Search Results: Hypericum

Hypericum hirsutum - Hairy St John's-wort

Two British species of Hypericum have hairs on both upper and lower sides of the leaf; Marsh St John’s-wort which has runners and is found in bogs, and Hairy St John’s-wort which has an erect stem and black dots along the margin of its sepals. Being a medium to tall grassland perennial with a rounded stem Hairy St John’s-wort can be mistaken for Perforate St John’s-wort but, as the name suggests, it is hairy and the oblong leaves are much longer. It flowers from July to August with seed shed from September onwards. The plant normally dies back in winter but may persist in particularly sheltered sites.

Hypericum perforatum - Perforate St John's Wort

Perforate St John’s-wort or Common St John’s-wort as it is also known is a medium tall, hairless grassland perennial. In common with most species of St John’s-wort it has golden yellow flowers with black dots along the edge of the petals. The leaves when held up to the light show many translucent dots hence the common name of perforate St John’s-wort.

Hypericum tetrapterum - Square-stalked St John's Wort

The distinguishing feature of this St John’s-wort is a stout stem with four winged ridges running along its length, hence the common name of square-stalked St John’s-wort, and the more accurate Latin name of Hypericum tetrapterum. Unlike most common St John’s-worts black dots are rare on the leaves and flowers. The pale yellow flowers are out from July to September.

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