Cyperaceae taxon details
Hypolytrum jardimii M.Alves & W.W.Thomas
1678865 (urn:lsid:marinespecies.org:taxname:1678865)
accepted
Species
terrestrial
Not documented
Description Herbs moderately robust, 20–70 cm tall, rhizomatous, noncaespitose, perennial; rhizome densely branching, long to short...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Brittonia 54: 128 2002 to Brittonia 54: 128 (2002), information...
Description Herbs moderately robust, 20–70 cm tall, rhizomatous, noncaespitose, perennial; rhizome densely branching, long to short creeping, 3–4 mm diam.; pseudoculm trigonous; cataphylls deep wine, chartaceous. Leaves basal; leaf blades oblong-lanceolate, 14–32 × 2.8–5.7 cm, arching, green adaxially, reddish to deep wine abaxially, nonbullate, coriaceous, 3-costate with secondary costae distinct, inverse W-shaped in cross section, apex acuminate, margins and midrib scabrous; pseudopetiole present; sheath margins 0.5–1.5 mm wide, reddish brown, membranaceous. Culm 1 per plant, scapiform, central, erect, 28–50 cm × 2–3 mm, trigonous, scabrous on angles, leafy; bract subtending the synflorescence foliaceous, oblong, 11–25 cm long, surpassing the synflorescence; pseudopetiole present. Synflorescence terminal, paniculiform, cylindrical, lax; main axis 4–5 cm long, branched; nodes 5–10; first internode 0.6–2.8 cm long; second internode 0.6–2.5 cm long; paraclades 2–3 on basal node, patent to erect; second-order ramification present and unbranched; main epipodium 0.6–1.1 cm long, lightly scabrous; prophylls 2-keeled. Spike sessile, ellipsoid, 3–5 mm; spicoid bracts 1.5–2 mm, brown, apex obtuse, margins membranaceous; floral bracts 2, free, 1.5–2.5 mm, apex acute, keel wingless, scabridulous. Staminate flowers 2 per spicoid; anthers obclavate, 1.2–1.5 mm long; filaments 3.5–4 mm long; stigma branches 2; style 0.7–1 mm long. Fructification biconvex, ovoid, 1.5–1.6 × 0.9–1.1 mm, plumbeous and not dotted, wrinkled; apex contracted; base obtusoid. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Brittonia 54: 128 2002 to Brittonia 54: 128 (2002), information...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Brittonia 54: 128 2002 to Brittonia 54: 128 (2002), information provided by Alan E. on email Jun. 07 2021 More details could be found in T [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Hypolytrum jardimii M.Alves & W.W.Thomas. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1678865 on 2026-09-20
The webpage text is licensed under a Creative Commons
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Nomenclature
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
From editor or global species database
Description Herbs moderately robust, 20–70 cm tall, rhizomatous, noncaespitose, perennial; rhizome densely branching, long to short creeping, 3–4 mm diam.; pseudoculm trigonous; cataphylls deep wine, chartaceous. Leaves basal; leaf blades oblong-lanceolate, 14–32 × 2.8–5.7 cm, arching, green adaxially, reddish to deep wine abaxially, nonbullate, coriaceous, 3-costate with secondary costae distinct, inverse W-shaped in cross section, apex acuminate, margins and midrib scabrous; pseudopetiole present; sheath margins 0.5–1.5 mm wide, reddish brown, membranaceous. Culm 1 per plant, scapiform, central, erect, 28–50 cm × 2–3 mm, trigonous, scabrous on angles, leafy; bract subtending the synflorescence foliaceous, oblong, 11–25 cm long, surpassing the synflorescence; pseudopetiole present. Synflorescence terminal, paniculiform, cylindrical, lax; main axis 4–5 cm long, branched; nodes 5–10; first internode 0.6–2.8 cm long; second internode 0.6–2.5 cm long; paraclades 2–3 on basal node, patent to erect; second-order ramification present and unbranched; main epipodium 0.6–1.1 cm long, lightly scabrous; prophylls 2-keeled. Spike sessile, ellipsoid, 3–5 mm; spicoid bracts 1.5–2 mm, brown, apex obtuse, margins membranaceous; floral bracts 2, free, 1.5–2.5 mm, apex acute, keel wingless, scabridulous. Staminate flowers 2 per spicoid; anthers obclavate, 1.2–1.5 mm long; filaments 3.5–4 mm long; stigma branches 2; style 0.7–1 mm long. Fructification biconvex, ovoid, 1.5–1.6 × 0.9–1.1 mm, plumbeous and not dotted, wrinkled; apex contracted; base obtusoid. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Brittonia 54: 128 2002 to Brittonia 54: 128 (2002), information provided by Alan E. on email Jun. 07 2021 More details could be found in T [details]
