Image from the Biodiversity Heritage Library.
Contributed by Smithsonian Institution Archives.
| www.biodiversitylibrary.org
Transcription
bristles, achene without a tubercle or enlarged style base
........... Cyperus
EB. Scales of spikelet spirally arranged, achene not crowned by
the persistent bulbous base of the style, no inner scales sub-
tending the flowers, style dilated at the base, no perianth ..
........... FimbristyIis
EBB. as above but style terete, not dilate at base, perianth of
1-8 bristles or none ..........
Scirpus