Xanthisma texanum

Species category

Agricultural, Weed

Common name

Texas sleepydaisy

Diagnostic characters

Planting unit

AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.

Shape

Obovate 

Size

  • Length 1.3–1.8 mm 
  • Width 0.9–1.1 mm 
  • Thickness 0.7–0.9 mm 

Color

Gray 

Texture

Striate 

Other structures

PappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
scales are long and triangular.

Identification notes

BasalBasal:
The base of the fruit or seed opposite the apical end.
end has a ring above the attachment area. The measurements exclude the pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Xanthisma texanum DC.

 Xanthisma texanum.  Achenes with long, triangular pappus scales.
Xanthisma texanum. Achenes with long, triangular pappus scales.