56 



JOURNAL OF THE ARNOLD ARBORETUM [vol. in 



beris Purdomii Schneider, Rhododendron Purdomii Rehder & Wilson, 

 Prunus Padus pubescens forma Purdomii Koehne, and Leptodermis Pur- 

 domii Hutchinson. 



The following plants first introduced by Purdom have been raised 

 at the Arboretum: Larix dahurica var. Principis-Ruprechtii Rehder & 

 Wilson, Picea Meyeri Rehder & Wilson, Abies sutchuensis Rehder & Wil- 

 son, Rerberis circumserrata Schneider, Rerberis Dielsiana Fedde, Rer- 

 beris Gilgiana Fedde, Rerberis Vernae Schneider, Deutzia hypoglauca 



grandiflora Bunge, Indigof< 



Max 



ifol 



Schneider, Prinsepia uniflora Batalin, Paeonia svffruticosa var. spon- 

 tanea Rehder (Moutan), Cotoneaster gracilis Rehder & Wilson, Viburnum 

 kunsuense Batalin, Daphne Giraldii Nitsche. 



Purdom sent to the Arboretum 550 packages of the seeds of trees and 

 shrubs; and in the Arboretum Herbarium there are specimens collected 

 by Purdom under eleven hundred numbers. 



E. H. Wilson in East Africa.— The following notes on some of the 



important trees of East Tropical Africa are from a letter recently re- 

 ceived from Mr. Wilson and written at Monbasa on his return to the 

 coast from a journey in the mountain forests of the interior, undertaken 

 for the purpose of gathering material and information for the Arboretum. 

 From Monbasa Mr. Wilson intended to continue his journey southward 

 via Beira to Rhodesia and Cape Town. From Cape Town he will sail 

 for England, with the intention of being back in the early summer at 

 the Arboretum at the end of his two years' journey. 



"The tallest broadleaved tree in the forests west of Nairobi is a species 

 of Mimusops which often exceeds 150 ft. in height. It is smooth-barked 

 with a buttressed bole free of branches for a hundred feet or more and 

 the crown is sparse. Next in height among this class of trees is Pygeum 

 africanum Hook, f., a handsome tree fully 120 ft. tall. This tree has 

 reddish wood of good quality, a rough dark bark, a flattened round crown, 

 lustrous dark green leaves and a buttressed bole free of branches for 

 two-thirds the height of the tree. The most valuable of all the broad- 

 leaved trees of British East Africa is the so-called East African Camphor 



(Ocotea usambarensis Engl.), a truly magnificent tree. It grows about 



100 ft. tall and has a wide-spreading flattened crown of massive branches. 

 The bole is clean for from 50 to 75 ft. and is from 15 to 25 ft. in girth, slightly 

 buttressed at the base and clothed with dark scaly bark which is 

 red-brown beneath. The wood is pale- to rich-brown, fragrant, smelling 

 slightly of camphor. This tree favors the tops and slopes of steep ridges 

 and the lumber is difficult to obtain. These three trees are inhabitants 

 of the rain-forest though the two first-named extend into semi-dry regions. 

 Other lame trees of these forests arc Ochna sp., Panax sp., Weihea africana 



