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Thursday, June 25, 2009

Plant of the Day - Aconitum (Common Monkshood)

Aconitum
From Wikipedia, the free encyclopedia

Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Ranunculales
Family: Ranunculaceae
Genus: Aconitum L., 1753
Species: See below

Aconitum (pronounced /ˌækəˈnaɪtəm/ A-co-ní-tum[1]), known as aconite, monkshood, wolfsbane, leopard's bane, women's bane, Devil's helmet or blue rocket,[2] is a genus of flowering plant belonging to the buttercup family (Ranunculaceae). There are over 250 species of Aconitum.


These herbaceous perennial plants are chiefly natives of the mountainous parts of the northern hemisphere, growing in moisture retentive but well draining soils on mountain meadows. Their dark green leaves lack stipules. They are palmate or deeply palmately lobed with 5–7 segments. Each segment again is 3-lobed with coarse sharp teeth. The leaves have a spiral or alternate arrangement. The lower leaves have long petioles.

These are handsome plants, the tall, erect stem being crowned by racemes of large and eye-catching blue, purple, white, yellow or pink zygomorphic flowers with numerous stamens. They are distinguishable by having one of the five petaloid sepals (the posterior one), called the galea, in the form of a cylindrical helmet; hence the English name monkshood. There are 2–10 petals, in the form of nectaries. The two upper petals are large. They are placed under the hood of the calyx and are supported on long stalks. They have a hollow spur at their apex, containing the nectar. The other petals are small and scale like or non forming. The 3–5 carpels are partially fused at the base.

The fruit is a follicle. A Follicle being a dry, unilocular, many-seeded, fruit formed from one carpel and dehiscing by the ventral suture in order to release seeds.




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