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NATURAL HISTORY, TORONTO REGION Salix petiolaris, Sm.

" purpurea, L. (Purple Willow). Introduced. " sericea, Marsh.

Populus alba, L. (Silver-leaved Poplar). Introduced.

,,

balsamifera, L. (Balsam Poplar).

"   candicans, Ait. (Balm of Gilead). Very rare.

"   deltoides, Marsh. (Cottonwood). Very rare.

"   grandidentata, Michx. (Large-toothed As-pen).

nigra, var. italica, Du Roi. (Lombardy P.) Introduced.

tremuloides, Michx. (American Aspen). MYRICACEAE (Sweet Gale Family).

Myrica asplenifolia, L. (Sweet Fern). Common north of High Park.

JUGLANDACEAE (Walnut Family).

Juglans cinerea, L. (Butternut).

"   nigra, L. (Black Walnut). Infrequent. Al-most its northern limit.

Carya cordiformis, K. Koch. (Bitternut Hickory). Fairly common.

glabra, Spach. (Pignut). Very rare.

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ovata, K. Koch. (Shell-bark Hickory). Fairly

common.

BETULACEAE (Birch Family).

Corylus americana, Walt. (Hazelnut). Humber Val-ley.

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