1. Impatiens glandulifera Royle and Heracleum mantegazzianum Sommier et Levier are widespread, non-indigenous plant species in the UK. A variety of correlational analyses suggest that their spatial ...
It may look harmless, but exposure to the giant hogweed plant, or Heracleum mantegazzianum, can cause blindness and blistering of the skin. Wikipedia Commons The “giant hogweed” plant may look ...
Diversity and Distributions, Vol. 13, No. 1 (Jan., 2007), pp. 99-114 (16 pages) Several species of the genus Heracleum (Umbelliferae) were introduced into Europe from south-west Asia in the 19th ...
This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...
Cow parsnip (Heracleum maximum) is the only member of the hogweeds that is native to North America. Like other hogweeds, cow parsnip sap can cause blisters and phytophotodermatitis. There is currently ...
RECENTLY reports have been published of microscopic particles moving along strands in the sieve tubes of cut sections of Primula obconica 1,2. This movement has suggested that protoplasmic streaming ...
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