Glyceria aquatica (glyceria). Related species: G. striata (tall mannagrass). A member of the plant family GRAMINEAE. Perennial glabrous aquatic herb, favouring wet areas, ponds, fens and slow flowing rivers. Long, upright green leaves; flowers, which are in spikelets, are pale green with purple spots.


[affected.gif] Animals most affected
Cattle, sheep.


[etiology.gif] Etiology
Ingestion of the fresh plant (especially during drought when only marshy areas remain green).


[toxic.gif] Toxicity
Contains a cyanogenetic heteroside, dhurrine. The hydrogen cyanide (HCN) content in fresh plant material varies from 0.060.2g/kg.

Oral doses in g fresh plant per kg body weight:
LD cattle 5
  sheep 2-4


[clinical.gif] Clinical features
Clinical signs present almost immediately:
death in 1-2 minutes, preceded by a few convulsions and paddling movements of the legs.

When ingestion is occasional:

Where the quantity of plant ingested is minimal:


[lesions.gif] Lesions


[treatm~1.gif] Treatment
Almost impossible to administer as the onset of clinical effects is too rapid. The following may be attempted:


[labinv~1.gif] Laboratory investigations