Occasionally cultivated in the eastern United States and in Europe, and hardy as far north as eastern Massachusetts; interesting as producing the smallest nuts of any of the known Walnut-trees.
5. [Juglans californica] S. Wats.
Leaves 6′—9′ long, with glandular pubescent petioles and rachis, and 11—15, rarely 19, oblong-lanceolate acute or acuminate glabrous finely serrate leaflets cuneate or rounded at base, 1′—2½′ long and ⅓′—¾′ wide, the lower often rounded at apex. Flowers: staminate in slender glabrous or puberulous aments 2′—3′ long; calyx puberulous on the outer surface with acute or rarely rounded lobes, its bract, puberulous; stamens 30—40, with yellow anthers and short connectives bifid at apex; the pistillate subglobose, puberulous; stigmas yellow, ½′ long. Fruit globose, ⅓′—¾′ in diameter, with a thin dark-colored puberulous husk; nut nearly globose, deeply grooved with longitudinal grooves, thick shelled, 4-celled at base, imperfectly 2-celled at apex; seed small and sweet.
A shrubby round-headed tree or shrub generally 12°—20°, rarely 40°—50° high, usually branching from the ground or with a short trunk 1° or rarely 2°—3° in diameter, and slender branchlets coated with scurfy rufous pubescence when they first appear, glabrous, reddish brown and marked by pale lenticels at the end of their first season and gray the following year. Winter-buds coated with rufous tomentum.
Distribution. Banks of streams and bottom-lands in the southern California coast region from Santa Barbara and the Ojai valley to San Fernando and the Sierra Santa Monica, and along the foothills of the Sierra Madre to the San Bernardino Mountains and southward to the Sierra Santa Anna.
A curious seminal variety (var. quercina Babcock) with compound leaves composed of 3 oval leaflets, the terminal long-stalked and 2 or 3 times larger than the lateral leaflets, is occasionally cultivated in California.
6. [Juglans Hindsii] Rehd.
Juglans californica S. Wats., in part.
Juglans californica var. Hindsii Jep.
