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

Oblanceolate

Size

• Length 2–2.8 mm 
• Width 0.4–0.7 mm 
• Thickness 0.4–0.7 mm 

Color

Gray, brown, and black mottled

Texture

AppressedAppressed:
Pressed close or lying flat against something.
short hairs

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. 
composed of triangular, papery scales.

Family

Asteraceae

Valid name

Lasthenia californica DC. ex Lindl.