JULY. 297 
PaPAVER SOMNIFERUM, White Poppy, is the species culti- 
vated for producing opium; it has white flowers with a 
purple eye. Scarcely found truly wild in England. It is 
supposed to have been brought originally from Asia. Opium 
is a kind of thick white fluid which flows from the stem 
and seed-vessel on being cut: this, when hardened, is known 
by the name of opium cakes. 
PoLyANDRIA. MOoONOGYNIA. 
THALAMIFLORA, PAPAVERACES. 
GLAUCIUM. (Hornep Poppy.) 
Generic Character. Calyx of two leaves, falling off. Petals 
four. Seed-vessel very long and narrow. 
Guavucium LureuM. Yellow-horned Poppy. This Poppy 
is easily distinguished from those mentioned above, not 
only by its colour, which is yellow, but by the great length 
of its pods, which are from six to twelve inches long. The 
leaves are of a greyish-green, and, as well as the stem, very 
smooth. ‘The beautiful yellow petals very soon fall off after 
the flower is gathered. It is found plentifully on sandy and 
