Carex mckittrickensis

P. W. Ball

Novon 8: 221, fig. 2. 1998.

Treatment appears in FNA Volume 23. Mentioned on page 553, 554.
Revision as of 00:24, 30 July 2020 by imported>Volume Importer
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Culms 22–35 cm. Leaf-blades involute, bristlelike, to 17 cm × 0.5–1 mm. Inflorescences: proximal bract sheaths 4–10 mm; pistillate spikes 6–7 × 1.5–2.3 mm; staminate spikes 4.5–7 × 0.7–0.9 mm. Scales: pistillate scales white-hyaline or pale-brown with hyaline margins and green or brown midvein, oblongovate to broadly ovate, 2.1–3.5 × 0.9–1.4 mm, apex acute to subobtuse, slightly shorter than to about equaling perigynia; staminate scales white-hyaline, oblongovate, 3.5–6.5 × 0.8–1.8 mm, apex acute to subobtuse. Anthers 2–2.2 mm. Perigynia brown to black when fully mature, 2.2–2.9 × 0.9–1.1 (–1.2) mm; beak 0.5–0.7 mm. Achenes broadly ellipsoidobovoid, 1.6–1.9 × 0.8–1.1 mm.


Phenology: Fruiting summer.
Habitat: Seepage slope and alluvial terrace in deciduous forests
Elevation: 1800 m

Discussion

Of conservation concern.

Carex mckittrickensis is known only from McKittrick canyon in the Guadalupe mountains in western Texas; that station is over 1000 km from the nearest known locality of C. eburnea. Carex mckittrickensis is in some respects intermediate between C. eburnea and C. ussuriensis Komarov from northeastern Asia.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number."not undefined" is not a number.

... more about "Carex mckittrickensis"
0.16 cm1.6 mm <br />0.0016 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
trigonous +
0.8mm;1.1mm +
0.2 cm2 mm <br />0.002 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
2.1mm;3.5mm +
acute;subobtuse +
0.9mm;1.4mm +
Peter W. Ball +
P. W. Ball +
tapering +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
v--shaped +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
22 cm220 mm <br />0.22 m <br /> (35 cm350 mm <br />0.35 m <br />) +
1800 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Seepage slope and alluvial terrace in deciduous forests +
prophyllate +, pedunculate +  and pistillate +
0 cm0 mm <br />0 m <br /> (17 cm170 mm <br />0.17 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
subentire +
with (1-)3-6(-30) bristles and/or scales +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
brown +  and black +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
Fruiting summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
staminate +  and pistillate +
white-hyaline +, brown +, green +  and pale-brown +
basal +  and proximal +
2-keeled +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
cylindric +
staminate +  and pistillate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex mckittrickensis +
Carex sect. Albae +
species +
plant +  and cespitose +