Cyperaceae taxon details
Carex viridistellata Derieg, Reznicek & Bruederle
1677369 (urn:lsid:marinespecies.org:taxname:1677369)
accepted
Species
terrestrial
Derieg, N. J.; Weil, S. J.; Reznicek, A. A.; Bruederle, L. P. (2013). Carex viridistellata sp. nov. (Cyperaceae), a new cryptic species from prairie fens of the Eastern United States. Systematic Botany, 38(1): 82-91., available online at https://doi.org/10.1600/036364413X661971
page(s): 89 [details] Available for editors
[request]
page(s): 89 [details] Available for editors
[request]
Holotype MICH 1485944, geounit Michigan
Holotype MICH 1485944, geounit Michigan [details]
Description Plants caespitose, fertile culms 12.9-68.1(-82.3) cm tall, 0.6-1.3 mm wide at base of lowermost spike, trigonous, green,...
Etymology The specific epithet "viridistellata" refers to the pistillate spikes, which are green (viridi) with perigynia radiating...
Description Plants caespitose, fertile culms 12.9-68.1(-82.3) cm tall, 0.6-1.3 mm wide at base of lowermost spike, trigonous, green, glabrous with occasional scabrous edges near spikes. Leaves 1-13, basal usually with one cauline; blades and sheaths (4.4-)6.3-70.2(-74) cm tall, widest blades 1.9-3.3 mm wide, green, occasionally yellowish, often with brown or yellow tips, heavily scabrous on apical, abaxial margins and veins. Sheaths 2.5-38.0(-49.8) cm tall, glabrous, pale green to stramineous, and tightly adhering to the culm. Inner band of sheaths white and transparent, thin, concave, with round or truncate apex. Ligules round or obtuse, 1.3-2.4 mm, free portion entire, white and transparent, 0.2-0.6 mm in length. Vegetative culms with mostly 7-14 leaves; leaves 2.1-59.5 cm tall, 1.9-3.6 mm wide, similar in color and texture to fertile culm leaves; pseudoculm 2.5-11.1 cm tall. Inflorescences (1.5-)2.0-11.0 cm long or 19.8-29.2 cm when distal spike present. Staminate spikes terminal and singular, rarely with 2 spikes, 6.0-23.8 mm long, 1.5-2.8 mm wide; peduncles 2.1-33.6 mm long, trigonous, often with lightly scabrous edges; ratio of peduncle length to spike length 0.2-2.1(-3.4). Staminate flowers ca. 30-98 per spike; scales lanceolate-ovate, acute or occasionally acuminate, 1(-3)-nerved, 3.2-4.5 mm long, 0.8-1.3(-2.0) mm wide with green center and thick white or brown transparent margins. Staminate spikes often subtended by a scale-like bract, 2.7-10.3(-18.0) mm long, with scabrous central nerve, sheathing base, and transparent margins. Pistillate spikes lateral, 1-3(-4), one spike per node, ca. 40-96-flowered, occasionally with 5-10 staminate flowers at apices, ellipsoid or globose, (6.6-)7.23-18.8 mm long, (7.3-)10-13.5(-14) mm wide, length to width ratio (0.7-)0.9-1.6(-1.7) but most often greater than one. When distal spike present, distance between lowest spikes 36.7-262.0 mm. Peduncles of uppermost pistillate spikes sessile to 5.6 mm, lowermost spike peduncles 2.6-27.7(-33.2) mm long or 46.2-103.0 mm long when distal spike present; trigonous with scabrous edges. Pistillate spikes subtended by leaf-like bracts, lower bracts ascending; lower blades 2.5-21.9(-24.1) cm long, 1.5-2.8 mm wide, sheaths (1.0-)1.6-20.6 mm long; ratio of lower bract length to inflorescence length (1.4-)1.6-3.2(-3.9) or (0.6-0.8)1.2-4.3 when distal spike present. Perigynia reflexed or spreading, irregularly trigonous, glabrous, 9-13-nerved, 4.5-6.7 mm long; bases inflated, yellow to green, transparent, 0.8-2.1 mm wide; beaks green, angled or occasionally straight, often with lightly scabrous margins, 2.0-3.2 mm long, bidentulate; teeth white or light green, 0.3-0.8 mm long. Pistillate scales triangular-ovate, acute or acuminate, 1-nerved with green center and wide white or yellow transparent margins, 2.2-3.5(-3.9) mm long, 0.6-1.3 mm wide and obscured by perigynia. Achenes trigonous, obovate, truncate, dark brown when mature, light brown with cream edges when immature, 1.2-1.6 mm long and 1.0-1.3 mm wide at widest point. [details]
Etymology The specific epithet "viridistellata" refers to the pistillate spikes, which are green (viridi) with perigynia radiating...
