Cyperaceae taxon details
Carex queretarensis Reznicek & S.González
1676914 (urn:lsid:marinespecies.org:taxname:1676914)
accepted
Species
terrestrial
Reznicek, A. A.; González-Elizondo, M. S. (1997). Two new species of <i>Carex</i> (Cyperaceae) from Mexico. <em>Contributions from the University of Michigan Herbarium.</em> 21: 291-297., available online at https://www.biodiversitylibrary.org/page/12699689#page/297/mode/1up
page(s): 291 [details]
page(s): 291 [details]
Holotype IEB
000139580, geounit Querétaro
000139580, geounit Querétaro
Holotype IEB
000139580, geounit Querétaro [details]
000139580, geounit Querétaro [details]
Description Plants loosely cespitose, with short, thick rhizomes; roots brown to dark brown, not densely felted with root hairs;...
Description Plants loosely cespitose, with short, thick rhizomes; roots brown to dark brown, not densely felted with root hairs; fertile culms 30–80 cm tall, trigonous, smooth, with scabrous, purple, bladeless sheaths with stramineous veins. Leaves 5–9, mostly basal; blades 6–45 cm long, 2.5–6.2 mm wide, plicate, more or less hispidulous on both surfaces just above ligule, otherwise glabrous, the margins antrorsely scabrous, the widest leaves 4.2–6.2 mm wide; leaf sheaths 1.5–12 cm long, more or less tightly enveloping culms, hispidulous with red prickle-hairs, especially on lower sheaths, strongly purple-tinged near base; inner band of sheaths finely hispidulous or glabrous, stramineous to purple-mottled, the apex concave; ligules 1.1–5 (–6.4) mm long, obtuse to acute, the free portion entire, erose, or slightly ciliate. Vegetative shoots ca. 15–40 cm tall; leaves 5–9, similar to those of fertile culms; pseudoculms 2–10 cm tall. Inflorescences 9–41 cm long, with the upper 2–4 spikes somewhat overlapping and the lowest 2 spikes 2–30 cm distant; spikes single at nodes, with all but the upper pendulous on filiform, flexuous, smooth to slightly scabrous-angled peduncles; lowermost spikes with peduncles 2.5–17.5 cm long, the uppermost lateral spikes with peduncles 0.4–1.7 cm long; lowermost bracts with blades 2.3–24 cm long and 0.8–3.6 mm wide and sheaths 1.1–7 cm long, the uppermost bracts much reduced. Spikes (3–) 4–7, the terminal staminate proximally and distally, and pistillate in the middle, occasionally staminate, the lateral androgynous or the lower sometimes pistillate. Terminal spikes 1.4–5.2 cm long, 1.5–2.9 mm wide, ca. 20–40-flowered if staminate, otherwise the staminate portion (0–) 0.5–1.5 cm long and 3–8-flowered proximally, and 0.4–1.8 cm long and 15–35-flowered distally; pistillate middle portion 0.3–2.5 cm long, 5.5–7 mm wide, 1–40-flowered; peduncles (2–) 4–9 (–17) mm long. Lateral spikes 1–5.3 cm long; staminate portion (0–) 0.2–1.5 cm long, (0–) 3–25-flowered; pistillate portion 1–4.4 cm long, 8–35-flowered. Pistillate scales 2.8–5.2 mm long, 1.5–2.1 mm wide, ovate to oblong, acute to acuminate-awned with scabrous awn up to 1.8 mm long, finely and sparsely pubescent distally, as well as scabrous on the midvein, green with broad, hyaline, whitish to pale brown margins, 3-veined. Staminate scales 3.9–5.8 mm long, 1.4–1.9 mm wide, ovate to narrowly ovate, obtuse to acuminate, occasionally with a scabrous awn up to 0.4 mm long, glabrous or finely scabrous, especially on and near the midvein, green with broad, hyaline, whitish to pale brown margins, 3-veined. Perigynia (3.6–) 4.1–5.6 mm long, 1.4–1.6 mm wide, ascending, trigonous with more or less flat, elliptic to obovate sides, green, pubescent over most of the body, cuneately tapered to a short-stipitate base, ca. 15–19-veined with 3–5 veins prominent and the rest faint, tapered into a beak; beaks 0.3–0.6 mm long, green, hispidulous, the apex oblique or irregularly bidentate, hyaline. Achenes 2.4–2.8 mm long, 1.2–1.4 mm wide, trigonous with more or less flat, obovate sides, tightly enveloped by the perigynium, pale brown, short-stipitate. Styles withering; stigmas 3. Anthers 3, 2.3–3 mm long. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex queretarensis Reznicek & S.González. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1676914 on 2026-06-16
Date
action
by
2024-12-10 11:47:54Z
unchecked
db_admin
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
original description
Reznicek, A. A.; González-Elizondo, M. S. (1997). Two new species of <i>Carex</i> (Cyperaceae) from Mexico. <em>Contributions from the University of Michigan Herbarium.</em> 21: 291-297., available online at https://www.biodiversitylibrary.org/page/12699689#page/297/mode/1up
page(s): 291 [details]
