samcu gismu

x1 is a quantity of cassava/taro/manioc/tapioca/yam [edible starchy root] of species/strain x2.

See also patlu, genja, jalna.

In notes:

genja
x1 is a root [body-part] of plant/species x2; [metaphor: immobile, supporting, nourishing].
jalna
x1 is a quantity of/contains/is made of starch from source x2 of composition including x3.
patlu
x1 is a potato [an edible tuber] of variety/cultivar x2.
debysamcu
x1 is a jicama of species/variety x2.
gejystani
x1 is a rhizome/rootstalk of plant/species x2.
iamsa
x1 is a yam of species x2
konjaku
x1 is konjac of species/variety x2.
mandoka
x1 is manioc of species/variety x2.
samcrkasava
x1 is cassava of species/variety x2.
samcrtaro
x1 is taro of species/variety x2.
mandioka
x1 is manioc of species/variety x2.
samcrniame
x1 is a yam (Dioscorea) of species/variety x2.