190 



laden with unripe fruit. The male inflorescence is of minute yellowish 

 green flowers, arranged in small umbels on a raceme. Perianth 

 6-cleft, in two series. Stamens 3, fleshy, with 2 anther-cells 

 (rarely 3) imbedded in their substance, and opening outwardly by an 

 orbicular operculum. These characters seem to indicate a genus 

 hitherto undescribed, and certainly prove the Itaiiba to be distinct 

 from the greenheart of Demarara {Nectandra Rodicei), with which 

 some of the English settlers here have supposed it identical. As 1 

 have before informed you, the Itaiiba is the most valuable timber for 

 shipbuilding which the Amazon aflbrds. Its range seems to be from 

 the mouth of the Tapajoz to that of the Rio Negro, and it is most 

 abundant on the Rio Trombetas. It prefers gravelly or stony rising 

 ground, and is never found in marshes." 



The gnaphalioid Composite characterized in Dr. Asa Gray's paper 

 are — Skirrophorus, Z>C., divided into three named sections: 1. Skir- 

 rophorus, including the species Cumiingharai, DC, Preissianus, 

 Steetz., eriocaulus, Hook.Jil., pygmaeus, Asa Gray ; 2, Pogonolepis, 

 including stricta, Steetz. ; and 3. Pseudopappus, including demissus, 

 Asa Gray, Nematopus eff'usus, Asa Gray, Chrisocoryne, Hugelii, 

 Drummondii, and Myosuroides, Asa Gray, and Cephalosones gymno- 

 cephalus, Asa Gray. All these plants are from Swan River. 



Notice of ' The Gardener's Magazine of Botany,' Nos. 15 and 16, 



April and May, 1851. 



The papers in the fifteenth number of this admirable journal are 

 intituled — 



'Francisca confertiflora,' being the description, history, and direc- 

 tions for the culture of a beautiful shrub of the order Scrophulariaceae.' 



' Vegetable Physiology ;' by Arthur Henfrey, Esq., F.L.S., Lecturer 

 on Botany at St. George's Hospital.' 



' New and Rare Plants,' giving some account of their culture and 

 appearance. 



' Contributions to the Aquariaura ; by Mr. George Lawson, F.R.P.S., 

 F.B.S.E, Assistant Secretary and Curator to the Botanical Society of 

 Edinburgh.' 



' Hints on Seed Sowing ; by Mr. M. Saul, gardener to Lord Stour- 

 ton, Allerton Park, Yorkshire.' 



' Hemiandra pungens,' being the description, history, and directions 

 for the culture of a low, shrubby, labiate plant from the Swan River. 



