ITP Logo

Sida spinosa

Species category

Weed

Common name

prickly fanpetals, prickly sida, false mallow, Indian mallow, prickly mallow

Diagnostic characters

Planting unit

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.

Shape

ObovateObovate:
Inverted egg shaped with apical end the broadest.
 with two flat sides

Size

  • Length 1.8–2 mm
  • Width 1.5–1.7 mm
  • Thickness 1.5–1.7 mm

Color

Brown

Texture

Smooth

Other structures

HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 is between two very unequal lobes; carpelCarpel:
One section of a compound ovary.
 walls present.

Identification notes

Seed is laterally wedge-shaped. The radical lobe is long, narrow, and situated at the ridge made by the confluence of the two flat surfaces. The carpelCarpel:
One section of a compound ovary.
 wall has a spine on either side of the opening over the seed hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
.

Noxious weed seed categories

Not listed

AOSA examination list

Included

Nomenclature

Family

Malvaceae

Valid name

Sida spinosa L.

Synonyms

Sida alba L.
Sida angustifolia auct. non Lam. p.p.
Sida spinosa L. var. angustifolia auct. non (Lam.) Griseb. p.p.

Sida spinosa. True seeds with a spine on the carpel wall on either side of the opening over the seed hilum. 
Sida spinosa. True seeds with a spine on the carpel wall on either side of the opening over the seed hilum.