440 | BOTANICAL GAZETTE [DECEMBER 
magnolias and camellias; Inp1A: Pinus excelsa (found also in an 
isolated area on a height in Greece), Acer oblongum, Corypha 
australis; New GUINEA, AUSTRALIA, and NEw ZEALAND: Araucaria 
Bidwellii, A. Cunninghamii, Melaleuca styphelioides, Calistemon 
saligneum alba, Grevillea robusta; SANDwicH IsLANDs: Pritchardia 
pacifica; Brazit and the ARGENTINE: Eugenia Michelii, Arau- 
caria brasiliensis, Prosopis torquata; ANDES, PERU, BotrviA: Schinus 
molle, Phytolacca dioica; Mrxico: Pinus Montezumae, P. patula, 
Taxodium mucronatum, yuccas and agaves in regions of less rain; 
West Inpres: Cordia martinicensis; FLormDA and the ADJACENT 
Gutr States: Sabal Adansoni, Magnolia grandiflora, Planera 
aquatica, Liquidambar styraciflua, Torreya taxifolia, Persea Borbonia. 
The plants chosen from the large number in the garden to represent 
the above regions have been selected particularly because they are 
well known as types of peculiarly significant societies. Another con- 
sideration, which is also a limitation, has restricted the examples to 
certain groups, such as the conifers and palms, because it has 
been impossible in many other cases to secure data as to the exact 
climatic conditions under which the trees are found in a natural state. 
Information of an exact nature in reference to this is most meager, 
as everyone knows who has consulted floras to find the ranges of 
species or the habits of plants with regard to environment. No 
plants were placed in the list which do not seem to be reasonably 
vigorous, and many of them are growing most vigorously, as will be 
seen by the following measurements of circumference taken 30°" 
from the ground: Pinus excelsa 297°", Camphora officinalis 278°" 
(spread of horizontal branches 12™), Taxodium mucronatum 258°", 
Sequoia sempervirens 239°™, Cedrus Libani 227°, Araucaria Bid- 
wellii 195°", Ginkgo biloba 191°™, Chamaecyparis Lawsoniana 
172s 
The classification shows that the garden represents plants from 
61° north latitude to 48° south latitude. Countries are represented 
with an annual rainfall of 20 to more than 220°". There are plants 
from the high mountains, the Canary pine growing at 2000"; Pinus 
excelsa has a range on the Himalayas of 1800 to 3200"; Taxodium 
mucronatum grows on the highlands of Mexico from 1600 to 23005 
and Pinus Montezumae from 2500 to 4400™ on Orizaba. There are 