page(s): 291 [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype IEB
000139580, geounit Querétaro [details]
000139580, geounit Querétaro [details]
From editor or global species database
Additional information Carex queretarensis is locally frequent in pine-oak and oak-pine-juniper forest in the Municipio of Landa de Matamoros at ca. 1590–1760 m. Plants collected July 14 ranged from flowering to mature fruit, so fruiting presumably occurs from mid-July through August. The epithet queretarensis refers to the species being apparently endemic to the state of Querétaro. [details]Comparison All species of this complex resemble each other rather closely, but examination shows consistent, correlated differences in a number of features (Table 1). The variation appears to be neither clinal nor simply quantitative. All the taxa appear to be geographically isolated, local, endemic species. Carex queretarensis is most similar to C. pubigluma Reznicek, sharing with that species the pubescent pistillate and staminate scales and long anthers. It differs from C. pubigluma, however, in having hispidulous lower sheaths and more pointed pistillate scales; in these two characters it resembles C. caeligena Reznicek, which has smaller perigynia, shorter anthers, more strongly aggregated upper spikes, and longer ligules. [details]
Description Plants loosely cespitose, with short, thick rhizomes; roots brown to dark brown, not densely felted with root hairs; fertile culms 30–80 cm tall, trigonous, smooth, with scabrous, purple, bladeless sheaths with stramineous veins. Leaves 5–9, mostly basal; blades 6–45 cm long, 2.5–6.2 mm wide, plicate, more or less hispidulous on both surfaces just above ligule, otherwise glabrous, the margins antrorsely scabrous, the widest leaves 4.2–6.2 mm wide; leaf sheaths 1.5–12 cm long, more or less tightly enveloping culms, hispidulous with red prickle-hairs, especially on lower sheaths, strongly purple-tinged near base; inner band of sheaths finely hispidulous or glabrous, stramineous to purple-mottled, the apex concave; ligules 1.1–5 (–6.4) mm long, obtuse to acute, the free portion entire, erose, or slightly ciliate. Vegetative shoots ca. 15–40 cm tall; leaves 5–9, similar to those of fertile culms; pseudoculms 2–10 cm tall. Inflorescences 9–41 cm long, with the upper 2–4 spikes somewhat overlapping and the lowest 2 spikes 2–30 cm distant; spikes single at nodes, with all but the upper pendulous on filiform, flexuous, smooth to slightly scabrous-angled peduncles; lowermost spikes with peduncles 2.5–17.5 cm long, the uppermost lateral spikes with peduncles 0.4–1.7 cm long; lowermost bracts with blades 2.3–24 cm long and 0.8–3.6 mm wide and sheaths 1.1–7 cm long, the uppermost bracts much reduced. Spikes (3–) 4–7, the terminal staminate proximally and distally, and pistillate in the middle, occasionally staminate, the lateral androgynous or the lower sometimes pistillate. Terminal spikes 1.4–5.2 cm long, 1.5–2.9 mm wide, ca. 20–40-flowered if staminate, otherwise the staminate portion (0–) 0.5–1.5 cm long and 3–8-flowered proximally, and 0.4–1.8 cm long and 15–35-flowered distally; pistillate middle portion 0.3–2.5 cm long, 5.5–7 mm wide, 1–40-flowered; peduncles (2–) 4–9 (–17) mm long. Lateral spikes 1–5.3 cm long; staminate portion (0–) 0.2–1.5 cm long, (0–) 3–25-flowered; pistillate portion 1–4.4 cm long, 8–35-flowered. Pistillate scales 2.8–5.2 mm long, 1.5–2.1 mm wide, ovate to oblong, acute to acuminate-awned with scabrous awn up to 1.8 mm long, finely and sparsely pubescent distally, as well as scabrous on the midvein, green with broad, hyaline, whitish to pale brown margins, 3-veined. Staminate scales 3.9–5.8 mm long, 1.4–1.9 mm wide, ovate to narrowly ovate, obtuse to acuminate, occasionally with a scabrous awn up to 0.4 mm long, glabrous or finely scabrous, especially on and near the midvein, green with broad, hyaline, whitish to pale brown margins, 3-veined. Perigynia (3.6–) 4.1–5.6 mm long, 1.4–1.6 mm wide, ascending, trigonous with more or less flat, elliptic to obovate sides, green, pubescent over most of the body, cuneately tapered to a short-stipitate base, ca. 15–19-veined with 3–5 veins prominent and the rest faint, tapered into a beak; beaks 0.3–0.6 mm long, green, hispidulous, the apex oblique or irregularly bidentate, hyaline. Achenes 2.4–2.8 mm long, 1.2–1.4 mm wide, trigonous with more or less flat, obovate sides, tightly enveloped by the perigynium, pale brown, short-stipitate. Styles withering; stigmas 3. Anthers 3, 2.3–3 mm long. [details]
