Page:Indian Medicinal Plants (Text Part 2).djvu/270

The following table will give some idea as to the differences in the physical properties and chemical composition of the two oils :

Oil from flowers.

Oil from leaves.

Colour

Red

Yellow

Odour

Pleasant, somewhat

Very pleasant, resembl-

peppermint like.

ing lemon-grass.

Specific gravity

24*5° n-jpr 0-923

B ™1K 0-895 D 15°

Optical Rotation

Colour too deep to

allow of determination

, [o]D —0.87.°

Refractive Index

^° 1.JAQQ

28 ' 5S WRM

nD LWW "D

Solubility in 70% alcohol 1 part in 28 parts 1 part in 2 parts

Saponification value 149*5 44*25

Acetyl value 199 14r4,

Vern.—Pângla (Deccan) and Konkan also Pângla.

Habitat— Western Himalaya, from Nepal to Simla; Lower Bengal and Behar. The Concan, Canara and the Circars.

A strongly-scented, large, gregarious, shrubby, hoary, pubescent bush; branches round, often dark purple. Young parts tomentose. Leaves opposite, stalked ovate acute, doubly-toothed or serrate, long pointed, 3-6in., longer than the petiole. Panicle usually elongate ; whorls subsecured, crowded in large cylindric spikes. Floral leaves bract-like, hairy glandular, ovate acute. Flowers hardly £in. long, white tinged with, pink. Calyx hirsute, tubular 5-toothed. Calyx-teeth shortly triangular lanceolate, ciliate, nearly equal. Corolla-tube, curved, longer than the calyx. Limb spreading, 4-lobed, lobes nearly equal, obtuse. Stamens 4 nearly equal, far protruding. Filaments lilac, bearded with long, lilac, beaded hairs (Collett and J. D. Hooker).

Use. — Used like P. parviflorus. (Syn. P. purpuricaulis, Dalz.) It is the source of the phângla (see the correspondence on the subject, pp. 243-246 of Vol. I of Report Proceed Central Indigen Drugs Com.)

978. P. purpuraseens, Dalz., h.f.b.l, iv. 632.

Habitat. — Deccan and Manipur. Dr. Watt says : "It is a very striking species and has the somewhat remarkable distribution