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''P. cablin'' .
*Erect or ascending aromatic herb, up to 1 m tall. Stem branched, solid, angular, tomentose.
*Leaves decussately opposite, thin- or thick-membranaceous, with short appressed hairs; petiole 1-3(-8) cm long; blade ovate, 5-10(-14) cm × 3.5-6.5(-10) cm, base cuneate, margin simple or double crenate-serrate, apex acute, gland-dotted below.
''P. heyneanus'' .
*Erect or ascending, aromatic subshrub, up to 1.5 m tall. Stem branched, slender, solid, obtusely 4-angular, subglabrous and rooting at the base, short-haired in upper part.
*Leaves decussately opposite, thin-membranaceous, subglabrous to rather densely soft-haired; petiole 1-6 cm long; blade ovate, 1-14 cm × 1-8 cm, base cuneate, margin simple or double crenate-serrate, apex acuminate, gland-dotted below.
* Weiss, E.A., 1997. Essential oil crops. CAB International, Wallingford, United Kingdom. pp. 138-154.
== Composition of essential-oil of Patchouli oil (from Java) (''Pogostemon cablin'') ==
{{Citation box
|text =
|author =Source: Lawrence, 1990.
}}
== Physical properties of essential oil ==
'''patchouli oil (''Pogostemon cablin'')'''
*Relative density : 0.955-0.983
*Refractive index : 1.505-1.512
*Optical rotation : -66° to -40°
*Miscibility in ethanol : 1:10 (90%)
*ISO/EOA : ISO 3757 '78
See comments : [[Physical properties of essential oils (PROSEA)]]
== Sources of illustrations ==