Etymology The specific epithet "viridistellata" refers to the pistillate spikes, which are green (viridi) with perigynia radiating like the rays of a star. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex viridistellata Derieg, Reznicek & Bruederle. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1677369 on 2025-04-01
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2024-12-10 11:47:54Z
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Nomenclature
original description
Derieg, N. J.; Weil, S. J.; Reznicek, A. A.; Bruederle, L. P. (2013). Carex viridistellata sp. nov. (Cyperaceae), a new cryptic species from prairie fens of the Eastern United States. Systematic Botany, 38(1): 82-91., available online at https://doi.org/10.1600/036364413X661971
page(s): 89 [details] Available for editors [request]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 89 [details] Available for editors
[request]basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype MICH 1485944, geounit Michigan [details]
From editor or global species database
Description Plants caespitose, fertile culms 12.9-68.1(-82.3) cm tall, 0.6-1.3 mm wide at base of lowermost spike, trigonous, green, glabrous with occasional scabrous edges near spikes. Leaves 1-13, basal usually with one cauline; blades and sheaths (4.4-)6.3-70.2(-74) cm tall, widest blades 1.9-3.3 mm wide, green, occasionally yellowish, often with brown or yellow tips, heavily scabrous on apical, abaxial margins and veins. Sheaths 2.5-38.0(-49.8) cm tall, glabrous, pale green to stramineous, and tightly adhering to the culm. Inner band of sheaths white and transparent, thin, concave, with round or truncate apex. Ligules round or obtuse, 1.3-2.4 mm, free portion entire, white and transparent, 0.2-0.6 mm in length. Vegetative culms with mostly 7-14 leaves; leaves 2.1-59.5 cm tall, 1.9-3.6 mm wide, similar in color and texture to fertile culm leaves; pseudoculm 2.5-11.1 cm tall. Inflorescences (1.5-)2.0-11.0 cm long or 19.8-29.2 cm when distal spike present. Staminate spikes terminal and singular, rarely with 2 spikes, 6.0-23.8 mm long, 1.5-2.8 mm wide; peduncles 2.1-33.6 mm long, trigonous, often with lightly scabrous edges; ratio of peduncle length to spike length 0.2-2.1(-3.4). Staminate flowers ca. 30-98 per spike; scales lanceolate-ovate, acute or occasionally acuminate, 1(-3)-nerved, 3.2-4.5 mm long, 0.8-1.3(-2.0) mm wide with green center and thick white or brown transparent margins. Staminate spikes often subtended by a scale-like bract, 2.7-10.3(-18.0) mm long, with scabrous central nerve, sheathing base, and transparent margins. Pistillate spikes lateral, 1-3(-4), one spike per node, ca. 40-96-flowered, occasionally with 5-10 staminate flowers at apices, ellipsoid or globose, (6.6-)7.23-18.8 mm long, (7.3-)10-13.5(-14) mm wide, length to width ratio (0.7-)0.9-1.6(-1.7) but most often greater than one. When distal spike present, distance between lowest spikes 36.7-262.0 mm. Peduncles of uppermost pistillate spikes sessile to 5.6 mm, lowermost spike peduncles 2.6-27.7(-33.2) mm long or 46.2-103.0 mm long when distal spike present; trigonous with scabrous edges. Pistillate spikes subtended by leaf-like bracts, lower bracts ascending; lower blades 2.5-21.9(-24.1) cm long, 1.5-2.8 mm wide, sheaths (1.0-)1.6-20.6 mm long; ratio of lower bract length to inflorescence length (1.4-)1.6-3.2(-3.9) or (0.6-0.8)1.2-4.3 when distal spike present. Perigynia reflexed or spreading, irregularly trigonous, glabrous, 9-13-nerved, 4.5-6.7 mm long; bases inflated, yellow to green, transparent, 0.8-2.1 mm wide; beaks green, angled or occasionally straight, often with lightly scabrous margins, 2.0-3.2 mm long, bidentulate; teeth white or light green, 0.3-0.8 mm long. Pistillate scales triangular-ovate, acute or acuminate, 1-nerved with green center and wide white or yellow transparent margins, 2.2-3.5(-3.9) mm long, 0.6-1.3 mm wide and obscured by perigynia. Achenes trigonous, obovate, truncate, dark brown when mature, light brown with cream edges when immature, 1.2-1.6 mm long and 1.0-1.3 mm wide at widest point. [details]Etymology The specific epithet "viridistellata" refers to the pistillate spikes, which are green (viridi) with perigynia radiating like the rays of a star. [details]
