Saptaparna consists of stem bark of Alstonia scholaris (Llnn.) R. Br. (Fam. Apocynaceae), a tall evergreen tree, found in the Sub-Himalayan tracts ascending to 900 m from Jammu eastwards and western peninsula mostly in deciduous forests.
Sanskrit : Saptacchada, Saptaparni, Saptihvi
Assamese : Chatiyan
Bengali : Chatin
English : Dita
Gujrati : Saptaparna, Satvana
Hindi : Chhativan, Satawana
Kannada : Maddale, Hale, Eleyalaga
Kashmiri : Kath
Malayalam : Daivaphal, Ezilampala
Marathi : Satveen
Oriya : Chbatiana, Chatiana
Punjabi : Sathi, Satanna
Tamil : Ezilampalai
Telugu : Edakula Ponna
Urdu : —
Bark occurs in channelled or occasionally quilled pieces, 3-4mm thick from branches and cut or broken irregularly into curved or flat pieces, about 7 mm thick from stem, externally younger bark dark grey to brown, older bark very rough, uneven and much fissured transversely and longitudinally, both marked with numerous rounded or transversely elongated, grey to whitish brown lenticels, internally brownish-buff to dark greyish-brown, somewhat striated and indented, fracture, short and smooth, fractured surface shows a narrow, inner portion traversed by numerous, fine, medullary rays and a varying spongy outer portion
Transverse section of bark shows a multi-layered, thick and thin-walled cork, a broad zone of secondary cortex composed of thin-walled, parenchymatous cells, including many rounded latex cavities, scattered throughout tissue, containing numerous rhombic to polygonal calcium oxalate crystals, numerous stone cells forming a noncontinuous layer of 4-8 cells, irregular, rounded to linear, fibre-like, blunt at both ends, internal to secondary cortex a secondary phloem cells containing many sieve tubes, cork cells brick shaped to almost square in transverse and longitudinal sections and polygonal in surface view, cork cambium forms a region of two rows of cells identical to cork cells, situated in between cork and secondary cortex, secondary phloem cells smaller in dimension than cortical cells consisting of phloem parenchyma, many sieve tubes and companion cells, fibres absent.
CONSTITUENTS – Alkaloids (echitamine, ditamine and echitamidine).
PROPERTIES AND ACTION
Rasa : Tikta, Kashiya
Guna : Sara, Snigdha
Virya : Ushna
Vipaka : Katu
Karma : Anulomana, Dipana, Jvaraghna, Kushhaghna, Raktasodhaka, Tridoshaghna
IMPORTANT FORMULATIONS – Amritirisha, Aragvadhidi Kvitha Churna, Vajraka Taila.
THERAPEUTIC USES – shula, Gulma, Jvara, Krimiroga(Antihelmenthic), Kushtha, Sindrameha
DOSE – 20-30 g of the drug for decoction.