Usage examples for laburnum:

• The garden he remembered, and the lane beyond it, but I think the only things he found quite as he expected to find them, were the laburnum trees, in that lane," and on Charlie went, from one thing to another, drawn on by a question, put now and then by Graeme, or Mrs Snow, whenever he made a pause. "Janet's Love and Service" – Margaret M Robertson

• Ronald wandered through the gardens; the delicate golden laburnum blossoms fell at his feet, and he sat down beneath a large acacia. "Dora Thorne" – Charlotte M. Braeme

• Near my gate is a laburnum tree. "Waiting for Daylight" – Henry Major Tomlinson