life
cycle - native annual, reproducing by seed
stem -
upright, coarse hair, ridged, frequently spotted purplish black
growth
habit 1, growth
habit 2, growth
habit 3, stems
leaves -
alternate, ovate to triangular, wavy or irregularly toothed
margins, rough-textured above and below, long petioled leaves 1, leaves 2
flowers - greenish, small, male and female separate, two female
in oval bur; clusters, terminal and axillary
seedpods -
oval to oblong, hooked prickles, two curved spines at tip seedpods 1, seedpods 2, seedpods 3, mature seedpods
