132 BULLETIN 1282, U. S. DEPARTMENT OF AGRICULTURE 
cracks at apex or base or both, but only occasionally are the halves of hull 
completely divided; other cracks often occur on apex and base of hull. Ripens 
August 20 to September 25. 
Hulled nut.—(Pl. XV, C.) Size varies much; small in dry seasons, average 
medium (12 by ¢ by 2 inches). Number of nuts to the pound, 130 to 170. 
Percentage of kernel to nut in hand-cracked samples, 58. 
Shape: Rather flat, medium long, pointed, ovate (viewed edgewise, long taper- 

middle, with tendency to decrease in curve near apex; ventral flange medium 
in thickness, prominent to medium prominent; wing rather thin, very promi- 
nent entire length of ventral edge. Longitudinal depressions accompanied by 
ridge common. Dorsal edge somewhat curved, but less so than ventral edge; 
dorsal ridge narrow and fairly prominent; suture line frequently showing. 
Base plump; may be wide or somewhat constricted; dorsal shoulder drops off 
abruptly near edge of stem scar; ventral shoulder sharply rounding or sloping 
stem scar rather small, narrow, oval, and at right angles to the axis or 
slightly sloping dorsally. Apex tapering, with rather prominent wing ending 
in a thin sharp point. 
Shell: Very soft; outer surface light brown in color, usually brittle and 
crumbly. Pits few to medium in number, large and fairly deep. Surface be- 
tween pits stippled. Network coarse, fibers large. Canals very large, oval. 
Inner shell thin and hard. Inner surface undulating, light yellowish brown in 
color. Ventral streak dark brown, very long, medium in width, tapering from 
middle to base, base acuminate. 
Kernel: Size rather large (average, 14 by 2 by #2 inches). Plump, long, 
oblong-ovate. One side frequently has long groove or crease. Ventral edge 
gently curved. Dorsal edge curved less than ventral, thinner and longer. Base 
usually somewhat truncate, sometimes round; dorsal shoulder usually some- 
what square; ventral shoulder abruptly rounding. Apex rather broad. Pellicle 
dark brown, thick, tough; pubescence exceedingly thick and long, giving it a 
very rough appearance; pellicle fold small. Flavor slightly sweet, fair. 
Distinguishing characteristics —Nut medium in length, rather pointed ovate, 
shell soft, wing thin and quite prominent along entire ventral edge, ending 
in sharp point at apex, base plump, stem scar at right angles to axis or slightly 
sloping dorsally; kernel large, long, oblong-ovate, pellicle dark brown, pubes- 
cence heavy. 
The Trembath resembles in shape the Batham, Henle, I. X. L., and Smith. 
(See “ Distinguishing characteristics” of these varieties for points of dif- 
ference. ) 
COMMENTS 
The outer shell of the Trembath nut crumbles badly. The appearance of 
the kernel with its coarse, rough, dark-brown pellicle is not attractive. The 
flavor of the kernel is inferior to that of the I. X. L. The large size of the 
nut when grown under favorable conditions and the large plump kernel are 
points in its favor. The Trembath nut should not be grown where the I. X. L. 
will do well. 

74. WALTON (WALTON PAPER SHELL) 
\ A seedling variety originated on the John Walton ranch, near Oakley, Calif., 
about 1890. A considerable number of trees of the variety were planted in the 
Oakley district. With the exception of a few scattering trees the Walton is not 
found elsewhere. 
Description 
TREE 
Upright with wide top (ratio of height of head to width, 1:14), quite 
vigorous. Trunk quite stocky; bark reddish brown, less rough than in most 
varieties, exfoliates in thin flakes. 
Main branches.—Medium in length and stockiness, tend to grow slightly 
curved or wavy. Branching angle acute. Wood tough. Bark reddish brown, 
with patches of gray epidermis; exfoliates in small flakes; striations common 
on wood 1 to 4 years old. 
Twigs.—Rather short and slender as a rule. Internodes short to medium in 
length (4 to 1 inch). Nodes considerably targer in diameter than internodes. 
Bark smooth, deep green with reddish patches near nodes in fall. 
ing, ovate). Ventral edge gradually curved, most curved near base or near - 
