Cyperaceae taxon details
Carex tenejapensis Reznicek & S.González
1676166 (urn:lsid:marinespecies.org:taxname:1676166)
accepted
Species
terrestrial
Reznicek, A. A.; González-Elizondo, M. S. (1999). New species of <i>Carex</i> (Cyperaceae) from Chiapas, Mexico. <em>Contributions from the University of Michigan Herbarium.</em> 22: 121-130., available online at https://www.biodiversitylibrary.org/page/12698223#page/127/mode/1up
page(s): 121 [details]
page(s): 121 [details]
Holotype IEB
000148172, geounit Chiapas
000148172, geounit Chiapas
Holotype IEB
000148172, geounit Chiapas [details]
000148172, geounit Chiapas [details]
Description Plants cespitose in dense, leafy clumps, with short rhizomes; roots brown, not densely felted with root hairs; fertile...
Description Plants cespitose in dense, leafy clumps, with short rhizomes; roots brown, not densely felted with root hairs; fertile culms ca. 55–125 cm tall, ascending and arched, trigonous, smooth, with scabrous or glabrous, reddish, bladeless basal sheaths with paler reddish veins. Leaves ca. 12–15, mostly basal; blades 20–55 cm long, 2.3–6.2 mm wide, flat to plicate, more or less scabrous dorsally on the veins, the margins and midrib finely antrorsely scabrous, the widest leaves 4.5–6.2 mm wide; leaf sheaths 4–10 cm long, tightly enveloping the culms, scabrous with minute reddish prickle-hairs, tinged dark purple-red; inner band of sheaths hispidulous near apex, greenish, red-tinged near the base, veined, the apex deeply concave or V-shaped, thin and easily splitting; ligules (4–) 8–16 mm long, acute, usually reduced on upper leaves, the very narrow free portion thickened and ciliate, reddish to stramineous to dark reddish purple. Vegetative shoots ca. 20–40 cm tall; leaves 7–13, similar to those of fertile culms; pseudoculms ca. 3.5–8 cm tall. Inflorescences ca. 18–50 cm long, with the upper 4–6 spikes overlapping and the lowest 2 spikes 7–22 cm distant; spikes single at nodes, the lower pendulous, the uppermost ascending to erect, on filiform, flexuous, scabrous peduncles; lowermost spikes with peduncles 4.5–11 cm long, the uppermost lateral spikes with peduncles ca. 0.5–1.5 cm long; lowermost bracts with blades 14–34 cm long and 1.4–4.4 mm wide, sheaths 3–5 (–7.2) cm long, otherwise similar to the leaves, the uppermost bracts much reduced. Spikes 6–10, the terminal staminate proximally and distally and pistillate in the middle, the lateral androgynous. Terminal spikes 3.1–7.6 cm long, staminate portion 18–32 mm long, 1.2–2.2 mm wide, and ca. 25–35-flowered proximally, 8–15 mm long and ca. 24–45-flowered distally; pistillate middle portion (2.5–) 9–24 mm long, 5–5.8 mm wide, (2–) 20–50-flowered; peduncles 3–6.5 mm long. Lateral spikes 2.8–7.7 cm long; staminate portion 1.5–12 mm long, ca. 3–35-flowered; pistillate portion 26–69 mm long, 4–6.1 mm wide, ca. 50–100-flowered. Pistillate scales 2.4–3.6 mm long, 1.2–1.6 mm wide, ovate, acute to acuminate, glabrous, reddish brown with narrow hyaline margins, the margins streaked with reddish brown and ciliate distally, with a prominent, distally scabrous midvein and 4–6 faintly lateral veins. Staminate scales 2.6–4 (–4.9) mm long, 1–1.6 mm wide, narrowly elliptic to ovate, obtuse to acuminate, glabrous, brown to reddish purple with narrow hyaline margins, with 1 prominent vein and sometimes with 2–4 faint lateral veins. Perigynia 2.6–3.4 mm long, 0.9–1.1 mm wide, ascending, slightly flattened-trigonous with more or less flat, narrowly elliptic sides, green to pale brown, faintly reddish dotted, glabrous, more or less cuneately tapered to the base, ca. 16–22-veined with 2 prominent and the rest fainter, contracted into a straight to slightly deflexed beak; beaks 0.6–1 mm long, green to brown, scabrous on the main veins, the apex oblique and ciliate to bidentulate, the teeth ciliate, up to 0.2 mm long. Achenes 1.7–2.1 mm long, 0.8–1 mm wide, trigonous with more or less flat, elliptic sides, tightly enveloped by the perigynium, brown, very finely papillate, tapered to the base. Styles withering; stigmas 3. Anthers 3, ca. 1–1.8 mm long. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex tenejapensis Reznicek & S.González. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1676166 on 2026-07-09
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Nomenclature
original description
Reznicek, A. A.; González-Elizondo, M. S. (1999). New species of <i>Carex</i> (Cyperaceae) from Chiapas, Mexico. <em>Contributions from the University of Michigan Herbarium.</em> 22: 121-130., available online at https://www.biodiversitylibrary.org/page/12698223#page/127/mode/1up
page(s): 121 [details]
page(s): 121 [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype IEB
000148172, geounit Chiapas [details]
000148172, geounit Chiapas [details]
From editor or global species database
