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Fronds of small size, 1–4-pinnate, the lower surface almost always either hairy, tomentose, chaffy, or covered with a fine waxy white or yellow powder.

Sepals.—Rather narrow; six lines long or less; minutely tomentose.

P. thin campan. then exp. tomentose, squamulose; g. free, grey then blackish; s. narrowed upwards, glabrous above, downy below, base with white tomentum.

Lower side of leaf densely tomentose White Poplar, Populus alba. 6b.

Leaves 5 to 6 in. long, oval to obovate, acute, obtuse, or even cordate at base, regularly but usually not deeply sinuate, rather rigid, usually very tomentose beneath.