Cyperus dipsaceus

Liebmann

Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser. 5, 2: 219. 1850.

Common names: Teasel-flatsedge
Illustrated
Synonyms: Cyperus wrightii Britton
Treatment appears in FNA Volume 23. Treatment on page 174. Mentioned on page 145.

Herbs, perennial, rhizomatous. Culms trigonous, (30–) 45–80 cm × (0.8–) 1.2–2.2 mm, glabrous. Leaves flat to V-shaped, becoming trigonous apically, 15–30 cm × 0.5–3.2 mm. Inflorescences: spikes oblong-cylindric, densely spicate, ± truncate at base, (9–) 12–22 × (4–) 6–12 mm; rays 2–4 (–5), (1.5–) 2.5–6 cm; bracts 4–6, longest erect or nearly so, larger ones flat or V-shaped, smaller capillary, trigonous, 3–24 cm × 0.4–3.6 mm; rachilla ± deciduous, wings 0.2–0.4 mm wide. Spikelets (10–) 20–60, oblong to linear-lanceoloid, compressed-quadrangular, 3–9 × 2–3.4 mm; floral scales deciduous, 2–4 (–8), spreading, medially green, laterally stramineous, dull whitish or pale reddish-brown, often red-dotted laterally, (3–) 7–9-ribbed, ovatelanceolate, (2–) 2.2–2.8 (–3) × (1–) 1.2–1.8 mm, apex acute, weakly 3-dentate, mucro 0.2–0.6 mm, with apical tuft of crystalline prickles. Flowers: anthers 0.4–0.9 mm; styles 1–1.4 mm; stigmas 1–1.6 mm. Achenes brown, ± stipitate, broadly ellipsoid, 1.4–1.5 (–1.6) × 0.8–0.9 mm, 0.1 × 0.1–0.2 mm, apex ± truncate, apiculate, surfaces papillose.


Phenology: Fruiting late summer.
Habitat: Seepage slopes in montane forests
Elevation: 1000–1500 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Cyperus dipsaceus"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
ellipsoid +
0.1mm;0.2mm +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
apiculate +, truncate +  and 3-dentate +
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Liebmann +
shortened +
persistent +  and deciduous +
decurrent +
w--shaped +  and keeled +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
3 cm30 mm <br />0.03 m <br /> (24 cm240 mm <br />0.24 m <br />) +
nearly +  and erect +
trigonous +, capillary +, v--shaped +  and flat +
smaller +  and larger +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
Teasel-flatsedge +
30 cm300 mm <br />0.3 m <br /> (45 cm450 mm <br />0.45 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
45 cm450 mm <br />0.45 m <br /> (80 cm800 mm <br />0.8 m <br />) +
scabridulous +
trigonous +
1.2mm;2.2mm +
Ariz. +, N.Mex. +  and Mexico +
1000–1500 m +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
red-dotted +, pale reddish-brown +, whitish +, dull +, stramineous +  and green +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
ovatelanceolate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
hypogynous +  and subtending +
biconvex +  and trigonous +
Seepage slopes in montane forests +
subumbellate +  and capitate +
spreading +  and erect +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
15cm +  and 30cm +
trigonous +, flat +  and v-shaped +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
Fruiting late summer. +
2-3(-4)-carpellate +
antrorse +  and extrorse +
3 (?) +  and 1 (?) +
Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser. +
continuous +, articulate +, winged +  and wingless +
conspicuous +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
unequal +
2 +  and 4 +
2.5 cm25 mm <br />0.025 m <br /> (6 cm60 mm <br />0.06 m <br />) +
adventitious +
basal +  and proximal +
cylindric;compressed +
cylindric +
Illustrated +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
oblong-cylindric +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
20 +  and 60 +
compressed-quadrangular;oblong;linear-lanceoloid +
2mm;3.4mm +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.1 cm1 mm <br />0.001 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
2-3-fid +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
papillose +
Cyperus wrightii +
Cyperus dipsaceus +
Cyperus subg. Cyperus +
species +
0.2mm +  and 0.4mm +