Tree small, upright-spreading, hardy, productive; branches ash-gray, smooth, with small, inconspicuous, oval lenticels; branchlets thick, with rather short internodes, covered with thin bloom and marked with scarf-skin, dull brownish-drab, pubescent, with a medium number of small, raised lenticels; leaf-buds intermediate in size and length, conical, free, plump; leaf-scars enlarged.
Leaves folded upward, two and one-quarter inches wide, four inches long, roundish-oval or obovate, thick; apex abruptly pointed, base acute, margin crenate and with small, dark glands; upper surface light green, sparingly pubescent and with a grooved midrib; lower surface silvery-green, pubescent; petiole three-quarters inch long, thick, pubescent, faintly tinged red, with from one to three large, globose glands mostly on the stalk.
Season of bloom intermediate in time and length; flowers appearing after the leaves, nearly one-half inch across, white, the buds yellow-tipped as they unfold; borne in clusters on short lateral spurs, in pairs; pedicels one-half inch long, thick, pubescent, green; calyx-tube greenish, campanulate, thinly pubescent; calyx-lobes broad, obtuse, glandular, pubescent on both surfaces, reflexed; petals roundish, entire, not clawed; filaments five-sixteenths inch long; pistil glabrous, equal to the stamens in length.
Fruit early, season short; one and one-quarter inches in diameter, roundish-oval, slightly truncate, halves equal; cavity shallow, narrow, abrupt; suture shallow or a line; apex roundish to flattened or sometimes depressed, often oblique; color dark reddish-purple, covered with thick bloom; dots numerous, small, russet, inconspicuous; stem of average thickness, five-eighths inch long, pubescent, adhering well to the fruit; skin thin, tough, not astringent, separating readily; flesh lemon-yellow, juicy, coarse, firm, sweet, mild but pleasant; very good; stone free, three-quarters inch by five-eighths inch in size, oval, slightly oblique, blunt-pointed, with rough and slightly honeycombed surfaces.
EARLY RIVERS
Prunus domestica
1. Downing Fr. Trees Am. 314, 1845. 2. Horticulturist 4:40. 1849. 3. Elliott Fr. Book 419. 1854. 4. Downing Fr. Trees Am. 912. 1869. 5. Am. Pom. Soc. Rpt. 99. 1871. 6. Mas Pom. Gen. 2:117. 1873. 7. Jour. Hort. 30:273. 1876. 8. Oberdieck Deut. Obst. Sort. 409, 411. 1881. 9. Hogg Fruit Man. 699. 1884. 10. Mathieu Nom. Pom. 447. 1889. 11. Lucas Vollst. Hand. Obst. 470. 1894. 12. Guide Prat. 152, 356. 1895. 13. Rivers Cat. 35. 1898.
Early Fruchtbare 12. Early Prolific 4. Early Rivers 4, 10, 12. Early Prolific 2, 3, 6, 10, 12, 13. Fertile Précoce 10. Fertile Précoce 6, 12. Frühe Fruchtbare 6. Frühe Fruchtbare 8. Prolifique Hâtive 10, 12. Rivers’ Early No. 2 1, 2, 3, 4, 10. Rivers’ Early Prolific Plum 2. Rivers’ Early Prolific 4, 9, 10, 12. Rivers’ Early 6. River’s Early 5. Rivers’ Blue Prolific 7. Rivers’ No. 2 9, 10, 12. Rivers Frühpflaume 8, 11. Rivers’ Frühe Fruchtbare 10.
Early Rivers is widely known because of its earliness, productiveness, regularity of bearing and desirability for culinary purposes. In New York, however, the plums are so small and drop so badly as they ripen that the variety is worthless for commercial purposes. Hogg, in the reference given above, notes the following peculiarity of the trees of this variety: “The original tree throws up suckers, which, when removed and planted out, do not bloom for several years; but scions taken from the original tree and grafted, bloom the second year. A curious fact is that the grafted trees fruit abundantly, and the branches are so brittle they break off; in those raised from suckers the branches never break. The grafted trees in spring are full of bloom, sparing of shoots, and very few leaves; the suckers are more vigorous in growth, have no bloom, but an abundance of foliage, even when six years old.” This variety is a seedling of Early Tours raised by Thomas Rivers of Sawbridgeworth, England, about 1834. It was first disseminated under the names Early Prolific and Rivers’ Early No. 2 but, in 1866, Hogg with the permission of the originator, renamed it Early Rivers under which name it is now generally known.