78 BULLETIN 1282, U. S. DEPARTMENT OF AGRICULTURE 
and longer than ventral. Base truncate or round; dorsal shoulder square; 
ventral shoulder sloping, but less than in the Rock type Jordan. Apex wide, 
blunt, with a small and usually recurved point. Pellicle medium thick, medium 
tender, light to dark brown; pubescence coarse and abundant; veins distinct; 
base sear small to medium, dark brown; pellicle fold small and on apex third 
of ventral edge. Flavor good, nutty, with very slight bitter flavor. 
Distinguishing characteristics—Shell hard. Shape long ovate; apex broad 
scimitar shaped: ventral streak long and slightly pointed at base; pits medium 
number, shallow and small; wing more prominent than in the Rock type Jordan; 
kernel long, pubescent, with sloping ventral shoulder; and more plump than in 
Rock Jordan. It is easy to distinguish this nut from other Jordans. 
COMMENTS 
The Malaguena Jordan is found to give light crops, when the average is taken 
over a series of years; the percentage of Kernel to nut is small. The kernels are 
attractive in appearance, but in some seasons a considerable number are de- 
formed. The nuts ripen rather late and are sometimes injured by early fall 
rains. Although the total quantity of the nuts produced amounts to several 
tons annually and the variety is found in every almond-growing district in 
California, the trees are scattering and were planted by various orchardists 
merely for the purpose of testing the variety. The Malaguena Jordan is not 
suitable for commercial planting. 
40. JORDAN (ROCK JORDAN) 
Origin.—This variety is called the Rock Jordan to distinguish it from. sev- 
eral other Jordans. It was introduced from Spain by John Rock, of Niles, 
Calif., in 1897, and later, in 1901, by David Fairchild, of the Office of Foreign 
Seed and Plant Introduction, United States Department of Agriculture. The 
variety was planted in every district in California and soon was sold by 
nurserymen in several other States. In late years most of the Jordan orchards 
have been worked over to other varieties or removed, but trees are still found 
in all almond districts. 
Description 
TREE 
Upright (ratio of width of head to height, 1:14). Only moderately vigorous, 
varying much in this regard. Trunk stocky on good soil; bark moderately 
rough, exfoliates in large flakes. 
Main branches.—Long, slender, numerous, upright. Branching angle acute. 
Large branches have tendency to have long flat depressions. Small branches 
slender and numerous, giving the outer portion of tree a thick, willowy appear- 
ance. Wood tough. Bark quite smooth except for exfoliations and striations, 
which are common; under bark dark, cherry brown, overlaid with patches of 
dark gray epidermis, sometimes to such an extent as to give the entire area 
of the branches a dark-gray appearance. 
Twigs—Medium in length, moderately vigorous, slender, willowy,. flexible. 
Branching angle sharply acute. Nodes medium in size. Wood tough. Inter- 
nodes rather short (4 to 1 inch). Bark green, tinged with red in autumn. 
Lenticels—Numerous; vary much in size, generally large (on bark 8 to 10 
years old, # by + to 3 by ¢ inch) ; wide, short, raised, rough, gray; wide ellip- 
tical, with wide, acute, and frequently tapering ends. 
Foliage—Dense. Leaves medium in number on individual branches. 
Blade: Size small (zs by 2 to 14 by 4 inches) ; average, ? by 2? inches; ratio 
of width to length, about 1:4). Shape usually long, narrow, elliptical; widest 
part near middle; occasionally ovate or obovate. Base bluntly acute; origin 
of margins symmetrical or nearly so. Apex acute. Margins frequently irregu- 
lar, curve from middle to either end usually about the same, but sometimes 
blade tapers from middle to apex more than from middle to base; finely cre- 
nate, doubly crenate, or occasionally serrate; bristles small, short, dark. Midrib 
usually large and prominent. Veins distinct. Upper surface light deep green. 
Lower surface a little lighter than upper. (See Pl. XX, A.) 
Petiole: Rather long (average, § inch; ratio of length of petiole to length 
of blade, about 2:7); heavy, stocky, and quite rigid; under surface pale green ; 
upper surface tinged with dull rusty red in autumn. Groove varies in width, 
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