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Journal of the Department of Agriculture, Western Australia, Series 3

Authors

G.R W. Meadly

Keywords

Western Australia, Weeds, Cirsium lanceolatum (L.) Scop.

First Page Number

33

Last Page Number

36

Abstract

A NUMBER of thistles, including Canada, Berkheya and saffron have been dealt with in previous articles. The first two are perennials, living for an indefinite period, while saffron thistle completes its life cycle in one year. Spear thistle, the subject of this article, is intermediate, usually being a biennial. During the first year it produces a rosette of large, very spiny leaves, the flowers and seeds being formed during the second season of growth.

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