Cyperus owanii

Boeckeler

Flora 61: 29. 1878.

IntroducedIllustrated
Synonyms: Mariscus umbilensis (Kuntze) C. B. Clarke ex S. Watson
Treatment appears in FNA Volume 23. Treatment on page 184. Mentioned on page 149, 183, 190.

Herbs, perennial, cespitose, rhizomatous. Culms roundly trigonous, 80–120 cm × 3–6 mm, glabrous. Leaves 5–12, V-shaped, 30–75 cm × 8–14 mm, septate, leathery, margins harshly scabrid. Inflorescences: spikes 1–4 per ray, loosely ovoid to broadly ellipsoid, 12–20 × 8–12 mm; rays 6–9, 3–10 (–12) cm; 2d order rays 1–4, 1–2 cm; rachis 4–12 mm; bracts 5–10, horizontal to ascending at 30°, 15–40 cm × 4–8 (–11) mm; rachilla deciduous, wings persistent, hyaline, fragile, 0.3 mm wide, covering less than 1/2 of achene. Spikelets 40–80, narrowly ellipsoid to ellipsoid, roughly quadrangular to weakly flattened, 5–8 × 1.2–1.5 mm; distal spikelet spreading or ascending; floral scales (1–) 2 (–3), ascending, brick-red, medially greenish, laterally 3–4-ribbed, medially 1–3-ribbed, green, ovate, 2.2–3.5 × 1.5–1.8 mm, apex subacute. Flowers: anthers (0.7–) 1–1.5 mm, filaments 4–4.7 mm; styles 0.5–0.9 mm; stigmas 2–3 mm. Achenes brown, ellipsoid to oblong-fusiform, 1.7–1.8 × 0.7 mm, base cuneate, apex subacute and apiculate, surfaces finely puncticulate to glabrous.


Phenology: Fruiting spring–fall.
Habitat: Disturbed, damp thickets, open woods
Elevation: 0–200 m

Distribution

V23 315-distribution-map.jpg

Introduced; Calif., s Africa

Discussion

Cyperus owanii is easily distinguished from other sedges in California by the large size, reddish spikelets, and secondary rays. It was first collected in California in 1938.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

... more about "Cyperus owanii"
0.17 cm1.7 mm <br />0.0017 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
ellipsoid;oblong-fusiform +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
subacute;subacute +
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Boeckeler +
persistent +  and deciduous +
cuneate +
w--shaped +  and keeled +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
15 cm150 mm <br />0.15 m <br /> (40 cm400 mm <br />0.4 m <br />) +
horizontal +  and ascending +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
80 cm800 mm <br />0.8 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
scabridulous +
trigonous +
3mm;6mm +
ascending +  and spreading +
Calif. +  and s Africa +
0–200 m +
0.4 cm4 mm <br />0.004 m <br /> (?) +  and 0.47 cm4.7 mm <br />0.0047 m <br /> (?) +
1-3-ribbed +  and 3-4-ribbed +
green +, greenish +  and brick-red +
deciduous +  and persistent +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
hypogynous +  and subtending +
biconvex +  and trigonous +
Disturbed, damp thickets, open woods +
subumbellate +  and capitate +
spreading +  and erect +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
30 cm300 mm <br />0.3 m <br /> (?) +  and 75 cm750 mm <br />0.75 m <br /> (?) +
v--shaped +
leathery +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
Fruiting spring–fall. +
2-3(-4)-carpellate +
antrorse +  and extrorse +
3 (?) +  and 1 (?) +
continuous +, articulate +, winged +  and wingless +
conspicuous +
10 cm100 mm <br />0.1 m <br /> (12 cm120 mm <br />0.12 m <br />) +
unequal +
1 +  and 4 +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
adventitious +
basal +  and proximal +
cylindric;compressed +
cylindric +
Introduced +  and Illustrated +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
loosely ovoid;broadly ellipsoid +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
40 +  and 80 +
narrowly ellipsoid;ellipsoid roughly quadrangular +
1.2mm;1.5mm +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2-3-fid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Mariscus umbilensis +
Cyperus owanii +
Cyperus subg. Cyperus +
species +
herb +  and cespitose +
persistent +
0 +  and 1/2 +