Mixed-nut Comb Bur
Pectocarya heterocarpa
15 km south of Aguila, Maricopa Co., Arizona, March 19, 2017.
Sponsored Links:
SPRING ANNUAL: Ephemeral spring annual appearing in the Sonoran Desert
late Jan. to early April depending on moisture.
FLOWERS: Minute, five-petaled, white flowers in small clusters.
FRUIT: Four slightly curved and spreading nutlets of two or more distinct shapes.
LEAVES: Linear and grass-like with numerous appressed hairs.
STEMS: Entirely herbaceous and ephemeral usu. less than
10 cm tall.
RANGE: Less common than the other comb bur species, but found across
the Sonoran Desert on rocky slopes and flats in similar situations.