flora the 



the moister climitu of the immeilidte \ iLiuity of the 

 coast, near San Francisco however it provesi entirelj 

 batisfactory 



Pupulus „Um B„h„uu Poeudacatia and Ulmn-i 



t !( ,„ t ,t ,\ <t,]in^l> troublesome when used is 

 SI h « ill ti II 11 nil \^ streets, their surface roofs 



nnd the suckeis touu 

 up m the midst ot 

 lawns sever il jards 

 away from the parent 

 tree 



Ptcns maoophylld 

 IS another tree injuri 

 ous to sidewalks 



JSucahipiHS Globu 

 his, and m fact almost 

 all species of the ge 

 nus, are frequently 

 debarred b-s townordi 

 nance from growth 

 withm 00 or even 70 

 feet of a sewer, on ac 

 count of the remarka 

 ble length and pene 

 tratmg power of their 



Paulounia impeii 

 aht. IS sometimes ob 

 lected to on account 

 of the somewhat un 

 tidy appearance of the 

 persistent seed pods 

 which require no little 

 labor if all are to be 

 removed after flower 

 ing 



GieviUea » obusta 

 has brittle wood and is 

 usually much broken m 

 heavy winds, but can 

 be used with satisfac 

 tion if kept well cut 

 back 



The species of Phoc 

 nix and Jubtea should 

 be avoided on account 

 of their low, wide 

 spreading habit, ex 

 cept for avenues and 

 boulevards where there 

 IS no sidewalk or where 

 there is from 20 to 30 

 feet space between 

 sidewalk and drive 



Ailanthiis glandu 

 losa has a bad reputa 

 tion on acfount of its 



disagrfi-:ili!,' .HJ.ir. Imr -.v 



(fruit-1 - ' I. 



8. 2'n I s / . A II.,, I, ,S"./.<.- There are many places in 

 those parrs ut The stiire that enjoy a high temperature 

 and low rainfall, where the percentage of alkali salts iu 

 the soil is too great for the cultivation of most of our 

 ornamental trees, and where it is very important that 

 some shade-producing species be grown. 



TolAant of medium alkali (chiefly "white" salts) 

 Aeaoii melanoxjlon Eucalyptus rostrata {Fit 



AiHiitus glandulosi 2o66) 



Albizzia lophantha Eucaljptus sideroxylon 



C isuaiina equisetifolia vii losea 



Eucahptus imygdalma Phoeuix dactylifera 



\ar mgustifolia (appa Platanus onentahs 



lently the least sensi Populus Frenionti 



tive ot the Eucalypts) Quercus lobata 



Robmia Pseudacaeia 

 AAA Only fairly toletant 

 Acer macrophylhim Cmnamomum C amphora 



Acei Negiindo \ar Cab (Vleditsehia tiiacanthos 



foniK um Ulmus spp 



Wa!,hingtonia filtfera 

 \AA1 Ti'.led and 

 loiDul iDisHitable 

 Most of those trees 

 ot the humid regions, 



been 

 nd to 



/in 



kiterculia dnerbif I 

 Melanoxylon Blai 1 

 phora Camphor Tr 

 Flame Titc Eii , 



(Jiicniis p.duiuulata 

 anil species of Tilia 



Smee writing the 

 above, the following 

 additional information 

 on the alkali tolerance 

 of ornamental trees 

 has been brought to 

 light through the m 

 vestigations of Dr R 

 H Loughridge of the 

 Agricultural Experi- 

 ment Station at Berke 

 ley, and has courte 

 ously been placed at 

 my disposal 



Total amount of salts 

 actually found m the 

 upper four feet of soil 

 in which the following 

 trees were growing, ex 

 pressed in tons per 

 acre ip^^, ^^j. ^^^^ ^^ 

 depth ot 4 teet 

 Kcelreuteri i p lui 



culata S2 



Platanus onentahs 21% 

 Eucalyptus* amyg 



d ilin I 20 



Eucalj-ptus aiig:us 



tifoha 20 



Wasbingtonia(spe 



cies not stated) 7H 

 Phoenix dactyliteia 5 

 tmnam omum 

 C amphora i% 



Jos BuETT Da\ y 



IV Trees fob 



SOUTHEEN CaLI 



F 11 VIA -SIteetTtees 



1 I ttle Tree Acacia 



nnamommn Cam 



f lia Australian 



s„mi, M.li,„any 



Tole-. 



The most alkali-tolerant 1 

 Kirlreuteria paiiiculatn, a 

 high, with feathery, pinna 

 yellow blossoms. 



" alkali [Sodium ear- 



e of those yet tested is 

 all species 15 to 30 feet 

 leaves and ornamental 