Additional information Carex tenejapensis is known only from the type, collected in Chiapas in a shrubby opening in humid pine–oak forest on a steep limestone slope at 2100 m. Scattered clumps occurred in the most open sites among the shrubs and on rock ledges at 2700 m. Most plants were fully mature or nearly so, with some culms beginning to shed perigynia, so fruiting probably occurs from late June through July. The epithet refers to the type locality near the town of Tenejapa. [details]Comparison This species is an ally of Carex flexirostris, though it is significantly larger. In addition to the wider leaves and more numerous spikes noted in the key below, C. tenejapensis differs from C. flexirostris in being much leafier (the fertile culms with ca. 12–15 leaves versus 4–7), having larger bracts (the lowermost 14–33 cm long and 1.4–4.4 mm wide, versus 6–18 cm long and 1–1.9 mm wide), and in having anthers only 1–1.8 mm long versus 1.5–2.4 mm in C. flexirostris. Carex tenejapensis is also similar to C. perlonga Fern., which can also be a larger plant than C. flexirostris. In addition to the difference in the sheath apices noted in the key below, C. tenejapensis differs from C. perlonga in being leafier (the fertile culms with ca. 12–15 leaves versus 5–10), and in having reddish brown pistillate scales versus greenish to stramineous ones, reddish-dotted perigynia versus unornamented ones, and mostly smaller perigynia [2.6–3.4 mm long versus 2.7–4.5 (4.8) mm long]. [details]
Description Plants cespitose in dense, leafy clumps, with short rhizomes; roots brown, not densely felted with root hairs; fertile culms ca. 55–125 cm tall, ascending and arched, trigonous, smooth, with scabrous or glabrous, reddish, bladeless basal sheaths with paler reddish veins. Leaves ca. 12–15, mostly basal; blades 20–55 cm long, 2.3–6.2 mm wide, flat to plicate, more or less scabrous dorsally on the veins, the margins and midrib finely antrorsely scabrous, the widest leaves 4.5–6.2 mm wide; leaf sheaths 4–10 cm long, tightly enveloping the culms, scabrous with minute reddish prickle-hairs, tinged dark purple-red; inner band of sheaths hispidulous near apex, greenish, red-tinged near the base, veined, the apex deeply concave or V-shaped, thin and easily splitting; ligules (4–) 8–16 mm long, acute, usually reduced on upper leaves, the very narrow free portion thickened and ciliate, reddish to stramineous to dark reddish purple. Vegetative shoots ca. 20–40 cm tall; leaves 7–13, similar to those of fertile culms; pseudoculms ca. 3.5–8 cm tall. Inflorescences ca. 18–50 cm long, with the upper 4–6 spikes overlapping and the lowest 2 spikes 7–22 cm distant; spikes single at nodes, the lower pendulous, the uppermost ascending to erect, on filiform, flexuous, scabrous peduncles; lowermost spikes with peduncles 4.5–11 cm long, the uppermost lateral spikes with peduncles ca. 0.5–1.5 cm long; lowermost bracts with blades 14–34 cm long and 1.4–4.4 mm wide, sheaths 3–5 (–7.2) cm long, otherwise similar to the leaves, the uppermost bracts much reduced. Spikes 6–10, the terminal staminate proximally and distally and pistillate in the middle, the lateral androgynous. Terminal spikes 3.1–7.6 cm long, staminate portion 18–32 mm long, 1.2–2.2 mm wide, and ca. 25–35-flowered proximally, 8–15 mm long and ca. 24–45-flowered distally; pistillate middle portion (2.5–) 9–24 mm long, 5–5.8 mm wide, (2–) 20–50-flowered; peduncles 3–6.5 mm long. Lateral spikes 2.8–7.7 cm long; staminate portion 1.5–12 mm long, ca. 3–35-flowered; pistillate portion 26–69 mm long, 4–6.1 mm wide, ca. 50–100-flowered. Pistillate scales 2.4–3.6 mm long, 1.2–1.6 mm wide, ovate, acute to acuminate, glabrous, reddish brown with narrow hyaline margins, the margins streaked with reddish brown and ciliate distally, with a prominent, distally scabrous midvein and 4–6 faintly lateral veins. Staminate scales 2.6–4 (–4.9) mm long, 1–1.6 mm wide, narrowly elliptic to ovate, obtuse to acuminate, glabrous, brown to reddish purple with narrow hyaline margins, with 1 prominent vein and sometimes with 2–4 faint lateral veins. Perigynia 2.6–3.4 mm long, 0.9–1.1 mm wide, ascending, slightly flattened-trigonous with more or less flat, narrowly elliptic sides, green to pale brown, faintly reddish dotted, glabrous, more or less cuneately tapered to the base, ca. 16–22-veined with 2 prominent and the rest fainter, contracted into a straight to slightly deflexed beak; beaks 0.6–1 mm long, green to brown, scabrous on the main veins, the apex oblique and ciliate to bidentulate, the teeth ciliate, up to 0.2 mm long. Achenes 1.7–2.1 mm long, 0.8–1 mm wide, trigonous with more or less flat, elliptic sides, tightly enveloped by the perigynium, brown, very finely papillate, tapered to the base. Styles withering; stigmas 3. Anthers 3, ca. 1–1.8 mm long. [details]
