. 20° 
about Hongkong and Canton, in Anam, Cochin China and Siam, 
irri to Java, Singapore, Penang, Birma, thence to India, 
e he explo ered about Calcutta, going north into Sikkim, 
hee to Bengal and Bombay ; the early part of the year 1876 
he spent in Arabia and Egypt. 
He visited eastern Asia and Russia in the year 1886, and the 
ae Islands in 1887-1888. 
cember, 1891, he proceeded to South America, reaching 
roe in December and remaining in Uruguay, and in the 
Argentine Republic through part of January, 1892. He crossed 
the Andes into Chili, collecting at several localities, including the 
Desert of Atacama, proceeded to Bolivia, where he visited regions 
botanically very little known, and remained in that country 
through the summer, reaching Paraguay in September and pro- 
ceeding to Brazil at the end of the year, reaching Pernambuco 
December 27, 1892. 
In January, 1894, he explored in South Africa, landing at the 
Cape of Good Hope and collecting in Cape Colony, the Orange 
Free State, the Transvaal and Natal, reaching Durban in March 
and proceeding northward by sea to Delagoa Bay, Beira, Mozam- 
bique, Dar-es-Salam and Zanzibar, returning to Europe by the 
Suez Canal. 
His last extensive trip was made in 1904, when he reached 
Ceylon in February, proceeded to Australia, Tasmania, New Zea- 
land, Samoa, the Sandwich Islands, and returned to Europe by 
way of the United States. 
He studied his extensive collections principally at the Royal 
Botanical Garden in Berlin and at the Royal Gardens at Kew, 
England, where the writer had the pleasure of meeting him for 
the first time in 1888. The scientific results of these expeditions 
are mostly presented by him in the three volumes entitled “ Revisio 
Generum Plantarum, cum Enumeratione Plantarum Exoticarum 
in Itinere Mundi Collectarum,” published from 1891 to 1898 ; in 
these he gives a list of plants collected, with many critical notes, 
records of geographic distribution, descriptions of species new to 
science, and discussions of nomenclature, this subject being one 
to which he paid enthusiastic attention and through which he 
