References:

in this one you have a photo and quite good information regarding the herb:
(This is PennyRoyal Herb, cut, 2oz. Info and useage below: Biological Name: Labiatae Mentha pulegium, Hedeoma pulegioides Other Names: Pennyroyal, American Pennyroyal, European Pennyroyal, tickweed, sqaw mint, stinking balm, thickweed, mock pennyroyal, mosquito plant, squaw balm Parts Used: Aerial parts,oil ActiveCompounds: o Volatile oil, consisting mainly of pulegone, isopulegone, menthol, isomenthone, limonene, piperitone, neomenthol. o Miscellaneous; bitters and tannins. History: Remedies For: Carminative, diaphoretic, stimulant, emmenagogue.)

PENNYROYAL HERB c/s.....(Mentha pulegium) - Adrianne's Herbal ...
... PENNYROYAL HERB c/s.....Mentha pulegium). Product
Details, Stock #: pennyroyal-433. ...
herbalmagik.safeshopper.com/1/433.htm?227

PennyRoyal Herb, cut, 2oz
... This is PennyRoyal Herb, cut, 2oz. Info and useage below: Biological Name: Labiatae
Mentha pulegium, Hedeoma pulegioides Other Names: Pennyroyal, American ...
www.capricornslair.com/penhercut2oz.html

Pennyroyal, fresh medicinal herb extracts
... Pennyroyal Mentha pulegium Part Used: Herb. Pennyroyal is valued for its anti-spasmodic
properties for delayed or painful menstruation with muscle cramp ...
www.teetercreekherbs.com/single/pennyroyal.html

and plenty more at:
http://www.google.com/search?q=pennyroyal herb mentha&hq=&hl...