Culms and leaves with non-kranz anatomy (C3). Inflorescences: spikes; rachilla persistent, wingless. Spikelets borne in digitate clusters (rarely singly) or in umbellate or glomerulate heads; floral scales deciduous, 2-keeled or folded (conduplicate). Flowers: stamens 1–3; stigmas 3. Achenes trigonous, planoconvex, or terete.

Discussion

Species ca. 150 (22 in the flora).

The greatest species diversity of Cyperus subg. Pycnostachys is found in the lowland forests of Central America, South America, Africa, and Malesia.

Selected References

None.

"shortened" is not a number.

terete;planoconvex;terete;planoconvex;trigonous +
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
C. B. Clarke in J. D. Hooker +
persistent +  and deciduous +
decurrent +
w--shaped +  and keeled +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
parallel +  and divergent +
terete +, rolled +  and plicate +
scabridulous +
round +  and trigonous +
Worldwide +
folded +  and 2-keeled +
hypogynous +  and subtending +
biconvex +  and trigonous +
digitate +, glomerulate +  and umbellate +
subumbellate +  and capitate +
spreading +  and erect +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
with (1-)3-6(-30) bristles and/or scales +
2-3(-4)-carpellate +
antrorse +  and extrorse +
3 (?) +  and 1 (?) +
in J. D. Hooker, Fl. Brit. India +
unequal +
adventitious +
basal +  and proximal +
cylindric;compressed +
cylindric +
1 +  and 150 +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
2-3-fid +
Cyperus subg. Protocyperus +
Cyperus subg. Pycnostachys +
subgenus +
tuberous +, stoloniferous +  and rhizomatous +
annual +  and perennial +
herb +, not +  and cespitose +