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Solanum ptychanthum

Species category

Weed

Common name

West Indian nightshade

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

LenticularLenticular:
Lens-shaped, circular in outline with convex sides.
 with hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 point

Size

  • Length 1.5–1.8 mm 
  • Width 1–1.2 mm 
  • Thickness 0.4–0.6 mm 

Color

Light yellow 

Texture

Strongly reticulated 

Other structures

HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 extends beyond margin.

Identification notes

Seed very light-colored, small, and strongly reticulatedReticulated:
Resembling a net or network, especially having veins, fibers, or lines crossing the surface.  
. HilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
 extends beyond the margin.

Noxious weed seed categories

State Noxious Weed: Arizona 

AOSA examination list

Included

Nomenclature

Family

Solanaceae

Valid name

Solanum ptychanthum Dunal

Synonyms

Solanum americanum auct. non Mill.
Solanum nigrum Pauct. non L.
Solanum ptychanthum Dunal, database artifact

Solanum ptychanthum. True seeds that are very light colored and small, with a hilum that extends beyond the margin, and the seed is strongly reticulated. 
Solanum ptychanthum. True seeds that are very light colored and small, with a hilum that extends beyond the margin, and the seed is strongly reticulated.