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Senna Flower or

Senna Flower or

Senna Flower

Senna includes herbs, shrubs, and trees. The leaves are pinnate with opposite paired leaflets. The inflorescences are racemes at the ends of branches or emerging from the leaf axils. The flower has five sepals and five usually yellow petals. There are ten straight stamens. The stamens may be different sizes, and some are staminodes. The fruit is a legume pod containing several seeds.Until 1982, many authors, following Linnaeus, did not recognize Senna and Chamaecrista, but included them in a broadly circumscribed Cassia sensu lato. Phylogenetic analyses of DNA have shown that Chamaecrista, Cassia, and Senna are all monophyletic, but the relationships between these three genera have not been resolved.

Senna

via GIPHY

Useful and medicinal plants, wood engravings, published in 1893 Useful and medicinal plants, top: Runner bean (Phaseolus coccineus, or Phaseolus multiflorus, a-stem, b-husk, c-blossom, d-blossom after removal of the flag and one wing, e-the same blossom seen from below, f-sliced bean; Indian shot (Canna indica); Cinchona lancifolia; Swamp ragwort (Senecio congestus, or Cineraria palustris), a-blossom, b-rhizome, c-seed. Below: Borago officinalis, a-anther and flower leaf, b-petal with flower base, c-anther (sideview) with scale; d-one of the four achenes (seed); Caladium humboldtii (or Caladium argyrites); caraway (Carum carvi); Great pignut (Bunium bulbocastanum, or Carum bulbocastanum); Mediterranean cypress (Cupressus sempervirens), a-cone, b-seed; Senna alexandrina, or Cassia lanceolata.

Useful and medicinal plants, top: Runner bean (Phaseolus coccineus, or Phaseolus multiflorus, a-stem, b-husk, c-blossom, d-blossom after removal of the flag and one wing, e-the same blossom seen from below, f-sliced bean; Indian shot (Canna indica); Cinchona lancifolia; Swamp ragwort (Senecio congestus, or Cineraria palustris), a-blossom, b-rhizome, c-seed. Below: Borago officinalis, a-anther and flower leaf, b-petal with flower base, c-anther (sideview) with scale; d-one of the four achenes (seed); Caladium humboldtii (or Caladium argyrites); caraway (Carum carvi); Great pignut (Bunium bulbocastanum, or Carum bulbocastanum); Mediterranean cypress (Cupressus sempervirens), a-cone, b-seed; Senna alexandrina, or Cassia lanceolata. Wood engravings, published in 1893. (Source: www.istockphoto.com)

 

 

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