Webb's An Irish Flora by Parnell John;Curtis Tom;Cullen Elaine;

Author:Parnell, John;Curtis, Tom;Cullen, Elaine;
Language: eng
Format: epub
Tags: Webb’s An Irish Flora
ISBN: 1621266
Publisher: Cork University Press
Published: 2012-03-07T00:00:00+00:00

72. LINACEAE

Annual or biennial herbs. Leaves undivided, entire, without stipules. Flowers in cymes, hermaphrodite. Sepals 4 or 5; petals as many, free; stamens as many, united at the base; ovary superior. Fruit a more or less spherical capsule.

1. Sepals and petals 5; petals 4–10 mm

1. Linum

Sepals and petals 4

2. Radiola

1. Linum

Sepals and petals 5. Seeds flat.

1. Leaves opposite; petals white

1. L. catharticum

Leaves alternate; petals blue

2. L. bienne

1. Linum catharticum. Fairy flax. 6–9. A delicate annual, with very slender, erect stems up to 15 cm high, usually forked above. Leaves 5–10 mm, narrowly oval, opposite. Flowers 6–8 mm across. Sepals narrow, acute; petals 4 mm × 2 mm, white. Usually in dry, short, base-rich grassland, but also in bogs, fens or heaths; abundant.

2. L. bienne. 6–8. Biennial, with erect, sparingly branched stems up to 60 cm high. Leaves alternate, linear-oblong, acute. Flowers 15–20 mm across. Sepals broad, mucronate. Petals pale blue. Dry banks and pastures in the south-east and in the south-west; occasional.

*L. usitatissimum (Cultivated flax) was formerly cultivated for linen, especially in the north-east, and occurs rarely as a casual. It is like L. bienne but has broader leaves and larger, bright blue flowers.

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