The writer has made rather an intensive study of the forms in Wells County and in the Lower Wabash Valley and has not been able to satisfy himself that, allowing for a reasonable variation, there is even a varietal difference in Indiana forms. The description has been drawn to cover all of the forms of Indiana. Dr. J. Schneck of Mt. Carmel, Illinois, was one of the first to discover that this form was not our common red oak, and when he called Dr. Britton's attention to it, Dr. Britton named it _Quercus Schneckii_ in honor of its discoverer. =13.= =Quercus ellipsoidàlis.= E. J. Hill. Hill's Oak. Plate 52. Medium sized trees; inner bark yellowish; twigs pubescent at first, becoming smooth and reddish brown by autumn; leaves on petioles 2-5 cm. long, ovate to slightly obovate or nearly orbicular in outline, 7-15 cm. long, wedge-shape or, truncate at the base, margin divided into 5-7 long lobes by wide sinuses which usually extend to more than half way to the midrib, sinuses rounded at the base, lobes broadest at the base or the apex, ending in 1-7 bristle points, leaves at first pubescent, both above and below, soon becoming glabrous above, and smooth beneath except tufts of hairs in the axils of the principal veins; acorns nearly sessile or on short stalks, single or in pairs; nuts oval to oblong, 12-20 mm. long, enclosed for 1/3-1/2 their length in the cup; scales obtuse, light reddish-brown, pubescent on the back; kernel pale yellow and bitter. =Distribution.=--Northwestern Indiana to Manitoba and south to Iowa. In Indiana it has been reported only from Lake and Porter Counties by Hill, and from White County by Heimlich. According to Hill, who has made the most extensive study of the distribution of this species in our area, the tree is found on sandy and clayey uplands, and in moist sandy places. It closely resembles the pin oak for which it has been mistaken. It also resembles the black and scarlet oaks. We have very little data on the range or distribution of the species in this State.