The origin of Black Hamburg is apparently unknown. It was sent from Hamburg, Germany, to England sometime in the early part of the eighteenth century and it was in the latter country that it was given the several variations of the name Hamburg. In the north of Europe it is known as Frankendale or Frankenthal. Black Hamburg is grown in Europe chiefly as a forcing grape. It is doubtful if all the synonyms refer to one seed variety, but if not the same, they are so similar as to be difficult if not impossible to distinguish from each other. Vine vigorous, tender, productive. Canes long, numerous, rather thick to medium, light brown but darker at nodes, covered with faint pubescence; nodes enlarged, slightly flattened; internodes short to medium; diaphragm thick; pith large; shoots slightly pubescent; tendrils intermittent, frequently several nodes with no tendrils, long, bifid to trifid, dehisce early. Leaf-buds large to medium, rather long, somewhat thick, conical to obtuse. Leaves good size, thin; upper surface light green, rather dull, of average smoothness; lower surface slightly lighter than upper surface, with small amount of pubescence, hairy; veins moderately distinct; lobes vary from none to five, terminal lobe nearly acute; petiolar sinus often strongly urn-shaped, of average depth, nearly narrow, sometimes closed and overlapping; basal sinus shallow to narrow; lateral sinus rather deep to narrow, often notched; teeth very irregular in depth and width. Fruit ripens early in October, keeps well. Clusters large, long to medium, rather broad, cylindrical to tapering, inclined to irregular, usually single-shouldered, nearly compact; peduncle medium to short, somewhat thick; pedicel long, slender, covered with small, numerous, prominent warts; brush short, thick, tinged with red. Berries rather large, oval to nearly roundish, dark purple to nearly black, slightly glossy, covered with faint blue or lilac bloom, do not drop from pedicel, moderate in firmness. Skin thin, tender, adheres to the pulp, contains no pigment, not astringent. Flesh pale green, tender, fine-grained, vinous, sprightly, rather sweet and refreshing, very good to best. Seeds separate easily, one to four averaging two or three, above medium size, long, rather narrow, sharply pointed, brownish; raphe obscure; chalaza intermediate in size, decidedly above center, distinct, circular to oval. BLACK HAWK. (Labrusca.) =1.= _U. S. D. A. Rpt._, =1865=:197. =2.= Fuller, =1867=:236. =3.= _Gar. Mon._, =9=:147, 214. 1867. =4.= _Ill. Hort. Soc. Rpt._, =1868=:175. =5.= Downing, =1869=:531. =6.= _Grape Cult._, =1=:14, 15. 1869. =7.= _Mich. Pom. Soc. Rpt._, =1878=:482. =8.= _Bush. Cat._, =1883=:75. =9.= _Mo. Sta. Bul._, =46=:37, 42, 44, 46. 1899. _Miller's No. 4_ (1, 6).