Carex subspathacea

Wormskjold in G. C. Oeder et al.

in G. C. Oeder et al., Fl. Dan. 9(26): 4, plate 1530. 1816.

Common names: Carex subspathacé
Illustrated
Synonyms: Carex hoppneri Boott Carex salina var. subspathacea (Wormskjold) Tuckerman
Treatment appears in FNA Volume 23. Treatment on page 382. Mentioned on page 380, 383, 385, 394.

Plants not cespitose. Culms obtusely angled, 3–15 cm, glabrous. Leaves: basal sheaths brown; sheaths of proximal leaves glabrous, fronts lacking spots and veins, apex U-shaped; blades epistomic, strongly involute, 1–2 mm wide, adaxially papillose. Proximal bract longer than inflorescence, 1–3 mm wide, spathelike at base and enclosing spike. Spikes erect; staminate 1 (–2); pistillate 1–3; proximal pistillate spike 0.5–1.4 cm × 2–4 mm, base cuneate. Pistillate scales bright brown to dark purple-brown, 2–3.6 × 0.9–1.5 mm, wider than perigynia, midvein reaching apex, 1/5–1/2 the width of scale, apex acute, rarely acuminate, mucronate to short-aristate. Perigynia ascending, pale-brown, sometimes with purple-brown spots on apical 1/2, veinless, somewhat inflated, loosely enclosing achenes, narrowly ellipsoid to narrowly ovoid, 2.7–3.3 (–3.6) × 1–1.8 mm, leathery, dull, base with stipe to 0.3 mm, apex acute, short-papillose; beak widely conic, 0.1–0.3 × 0.3–0.5 mm. Achenes entire to slightly constricted on margins, apex truncate to retuse, dull; style base straight, rarely bent. 2n = 78, 80–83.


Phenology: Fruiting Jun–Aug.
Habitat: Saline shores, salt marshes, mainly on small pool margins, rarely on open tundra
Elevation: 0–300 m

Distribution

V23 674-distribution-map.jpg

Greenland, Man., Nfld. and Labr., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, Eurasia

Discussion

Carex subspathacea is evidently, with C. rufina, the smallest species of sect. Phacocystis. Larger plants with one to two staminate spikes and some bisexual spikes frequently occur in Ungava Bay, Hudson Bay, Northwest Territories, and Alaska, but their perigynium and achene characteristics are typical of C. subspathacea.

The following hybrids have been examined and are recognized: Carex ×flavicans F. Nylander (= C. subspathacea × C. aquatilis), C. ×arctophila F. Nylander (= C. subspathacea × C. bigelowii), C. ×subreducta E. Lepage, (= C. subspathacea × C. bigelowii), C. ×reducta S. Drejer (= C. subspathacea × C. nigra), C. ×dumanii E. Lepage (= C. subspathacea × C. paleacea), C. ×kenaica E. Lepage (= C. subspathacea × C. ramenskii), C. ×soerensenii E. Lepage (= C. subspathacea × C. rariflora), C. ×gauthieri E. Lepage (= C. subspathacea × C. recta), C. ×persalina E. Lepage (= C. subspathacea × C. salina).

Selected References

None.

Lower Taxa

None.
... more about "Carex subspathacea"
biconvex +
constricted +
short-papillose +
purple-brown spots +
Lisa A. Standley +, Jacques Cayouette +  and Leo Bruederle +
Wormskjold in G. C. Oeder et al. +
shortened +
not +  and fibrous +
cuneate +
0.1mm;0.3mm +
bidentate +  and emarginate +
0.3mm;0.5mm +
papillose +
m--shaped +  and v--shaped +
1mm;2mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex subspathacé +
redbrown +  and brown +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
prophyllate +, subsessile +, pedunculate +  and staminate +
Greenland +, Man. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +  and Eurasia +
0–300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Saline shores, salt marshes, mainly on small pool margins, rarely on open tundra +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Fruiting Jun–Aug. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
short-sheathing +, sheathless +  and leaflike +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
in G. C. Oeder et al., Fl. Dan. +
adventitious +
bright brown +  and dark purple-brown +
0.2 cm2 mm <br />0.002 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
basal +  and proximal +
2-keeled +
wider;0.9mm;1.5mm +
ladder-fibrillose +  and veined +
cylindric +
Illustrated +
pistillate +  and staminate +
0.5 cm5 mm <br />0.005 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0 cm0 mm <br />0 m <br /> (?) +  and 0.03 cm0.3 mm <br />3.0e-4 m <br /> (?) +
deciduous +
2-3(-4)-fid +
Carex hoppneri +  and Carex salina var. subspathacea +
Carex subspathacea +
Carex sect. Phacocystis +
species +
, +  and staminate +
plant +  and not cespitose +