Bidens polylepis Blake
Ozark beggarticks, long-bracted tickseed sunflower
Ozark beggarticks, long-bracted tickseed sunflower
October 7,
Mount Holyoke Range State Park, Amherst
Ripe cypsela.
"Cypselae blackish or brown to yellowish, ± flattened, obovate or oblanceolate to cuneate, outer 5–7 mm, inner 7–8 mm (lengths mostly 1.5–2.5 widths), margins (± corky-winged) antrorsely barbed or ciliate, apices ± truncate, faces glabrous or strigillose, sometimes tuberculate"--Flora of North America
"Cypselae blackish or brown to yellowish, ± flattened, obovate or oblanceolate to cuneate, outer 5–7 mm, inner 7–8 mm (lengths mostly 1.5–2.5 widths), margins (± corky-winged) antrorsely barbed or ciliate, apices ± truncate, faces glabrous or strigillose, sometimes tuberculate"--Flora of North America