=Distribution.=--Nova Scotia south to Delaware and west to the eastern edge of the Great Plains area. Fairly well distributed over the entire State of Indiana. Specimens have been seen from the following counties: Allen (Deam); Dearborn (Deam); Decatur (Deam); Elkhart (Deam); Fulton (Deam); Gibson (Schneck); Hancock (Mrs. Chas. C. Deam); Henry (Deam); Jackson (Deam); Jay (Deam); Jefferson (Deam); Jennings (Deam); Knox (Deam); Lake (Deam); Marion (Mrs. Chas. C. Deam); Marshall (Deam); Newton (Deam); Porter (Deam); Randolph (Deam); Ripley (Deam); Shelby (Mrs. Chas. C. Deam); Sullivan (Deam); Tippecanoe (Deam); Wabash (Deam); Warren (Deam); Wayne (Deam); Wells (Deam); White (Deam). =5a.= =Salix discolor= variety =eriòcéphala= (Michaux) Andersson. Differs from the species chiefly in rather densely pubescent twigs and buds; thicker and more lanceolate leaves, usually more or less pubescent beneath; and the sometimes more densely pubescent catkins. [Illustration: Plate 14. SALIX DISCOLOR Muhlenberg. Pussy Willow. (× 1/2.)] =Distribution.=--Range of the species but less common. Specimens have been seen from the following Indiana counties: Cass (Deam); Decatur (Deam); Fulton (Deam); Gibson (Schneck); Jackson (Deam); Jay (Deam); Knox (Deam); Laporte (Deam); Pulaski (Deam); Sullivan (Deam); Warren (Deam); Wayne (Deam). =2. PÓPULUS.= The Poplars. Rapidly growing trees; buds usually large, scaly and more or less resinous; leaves alternate, broad, toothed or sometimes lobed; flowers appearing before the leaves on large pendulous catkins; anthers red or purple. In the following key mature leaves from trees are considered: Petioles round or channeled, scarcely or not at all flattened laterally. Leaves chalky-white tomentose beneath, some of them more or less lobed, blades 6-10 cm. long 1 P. alba. Leaves pubescent or whitish tomentose while young, never lobed, blades 10-17 cm. long 2 P. heterophylla. Petioles strongly flattened laterally especially near the blade. Winter buds more than 8 mm. in length, stamens more than 20, capsules more than 3 mm. in diameter, leaves broadly deltoid, majority more than 8 cm. wide 3 P. deltoides. Winter buds less than 8 mm. in length, stamens fewer than 20, capsules less than 3 mm. in diameter, leaves roundish ovate, majority less than 8 cm. wide. Winter buds more or less pubescent, dull; leaves generally with less than 12 teeth to a side 4 P. grandidentata. Winter buds smooth or rarely somewhat pubescent, glossy; leaves with more than 12 teeth to a side 5 P. tremuloides.