This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Erect herbs or climbing shrubs with cordate entire or lobate leaves and axillary clustered or solitary pendulous flowers. Perianth tubular, curved or straight, with an oblique trilobate limb. Stamens 6; anthers adhering to the stigma. Capsule 6-valved. There are 160 species, chiefly tropical. The name is of Greek origin, founded on its reputed medicinal properties, as is also the English one, Birthwort.
1. A. Clematitis. - An erect perennial with simple stems, ovate-cordate petiolate glabrous leaves, and clustered axillary yellow flowers, produced all through the Summer. A European species, occasionally seen as a garden outcast in Britain,
2. A. Sipho (fig. 212), Dutchman's Pipe. - A hardy deciduous climbing shrub with very large glabrescent leaves and yellow and purple streaked flowers, appearing in Summer. A native of North America.
Fig. 212. Aristolochia Sipho. (1/6 nat. size.)
Asarum Europeaum is a tufted evergreen herb with radical reniform leaves and small solitary pedunculate lurid-purple flowers. Perianth regular, cainpanulate, trilobate. Stamens 12. Capsule bursting irregularly.
The Piperaceae or Pepper Order contains upwards of 500 species, but, with the exception of a Japanese species, none will flourish in the open air in this country. They are erect shrubs, or trees, or herbs with jointed stems, usually alternate simple-nerved leaves, and spicate inconspicuous flowers and 1-seeded berries.