100 
PLANT MORPHOLOGY. 
situated above the hypocotyl, but in the Cruciferae, 
either their edges lie against the hypocotyl, as in the 
mustards, when they are said to be accumbent or condu- 
plicate, or they lie so that the back of one is against 
the hypocotyl, as in Lepidium, which position is known 
as incumbent. 
The embryo consists chiefly of parenchyma cells with 
a few fibrovascular bundles ; the cotyledons may be 
thin and leafdike, as in ricinus and nux vomica, or 
thick and fleshy, as in almond and cola ; the hypocotyl 
is usually small, but in the Umbelliferae it is as large 
as the cotyledons. 
