Journal of Agricultural Research 
Vol. I, No. 2 
168 
and the date of Hartweg’s collection, made at a considerable altitude in 
the foothills, suggests the probability that the Fremont specimen was 
secured in the upper waters of one of the many mountain tributaries 
which he visited. 
From abundant material collected near Palm Springs and in the 
Banner Canyon of San Diego County and from field notes covering 
several seasons’ observations the following detailed description of this 
new species has been drawn. 
Prunus eriogyna, n. sp. (Fig. 5.) 
Prunus fremonti 1 S. Watson, in California, Geological Survey, Botany, v. 2, Cambridge (Mass.), p. 
442-443, 18S0, 
Amygdalusfremonti (S. Watson) Abrams, in Bull. N. V. Bot. Gard., v. 6, no. 21, p. 385, Sept., 1910. 
Illus., Schneider, C. K., Laubhk., Lfg. 5, P- 598, fig. 33s, u, v. 
A spiny, intricately branched and angled shrub reaching 4 meters in height. Twigs 
of young growth glabrous, bright reddish brown, becoming silvery gray or brown 
with age. Bark on old stems black, breaking into thin plates or scales. 
Leaves variable, lanceolate, ovate or orbicular, or sometimes broader than long, 
rounded or cordate at the base, narrowing abruptly to a short acute apex or often 
rounded or obtuse; glandular denticulate, usually with one or more larger glands 
near the base or rarely on the petiole; both surfaces pale grayish green, shining above, 
firm, sometimes leathery; midrib and veins prominent on under surface; stomatesin 
both upper and lower surfaces; 1.5 to 3 cm. long, 1.5 to 2.5 cm. or more broad; petiole 
6 to 8 mm. long; stipules minute, narrowly acuminate, glandular denticulate. 
The perfect flowers, borne in small umbels and having a faint, agreeable odor are pro¬ 
duced in great profusion, appearing from January to March, according to rainfall, when 
the leaves are partially developed. Imbud they are white, salmon, or rose pink. Ex¬ 
panded they are usually 6 to 8 mm. in diameter, reaching 18 mm. in some forms, on 
slender pedicels 6 to 12 mm. long; calyx tube short, campanulate; outer surface 
glabrous or thinly pubescent; inner covered with a salmon or rose colored pigment; 
lobes oval, half as long as the petals, finely pubescent on inner surface, glandular 
ciliate, often hanging loosely in a dried condition around the pedicels of the mature 
fruits; petals white, pink, or rose, 3 to 6 mm. long, oval, incurved at apex, base round¬ 
ing to a stout claw; stamens about 24 to 30, many imperfect; ovary and lower portion 
of the style finely pubescent; stigma but little expanded. 
The fruit, which ripens in May, is in appearance a small apricot, 1 to 2 cm. long, sub- 
globose, ovoid or oblong ovoid, sometimes oblique, slightly or decidedly compressed; 
apex mucronate; skin puberulent, dull yellow or greenish yellow, often with a dull- 
rose flush, with a well-marked ventral suture along which the thin astringent flesh 
opens in ripening, sometimes allowing the stone to drop, while the desiccated flesh 
remains attached to the peduncle; stone smooth or slightly roughened, usually flat¬ 
tened or somewhat turgid, obtuse at both ends with a well-marked dorsal furrow and a 
thick ventral expansion along the middle of which is a low, acute ridge separated by 
smooth, narrow furrows from two obtuse parallel ridges; often one or more pairs of 
obscure veins extend from the base and branch along either side; stony walls thick, 
1 “ P. Fremonti. A spiny glabrous densely branched shrub or small scraggy tree (15 feet high) with short 
branchlets: leaves small (4 to 8 lines long), thin, ovate or roundish, on short slender petioles, denticulate: 
flowers appearing with the leaves, solitary or somewhat fascicled, 5 or 6 lines broad, on pedicels 2 or 3 lines 
long: calyx lobes ciliate: ovary densely pubescent; style elongated: stone oblong, turgid, rounded on one 
side and with a broad ridge upon the other, 5 lines long. 
“Coast Ranges of Southern California, Oriflamme Caflon, San Diego County (D. Cleveland)', San Ber¬ 
nardino Mountains, Parry & Lemmon, n. 108, 1876. Also collected by Fremont in 1846, locality uncertain. 
Flowering in March; fruit probably with little pulp." 
