Cyperaceae taxon details
Carex angustispica Reznicek & S.González
1677194 (urn:lsid:marinespecies.org:taxname:1677194)
accepted
Species
terrestrial
Reznicek, A. A.; González-Elizondo, M. S. (2001). <i>Carex</i> section <i>Porocystis</i> (Cyperaceae) in Mexico and Central America. <em>Contributions From The University of Michigan Herbarium.</em> 23: 339-348., available online at https://www.biodiversitylibrary.org/page/12698671#page/347/mode/1up
page(s): 346 [details]
page(s): 346 [details]
Holotype MICH 1210074, geounit Oaxaca
Holotype MICH 1210074, geounit Oaxaca [details]
Description Densely cespitose from hard rhizomes rarely more than 0.5 cm long between shoots, usually scattered in small clumps;...
Description Densely cespitose from hard rhizomes rarely more than 0.5 cm long between shoots, usually scattered in small clumps; fertile culms (3—) 10-65 cm long, erect, stiff, trigonous, 0.4-1.2 mm wide ca. 1 cm below the inflorescence, the angles acute, smooth to minutely scabrous; bladeless basal sheaths reddish purple-tinged, spikes pistillate, ovoid to cylindrical, 4-14.5 mm long, 3-4.8 mm wide, with ca. 5— 40 perigynia. Pistillate scales 1.6-2.4 (-2.6) mm long, 1.3-1.7 mm wide, ca. 1.2-1.6 times as long as wide, ovate to broadly ovate, wider and shorter than the perigynia, obtuse to acute, sometimes minutely cuspidate, glabrous, stramineous hyaline to brownish with a green or pale brown 3-nerved center and narrow hyaline margins, the center smooth or sparsely and minutely scabrous; staminate scales 2.8-3.3 mm long, 1.3-1.9 mm wide, ca. 1.7—2.2 times as long as wide, ovate, acute to acuminate, stramineous to brownish with a green or pale brown 3-5-nerved center and narrow hyaline margins. Perigynia 2.1-2.8 mm long, 1.2-1.5 mm wide, widest at 1.1-1.4 mm below apex, ascending, flattened-trigonous, ovoid to obovoid, glabrous, firm-membranous, not inflated, green to brown, 2-ribbed with ca. 9-14 weak nerves that are inconspicuous at full maturity, the perigynia tapering to the base and to the apex, beakless, with a nearly entire, inconspicuous orifice. Achenes 1.4-1.8 mm long, 1.1-1.3 mm wide, flattened-trigonous, obovoid, yellowish to brown, puncticulate, sessile to short-pedicellate, bent-apiculate. Style withering; stigmas 3. Anthers 3, ca. 1.3-1.7 mm long.
[details]
[details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex angustispica Reznicek & S.González. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1677194 on 2025-09-13
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2024-12-10 11:47:54Z
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Nomenclature
original description
Reznicek, A. A.; González-Elizondo, M. S. (2001). <i>Carex</i> section <i>Porocystis</i> (Cyperaceae) in Mexico and Central America. <em>Contributions From The University of Michigan Herbarium.</em> 23: 339-348., available online at https://www.biodiversitylibrary.org/page/12698671#page/347/mode/1up
page(s): 346 [details]
page(s): 346 [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype MICH 1210074, geounit Oaxaca [details]
Isotype ENCB, geounit Oaxaca [details]
Isotype GENT, geounit Oaxaca [details]
Isotype MEXU, geounit Oaxaca [details]
From editor or global species database
Additional information The vicinity of Cerro Pelón, Oaxaca, is the only area of Mexico where more than one species of sect. Porocystis occurs. In addition to C. angustispica, C. boliviensis subsp. boliviensis has been collected there [details]Biology It fruits from late August to February. [details]
Comparison This species is smaller in stature than C. complanata and sometimes forms a dwarf “turf” in gravelly, sterile openings. The culms tend to be stiffly erect, not spreading to ascending, like those of C. complanata subsp. tropicalis. Carex angustispica presumably grows on acidic soils; it is found on volcanic rock in association with various members of the Ericaceae. Carex complanata subsp. tropicalis occurs often in areas of limestone soils. Also, it flowers and fruits throughout the year, but C. angustispica has been collected in fruit only from August through February. [details]
Description Densely cespitose from hard rhizomes rarely more than 0.5 cm long between shoots, usually scattered in small clumps; fertile culms (3—) 10-65 cm long, erect, stiff, trigonous, 0.4-1.2 mm wide ca. 1 cm below the inflorescence, the angles acute, smooth to minutely scabrous; bladeless basal sheaths reddish purple-tinged, spikes pistillate, ovoid to cylindrical, 4-14.5 mm long, 3-4.8 mm wide, with ca. 5— 40 perigynia. Pistillate scales 1.6-2.4 (-2.6) mm long, 1.3-1.7 mm wide, ca. 1.2-1.6 times as long as wide, ovate to broadly ovate, wider and shorter than the perigynia, obtuse to acute, sometimes minutely cuspidate, glabrous, stramineous hyaline to brownish with a green or pale brown 3-nerved center and narrow hyaline margins, the center smooth or sparsely and minutely scabrous; staminate scales 2.8-3.3 mm long, 1.3-1.9 mm wide, ca. 1.7—2.2 times as long as wide, ovate, acute to acuminate, stramineous to brownish with a green or pale brown 3-5-nerved center and narrow hyaline margins. Perigynia 2.1-2.8 mm long, 1.2-1.5 mm wide, widest at 1.1-1.4 mm below apex, ascending, flattened-trigonous, ovoid to obovoid, glabrous, firm-membranous, not inflated, green to brown, 2-ribbed with ca. 9-14 weak nerves that are inconspicuous at full maturity, the perigynia tapering to the base and to the apex, beakless, with a nearly entire, inconspicuous orifice. Achenes 1.4-1.8 mm long, 1.1-1.3 mm wide, flattened-trigonous, obovoid, yellowish to brown, puncticulate, sessile to short-pedicellate, bent-apiculate. Style withering; stigmas 3. Anthers 3, ca. 1.3-1.7 mm long.
[details]
Habitat Carex angustispica occurs in Oaxaca in grassy and sedgy areas among ericaceous shrubs in subalpine habitats or open pine forest on mountain summits and upper slopes at ca. 2800-3000 m. [details]
