Tuesday, December 27, 2011

Plants that have silicon hairs

 Plants that have silicon hairs aka plants that Sting you.
 
  Stinging nettles (Urtica dioica) produce stinging cells shaped like hypodermic needles that break off when disturbed and inject highly irritating toxins into herbivore tissues. Some stinging cells contain prostaglandins, hormones that amplify pain receptors in vertebrate animals and increase the sensation of pain.

Grasses and sedges contain rows of silica cells in their epidermal layers which give strength and rigidity to the growing leaf blades and deter feeding by chewing insects. 
Seems there are many plants that have some mean defenses. 
Here are a few to be careful of touching .

Nettle family  , there are several kinds!
[URTICA] Nettles


 (Urtica DioicaStinging Nettle. has silicon hairs (trichomes) this nettle has the worst sting but the other 2 listed sting also.
click pictures for larger images
 Small Nettle (Urtica Urens)


 Fen Nettle (Urtica Galeopsifolia)




 A note from experience :>{  Stinging nettle is instant Pain , Jewel weed often grows near and it's juices can relieve the pain. If you don't see it find MUD asap and cover the area .
Jewelweed also good for poison ivy too