42 PKOF. OLTVKR OK THREE NEW GENEKA 



in some imported manures, and (5) the migrations of birds from 

 one country to another, and the influence of periodical winds 

 and tides. All these causes are in daily operation, and are topics 

 worthy of consideration ; hut perhaps it may be equally profit- 

 able to notice the extraordinary facility with which some plants 

 adapt themselves at once to the soil and climate, whilst others 

 spring up, languish for a time, and die out. This peculiarity 

 gives an indication of the kind and character of many plants 

 which might be profitably introduced into the colony. It may be 

 regarded, indeed, as a hint furnished by nature for the benefit of 



the inhabitants. 



With much respect, I remain, &c. &c, &c# 



William Woolls. 



Parramatta, September 20, 1866. 



1 



Description of Three New Genera from West Tropical Africa 



J 



belonging to the Natural Orders Guttlferce^ Olacincce and Celas- 

 tracecd. By Professor Oli^r, Keeper of the Kew Herbarium. 



[Read December 20, 1866.] 



Allanblackia *, genus novum Guttiferarum. 



riores dioici : Se^pala 5, orbicularia, late imbricata, interiora 

 majora, coriacea, margine scariosa. JPetala 5, late obovato- 

 cuneata, sepalis longiora, alabastro imbricata et In globum 

 conniventia. Flores <J : 8ta/mina 5-adelpha, phalangibus 

 petalis oppositis, crassis, cuneato-spathulatis, apice dilatatis, 

 anthcras sessiles sursum et introrsum gerentibus ; antherse 

 liberie, late ellipticae v. rotundatas, longitudinaliter dehis- 

 centes. Discus centralis 5-lobus, lobis plus minus expla- 

 natis, phalangibus andro^cii alternantibus, intus transversiin 

 corrugatis. Flores $ : Discus (jm^cecii rudimentum?) bre- 

 vis, crassus, lobatus, ovarii basin cingens. Ovarium conicuin 



) 



erassum, placentis 5 multiovulatis prominulis baud coalitis 



■ \ 



' *. 



AU 



lerbarium. Through ; 

 his hands nearly all the collections received at Kew from West Tropical Africa 

 passed ; and to his very extensive knowledge of plants and untiring industry . 

 we greatly owe the present accessible state of these collections, as well as pre* 

 liminary analyses and notes upon many of the more remarkable species. 





i-^ 



