Cyperaceae taxon details
Rhynchospora stiletto Naczi & Ciafré
1681262 (urn:lsid:marinespecies.org:taxname:1681262)
accepted
Species
terrestrial
Ciafré, C. M.; Naczi, R. F. C. (2022). Rhynchospora stiletto (Cyperaceae), a new species of beaksedge from the southeastern U.S.A. <em>Kew Bulletin.</em> 77(3): 737-749., available online at https://doi.org/10.1007/s12225-022-10044-1
page(s): 740 [details]
page(s): 740 [details]
Holotype NY 04382644, geounit Tennessee
Holotype NY 04382644, geounit Tennessee [details]
Description Perennial herb, densely to loosely cespitose, erect. Rhizomes 0.7– 56 mmlong,0.5– 0.7mmwide;rootsfibrous. Culms 14– 107...
Description Perennial herb, densely to loosely cespitose, erect. Rhizomes 0.7– 56 mmlong,0.5– 0.7mmwide;rootsfibrous. Culms 14– 107 cm tall, 0.6– 1.1 mm wide at mid-height, obtusely triangular in cross-section, smooth, green, bases surrounded by stramineous, dull, old leaf sheaths. Leaves 5–8 per culm, arising along proximal 15– 38% of culm; sheaths 1.4– 7.3 cm long, stramineous or pale green, with minute ferruginous spots distally on portion of sheath opposite that from which bladearises, spots often coalesced to form ferruginous band at sheath apex; blades 7.8–32 cm long, 0.7–2.6 mm wide, the widest per plant 1.2– 2.1 (– 2.6) mm wide, green, the margins minutely serrulate. Infructescences terminal, racemiform, composed of congested and bracteate glomerules spirally disposed on distal portion of culm and terminating culm, 9.1– 64 cm long, 27– 69% of culm height, proximalmost internode 5.8– 16 cm long, distalmost internode 1.4– 5.1 cm long; bracts foliaceous proximally and setaceous distally, blades 11– 28 cm long, proximalmost much shorter than infructescence; glomerules 7– 14 × 4.2– 15 mm, the widest per plant 7.2-15 mm wide, turbinate, arising from 3– 7 nodes per culm, 2 per node or rarely 1 per node,borne on pedicels 4–9 mm long (including portion within bract sheath), glomerules of adjacent nodes separate, the 2 per node imbricate or separate by up to 1 mm; spikelets lanceoloid, (4–)11– 36 per glomerule, 5.0– 6.1 × 1.2– 1.3 mm,1-flowered,sessile or on pedicels up to 0.4 mm long; scales spirally imbricate, 6– 7perspikelet,1.1– 5.1 ×0.4– 2.1 mm, tightly surrounding fruit, veinless except for midrib, acute, proximal ones often mucronulate, dark ormediumbrown,thedistal two muchlonger than proximal ones, distalmost of each spikelet the longest, distalmost 3.5– 5.1 mm long, the distal two completely enwrapping the fruit including its tubercle. Perianth bristles 6, 3.3– 4.6 mm long, the longest per fruit 4.1-4.6 mmlong, the longest 0.87– 1.0 times as long as fruit (including tubercle), the longest shorter than tubercle by up to 0.6 mm or exceeding tubercle by up to 0.05mm, 0.1– 0.2 mm wide atbase, evenly attenuate from base to apex, pale or medium brown, retrorsely barbellate for entire length except for proximal 0.2– 0.6 mm, erect or very slightly spreading. Stamens 1perflower, filaments 3.4– 4.4 mm long, anthers 2.2– 2.3 mm long [these measurements based on the two anthers present on specimens examined]. Stigmas 2. Fruits (including the tubercle) narrowly ovoid, 4.3– 4.9 × 1.1– 1.2 mm, 3.64.2 times as long as wide, bearing persistent perianth bristles; fruit body 1.9– 2.1 mm long, 1.6– 1.8 times as long as wide, obovoid, smooth over entire surface, biconvex in cross-section, uniformly pale brown or in overmature specimens medium or dark brown with suborbicular area in centre of each face pale brown; tubercle evenly long-attenuate, stiletto-shaped, 2.3-2.7 mm long, 0.52– 0.85 mm wide at base, 2.8– 4.5 times as long as wide, 0.53– 0.58 times as long as fruit, 0.47–0.70times as wide as fruit, surface smooth, margins entire, flat in cross-section. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Rhynchospora stiletto Naczi & Ciafré. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1681262 on 2025-09-14
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2024-12-10 11:47:54Z
