The leaves are broader than in most willows, and are generally either deltoid or ovate in shape, often cordate at the base, and frequently with slender petioles vertically flattened. [Please select]
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_ _Having_ the shape of a _heart_; as a cordate leaf. [Please select]
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The cordate leaves at the base of the stem were always produced, however, no matter to what intensity of illumination that part of the plant was subjected. [Please select]
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It is therefore safe to conclude that the cordate leaves are inherited forms, and that the lanceolate organs are adaptations to light which may be shown by any individual of the species. [Please select]
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