× _Quercus Lowellii_ Sarg., a possible hybrid of _Quercus borealis_ and _Q. ilicifolia_, has been found in the neighborhood of Seabury, York County, Maine. × _Quercus Porterii_ Trel., probably a hybrid of _Quercus borealis_ var. _maxima_ and _Q. velutina_, has been found on Bowditch Hill, Jamaica Plain, Suffolk County, Massachusetts, on College Hill, Easton, Northampton County, Pennsylvania, and near Columbus, Franklin County, Ohio. × _Quercus runcinata_ Engelm., believed to be a hybrid of _Quercus borealis_ var. _maxima_ and _Q. imbricaria_ first found near St. Louis, occurs also in the neighborhood of Independence, Jackson County, and at Williamsville, Wayne County, Missouri, and in Richland and Wayne Counties, Illinois. 2. Quercus Shumardii Buckl. _Quercus texana_ Sarg. in part, not Buckl. [Illustration: Fig. 223] Leaves obovate, seven rarely five-lobed, the lobes two or three-lobed and sometimes dentate at apex, on leaves of lower branches short and broad, and separated by narrow sinuses pointed or rounded in the bottom, on upper branches deeply divided by broad rounded sinuses into narrow acuminate lobes, when they unfold often tinged with red and covered with pale loose tomentum deciduous before they are half grown, at maturity glabrous, dark green and lustrous above, paler and furnished below with large axillary tufts of pale hairs, 6′—8′ long, 4′—5′ wide, with a thin midrib and slender primary veins running to the points of the lobes; petioles slender, glabrous, 2′—2½′ in length. Flowers: staminate in slender glabrous aments 6′—7′ long; calyx divided into 4 or 5 rounded slightly villose lobes shorter than the stamens; pistillate on pubescent peduncles, their involucral scales ovate, light brown, pubescent; stigmas red. Fruit: nut oblong-ovoid, narrowed and rounded at apex, ¾′—1¼′ long, ½′—1′ in diameter, inclosed at the base only in the thick saucer-shaped cup with a slightly incurved rim and covered with closely appressed ovate pale pubescent or nearly glabrous scales narrowed above the middle, abruptly long-pointed, thin or often conspicuously tuberculate. A tree up to 120° high, with a tall trunk occasionally 5° in diameter, stout wide-spreading branches forming a broad rather open head, and gray or grayish brown glabrous branchlets. Winter-buds ovoid, acute or acuminate, about ¼′ long, with closely imbricated gray glabrous or rarely pubescent scales. Bark 1′—1½′ thick, ridged, broken into small appressed plates scaly on the surface. Wood heavy, hard, close-grained, light reddish brown, often manufactured into lumber in the Mississippi valley and considered more valuable than that of the northern Red Oak.