It is a fossilized stone primarily containing silicate of lime. It is used as a diuretic and lithontriptic. It is prescribed in the retention of urine and in diseases of the urinary organs. It has a useful application as a dusting powder in vesicular eruptions in children, for itching, ringworm and other skin diseases.

It is a perennial errect rhizomatous herb with galbrous leaves and white flowers which are borne in dense terminal spikes. The rhizomes are aromatic with bitter camphorous taste. It is reproted for its anti-microbial properties and used traditionally as one of the ingredient in herbal vanising creams to protect the skin from sun's UV rays.

It is an annual herb cultivated throughout India for its oily seeds. The herb is long reaches up to 15 m in high and the flower heads are bigger measures 30-60 cm across. The achenes are cylindrical and compressed. Oil has soothing properties.

A slender, laticiferous, twining, sometimes prostrate or semi-erect shrub, the roots of which constitute the Indian sarsaparilla.

The air-dried roots yield essential oil containing p -methoxy salicylic aldehyde as the major constituent. The drug has long enjoyed a reputation as a tonic, alterative, demulcent, diaphoretic, diuretic and blood purifier. It is employed in nutritional disorders, syphilis, gonorrhea, chronic rheumatism, gravel and other urinary diseases and skin affections.

Holarrhena antidysenterica is a deciduous laticiferous shrub or a small tree.

Its principal constituent is the alkaloid of kurchi which is conessine. The other alkaloids reported to be present in the bark are: conamine, conkurchine, connessimine, kurchine, conarrhinine, holarrhinene, and isoconcessimine. The bark has astringent, antidysenteric, anthelmintic, stomachic, febrifugal and tonic properties. It is used in the treatment of amebic dysentery and diarrhea.

Hygrophilia auriculata is a robust, erect, annual herb, with sub-quadrangular stem, thickened at nodes and yellow spines in leaf axis.

It is used in disorders of the genitourinary system and is helpful in the cases of impotence, spermatorrhea and seminal debilities.

An erect, viscidly hairy, fetid annual or biennial.

The dried leaves and flowering tops constitute the drug Henbane (Hyoscyamus, Hyoscyami herba). Henbane is valued principally for the alkaloids present in most parts of the plant, particularly in the leaves and flowering tops. Besides the alkaloids, it contains volatile base similar to those present in belladonna leaf, a bitter glycoside hyoscypicrin, choline, mucilage and albumin; it is rich in potassium salts.

Hyoscyamus has anodyne, narcotic, mydriatic and anti-inflammatory properties. It is principally employed as a sedative in nervous affections. Hyoscyamus leaves have been employed externally to relieve pain.

An aromatic, shrubby perennial which yields a volatile oil.

Hyssop is considered stimulant, carminative and pectoral; the oil promotes expectoration in bronchial catarrh and asthma.