Cyperus hypopitys

G. C. Tucker

Syst. Bot. Monogr. 43: 129, fig. 54. 1994.

Common names: Pinewoods sedge
Treatment appears in FNA Volume 23. Treatment on page 178. Mentioned on page 146.

Herbs, perennial, rhizomatous, tending to form small clumps by basal offshoots. Culms triquetrous, bulbous, thickened, (20–) 30–80 (–90) cm × 0.7–1.2 mm, glabrous proximally, becoming trigonous strongly scabridulous on distal angles, clothed with persistent reddish fibers at base. Leaves flat to V-shaped, 20–45 cm × 2–4 mm. Inflorescences: spike 1, loosely ovoid to ovoid-ellipsoid, (1.5–) 2.5–7 × (1–) 1.5–3.5 cm; rays (1–) 2–4, to 6 cm; 2d order rays rarely present, to 2 cm; 3d order rays absent; bracts (2–) 3, ± horizontal, 1–15 (–21) cm × 0.4–3.5 mm; rachilla deciduous, wings hyaline, 0.3–0.4 mm wide. Spikelets (3–) 8–26, reddish to reddish-brown, linear, compressed-quadrangular, 8–18 × (2.4–) 2.8–4 mm; floral scales deciduous, 6–16, laterally reddish, medially green, occasionally red-glandular, laterally strongly 3 (–4) -ribbed, medially punctate, 1–3-ribbed, ovatelanceolate, (2.6–) 2.8–3.3 × (1.4–) 1.6–1.8 (–2) mm, apex weakly 3-dentate, mucronulate, with tuft of crystalline prickles, medially glabrous. Flowers: anthers 0.8–1.1 mm; styles 1–1.4 mm; stigmas 1–1.4 mm. Achenes brownish, stipitate, ellipsoid, 1.6–2 × (0.7–) 0.9–1 mm, base whitish, stipe to 0.1–0.2 mm, apex obtuse, slightly apiculate, surfaces papillose.


Phenology: Fruiting late summer–early fall.
Habitat: Canyons in pine forests
Elevation: 500–1500 m

Distribution

V23 300-distribution-map.jpg

Ariz., Mexico (Chihuahua), Mexico (Durango), Mexico (Sinaloa), Mexico (Sonora)

Discussion

Of conservation concern.

Cyperus hypopitys can be recognized by the combination of reddish floral scales and sharp-angled culms.

Selected References

None.

Lower Taxa

None.
... more about "Cyperus hypopitys"
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
ellipsoid +
0.9mm;1mm +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
apiculate +  and 3-dentate +
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
G. C. Tucker +
shortened +
whitish +  and reddish +
persistent +
decurrent +
w--shaped +  and keeled +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
15 cm150 mm <br />0.15 m <br /> (21 cm210 mm <br />0.21 m <br />) +
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
Pinewoods sedge +
80 cm800 mm <br />0.8 m <br /> (90 cm900 mm <br />0.9 m <br />) +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
scabridulous +
trigonous +  and triquetrous +
0.7mm;1.2mm +
Ariz. +, Mexico (Chihuahua) +, Mexico (Durango) +, Mexico (Sinaloa) +  and Mexico (Sonora) +
500–1500 m +
persistent +
1-3-ribbed +  and 3(-4)-ribbed +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
green +  and reddish +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
ovatelanceolate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
hypogynous +  and subtending +
biconvex +  and trigonous +
Canyons in pine forests +
subumbellate +  and capitate +
spreading +  and erect +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
20cm +  and 45cm +
flat +  and v-shaped +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
Fruiting late summer–early fall. +
2-3(-4)-carpellate +
antrorse +  and extrorse +
3 (?) +  and 1 (?) +
Syst. Bot. Monogr. +
continuous +, articulate +, winged +  and wingless +
conspicuous +
unequal +
2 +  and 4 +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
adventitious +
basal +  and proximal +
cylindric;compressed +
cylindric +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (7 cm70 mm <br />0.07 m <br />) +
loosely ovoid;ovoid-ellipsoid +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
reddish +  and reddish-brown +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
8 +  and 26 +
compressed-quadrangular +
2.8mm;4mm +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +  and 0.02 cm0.2 mm <br />2.0e-4 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 +
Undefined subg. Chlorocyperus +, Cyperus subg. Mariscus +  and Undefined subg. Papyrus +
Cyperus hypopitys +
Cyperus subg. Cyperus +
species +
0.3mm +  and 0.4mm +