EXPLANATION OF HARDINESS RATINGS 
As this list goes all over the U. S. A. and also abroad, 
we believe it a good idea to indicate hardiness. This has 
been done by giving after the name of each item a 
number in ( ) indicating the zone up to which it is con- 
sidered hardy. 
Our authority through Zone 7 is Rehder’s Handbook. 
For Zones 8 to 10 we have been guided by Pacific Coast 
experience and have subdivided Zone 9 so that 
(9) indicates probably safe to 20° (Sacramento and 
San Joaquin Valleys, etc). 
(9%) indicates probably safe to 25° or 26° (San Fran- 
cisco Bay Region, etc.). 
(10) indicates will stand only very light frost. 
To find the zone you are in refer to map on center 
pages of this book, which we use by the courtesy of 
Arnold Arboretum and McGraw-Hill Book Co. 
We hope this innovation will be helpful to nursery- 
men all over the country. Please understand that rat- 
ings show our honest opinion, but we disclaim all re- 
sponsibility for their correctness. 
ABBREVIATIONS— 
A. M. R. H. S.—Given an Award of Merit by Royal 
Horticultural Society of England. 
F. C. C. R. H. S. indicates their First Class Certificate 
which is a distinction rarely conferred. 
A. M. C. H. S.—Given an Award of Merit by Califor- 
nia Horticultural Society. 
H.C.C. refers to the Horticultural Color Chart now 
coming into wide use. The exact color tone will be 
found at point shown. This chart may be obtained from 
American Nurseryman, 343 S. Dearborn St., Chicago, 
for $12, we believe. 
Letters A, B, C, D, E — indicate sizes available. 
LINING OUT STOCK— 
For convenience, this is assembled on page 37. The 
list includes several new and uncommon items not 
available elsewhere, so deserves careful scrutiny. 
POT GROWN AND GALLON CAN STOCK— 
We find that many customers, especially those at a 
distance, prefer to have us remove soil and ship “bare 
roots” packed in moss. If you order any of this class of 
material please be sure to say whether you want it 
packed with or without soil on the roots. 
California nurserymen will please note that 4-in. pot 
stock in body of list can usually be transferred at once 
to gallon cans for immediate sale, while the smaller 
sizes for growing on, together with 2% and 3-in. pot 
stock, can be found at the end of list. 

Again it seems too bad to have to issue such a short 
list, but nearly everyone knows that demand for good 
ornamental stock still so far exceeds supply that many 
lines are being ordered a year ahead and at “open 
price.’ We already have quite a number of orders 
booked for season 1950-51. 
With increased facilities and area, we hope that it 
will not be long until we can take care of the demand 
for the lines in which we specialize. 
W. B. CLARKE & CO. 
is a corporation whose officers are 
Walter B. Clarke WalterC.Borchers James F. Clarke 
President Sec’y.-Treas. Vice-Pres. 
