Article from Bean's Trees and Shrubs Hardy in the British Isles
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'Olearia colensoi' from the website Trees and Shrubs Online (treesandshrubsonline.
An evergreen shrub 10 to 16 ft high. Leaves of very leathery texture, usually obovate to obovate-lanceolate, pointed or occasionally bluntish at the apex, tapering at the base to a stout stalk 1⁄2 to 3⁄4 in. long, toothed (often doubly so) at the margin, 3 to 8 in. long, half or less than half as much wide; dark shining green above except when young, clothed permanently beneath with a thick white wool; veins netted, prominent beneath. Racemes clustered at ends of the branches, each 4 to 8 in. long and bearing five to eight or more flower-heads which are up to 1 in. wide and dark brownish purple. There are no ray-florets. Salmon, New Zealand Plants and Flowers in Colour, t. 460.
Native of New Zealand, where it is regarded as one of the most handsome of the daisy bushes. It was discovered on Mt Hikurangi by Colenso at altitudes up to 5,000 ft, so hardy forms must exist. But the garden stock probably came from Stewart Island, where it forms an important part of the vegetation near the sea, and attains the dimensions of a small tree. This form is tender, and rare in the British Isles, though it flourishes at Tresco Abbey in the Isles of Scilly, where there are several plants about 15 ft high. At Kew it needs the protection of a cool greenhouse.
Synonyms
O. angustifolia × O. colensoi