Plant morphology share the same basic structure and development as leaves in other plants, and therefore cactus spines are homologous to leaves as well. This aspect of plant morphology overlaps with the study of plant evolution and paleobotany. Secondly, plant morphology observes both the vegetative (somatic) structures of plants, as well as the reproductive structures. The vegetative structures of vascular plants includes the study of the shoot system, composed of stems and leaves, as well as the root system. The reproductive structures are more varied, and are usually specific to a particular group of plants, such as flowers and seeds, fern sori,
Linum marginale close to the stem. To the untrained eye from a distance, in may appear to have no leaves. Unlike most other species of flax which have yellow flowers, Linum marginale beaks into sprays of large, electric blue flowers in spring and early summer. The flowers (around 3 cm across) have five petals and form at the top of each wiry stem of the plant. Flowers are replaced in summer by small, globular, papery capsules, about 3 mm across, containing a cluster of buff coloured, sesame-like seeds. Like many southern Australian flowers, the plant dies back in summer, but reshoots the