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Nomenclature
original description
Ciafré, C. M.; Naczi, R. F. C. (2022). Rhynchospora stiletto (Cyperaceae), a new species of beaksedge from the southeastern U.S.A. <em>Kew Bulletin.</em> 77(3): 737-749., available online at https://doi.org/10.1007/s12225-022-10044-1
page(s): 740 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 740 [details]
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 NY 04382644, geounit Tennessee [details]
From editor or global species database
Description Perennial herb, densely to loosely cespitose, erect. Rhizomes 0.7– 56 mmlong,0.5– 0.7mmwide;rootsfibrous. Culms 14– 107 cm tall, 0.6– 1.1 mm wide at mid-height, obtusely triangular in cross-section, smooth, green, bases surrounded by stramineous, dull, old leaf sheaths. Leaves 5–8 per culm, arising along proximal 15– 38% of culm; sheaths 1.4– 7.3 cm long, stramineous or pale green, with minute ferruginous spots distally on portion of sheath opposite that from which bladearises, spots often coalesced to form ferruginous band at sheath apex; blades 7.8–32 cm long, 0.7–2.6 mm wide, the widest per plant 1.2– 2.1 (– 2.6) mm wide, green, the margins minutely serrulate. Infructescences terminal, racemiform, composed of congested and bracteate glomerules spirally disposed on distal portion of culm and terminating culm, 9.1– 64 cm long, 27– 69% of culm height, proximalmost internode 5.8– 16 cm long, distalmost internode 1.4– 5.1 cm long; bracts foliaceous proximally and setaceous distally, blades 11– 28 cm long, proximalmost much shorter than infructescence; glomerules 7– 14 × 4.2– 15 mm, the widest per plant 7.2-15 mm wide, turbinate, arising from 3– 7 nodes per culm, 2 per node or rarely 1 per node,borne on pedicels 4–9 mm long (including portion within bract sheath), glomerules of adjacent nodes separate, the 2 per node imbricate or separate by up to 1 mm; spikelets lanceoloid, (4–)11– 36 per glomerule, 5.0– 6.1 × 1.2– 1.3 mm,1-flowered,sessile or on pedicels up to 0.4 mm long; scales spirally imbricate, 6– 7perspikelet,1.1– 5.1 ×0.4– 2.1 mm, tightly surrounding fruit, veinless except for midrib, acute, proximal ones often mucronulate, dark ormediumbrown,thedistal two muchlonger than proximal ones, distalmost of each spikelet the longest, distalmost 3.5– 5.1 mm long, the distal two completely enwrapping the fruit including its tubercle. Perianth bristles 6, 3.3– 4.6 mm long, the longest per fruit 4.1-4.6 mmlong, the longest 0.87– 1.0 times as long as fruit (including tubercle), the longest shorter than tubercle by up to 0.6 mm or exceeding tubercle by up to 0.05mm, 0.1– 0.2 mm wide atbase, evenly attenuate from base to apex, pale or medium brown, retrorsely barbellate for entire length except for proximal 0.2– 0.6 mm, erect or very slightly spreading. Stamens 1perflower, filaments 3.4– 4.4 mm long, anthers 2.2– 2.3 mm long [these measurements based on the two anthers present on specimens examined]. Stigmas 2. Fruits (including the tubercle) narrowly ovoid, 4.3– 4.9 × 1.1– 1.2 mm, 3.64.2 times as long as wide, bearing persistent perianth bristles; fruit body 1.9– 2.1 mm long, 1.6– 1.8 times as long as wide, obovoid, smooth over entire surface, biconvex in cross-section, uniformly pale brown or in overmature specimens medium or dark brown with suborbicular area in centre of each face pale brown; tubercle evenly long-attenuate, stiletto-shaped, 2.3-2.7 mm long, 0.52– 0.85 mm wide at base, 2.8– 4.5 times as long as wide, 0.53– 0.58 times as long as fruit, 0.47–0.70times as wide as fruit, surface smooth, margins entire, flat in cross-section. [details]
To International Plant Names Index (IPNI)
To New York Botanical Garden Steere Herbarium (Rhynchospora_stiletto_NY4382644_holotype_1)
To Plants of the World Online
To New York Botanical Garden Steere Herbarium (Rhynchospora_stiletto_NY4382644_holotype_1)
To Plants of the World Online
From editor or global species database
Hosted externally
