to the present genus by the same author in ree same periodical (1901), 
8 
: 4 Sophora platycarpa, Maxim., in Bull. Acad. Imp. Se. St. Petersb., xviii, 
p. 393, and afterwards as Platyosprion platycarpum, Maxim., ibid., xxii, p. 262. 
[Notes, R.B.G., Edin., No. XXXVII, Nov. 1913.] 
