Cascara Picture from Wikimedia Commons
Common Name: Cascara Sagrada.
Known Hazards: There is the suggestion that this species could be mildly poisonous.
Habitats: Rich bottom lands and sides of canyons, usually in coniferous forests.
Range: Western N. America – British Columbia to California.
Physical Characteristics . . . → Read More: Cascara
Oak Photo by Jorchr http://commons.wikimedia.org/wiki/File:Svaneholm,_ek.jpg
Common Name: Pedunculate Oak.
Habitats: Often the dominant woodland tree, especially on clay soils and in the eastern half of Britain, but avoiding acid peat and shallow limestone soils.
Range: Europe, including Britain, from Scandanavia south and east to Spain, the . . . → Read More: Oak
Wild Cherry Bark Photo from http://commons.wikimedia.org/wiki/File:Amerikaanse_vogelkers_bessen_Prunus_serotina.jpg
Common Name: Wild Cherry, Rum Cherry.
Known Hazards: The seeds and leaves of this species contain high quantities of hydrogen cyanide, a poison that gives almonds their characteristic flavour. This toxin is readily detected by its bitter taste. Usually present . . . → Read More: Wild Cherry
Purslane Photo by http://commons.wikimedia.org/wiki/File:Portulaca_oleracea_stems.jpg
Common Name: Green Purslane.
Habitats: Fields, waste ground, roadside verges, cultivated ground and by the sea.
Range: S. Europe. A not infrequent casual in Britain.
Portulaca oleracea is an ANNUAL growing to 0.3 m (1ft) by 0.3 m . . . → Read More: Purslane
Common Name: Yuan Zhi.
Known Hazards: Although no specific mention has been seen for this species, at least one member of this genus is said to be poisonous in large quantities.
Habitats: Hillsides, roadsides and meadows. Dry meadows and stony slopes.
Range: E. Asia . . . → Read More: Polygala Tenuifolia
Senega drawing from Wikimedia Commons
Common Name: Senega Snake Root.
Known Hazards: The plant is poisonous in large quantities, causing violent purging and vomiting.
Habitats: Rocky hills and woods on dry and mainly calcareous soils.
Range: Eastern N. America – New Brunswick to Hudson . . . → Read More: Senega