Weed
slender Russian thistle, tumbleweed
True seedTrue seed:
A mature fertilized ovule consisting of an embryo, with or without and external food reserve (e.g., endosperm) enclosed by the testa.
Conical, laterally displaced and somewhat compressed
Grayish to brown
PericarpPericarp:
Fruit wall; derived from the ovary wall.
is semi-glossy. Sepals are dull.
Seed coatSeed coat:
The protective covering of a seed usually composed of the inner and outer integuments. Also called the testa.
, pericarpPericarp:
Fruit wall; derived from the ovary wall., and sepals have membranous extensions.
Seed unitSeed unit:
The structure usually regarded as a seed in planting practices and in commercial channels, consisting of a true seed with or without accessory structures, as defined in Section 2.6 of the AOSA Rules. See also true seed.
can be a true seedTrue seed:
A mature fertilized ovule consisting of an embryo, with or without and external food reserve (e.g., endosperm) enclosed by the testa.
, fruitFruit:
A mature ovary and any associated parts.
or a flower. The embryoEmbryo:
A rudimentary plant contained in a seed, usually consisting of a more or less differentiated axis and attached cotyledon(s).
coil is visible through the pericarpPericarp:
Fruit wall; derived from the ovary wall. and is not exactly conical but leans to one side.
State Noxious Weed: California
Not included
Amaranthaceae
Salsola collina Pall.
