Family Droseraceae Salisbury 1808 nom conserv the Sundew Family

Physical description: The family Droseraceae consists of 4 genera and about 100 species of discrete perennial herbs forming rosettes of leaves, which are often circinate in buds and usually covered with sticky stipitate glands or marginal bristles which entrap insects. Naphthoquinones and flavonoids are known to occur in this family. The inflorescences are simple and circinate cymes of bisexual flowers. The calyx comprises of 4-5 sepals which are imbricate and persistent. The corolla consists of 5 petals which are hypogy-nous and free. The anthers are 2-locular, extrorse, and open by longitudinal slits. The gynecium consists of 3-5 carpels united to form a compound and unilocular ovary containing 3 to numerous anatropous ovules attached to central or parietal placentas. The fruits are loculicidal capsules containing several spindle-shaped seeds.

Pharmaceutical interest: A classical example of Droser- O

aceae is Dionaea muscipula (Venus's flytrap), which has attracted a great deal of interest on account of its leaves which entrap insects. Traditionally used in Europe to treat spasms, soothe and calm cough were Drosera rotundifo-lia L., Drosera anglica Huds. (Drosera longifolia L.) and Drosera intermedia Hayne (sundews, red roots). The air-dried entire Drosera rotundifolia (Drosera, French Pharmacopoeia, 1965) has been used to treat chronic bronchitis, asthma, and whooping cough, usually as tincture (1 in 5; dose 0.5 mL-2 mL). D naphthoquinones including plumbagin and droserone, which are irritating and antibacterial against a broad spectrum of Gram-positive and Gramnegative organisms, fungi and protozoa (Leishmania, Plasmodium). Drosera burmannii Vahl, Drosera rotundifolia L., Drosera indica L., and Drosera peltata Sm. are of medicinal value in Southeast Asia. Not much is yet known about the pharmacological potential of the family Droseraceae.

OH O

Droserone ch3

OH O

Droserone

Continue reading here: Drosera burmannii Vahl

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