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This species is accepted, and its native range is W. Central Brazil.

[KBu]

Tucker GC. 2017. Cyperus vicky-martiniae, a new species of Cyperus sect. Luzuloidei (Cyperaceae) from central Brazil. kew Bulletin 72:32. DOI 10.1007/S12225-017-9705-6

Conservation
Cyperus vicky-martiniae appears to be genuinely rare. So far, only two collections have been found. Following IUCN (2016) guidelines, a status of VU D2 is proposed, because the new species is known to exist at less than five locations.
Distribution
Central Brazil, known only from the Federal District. The type locality, Sobradinho, is located at -15.669° lat., -47.804° long., elevation 1050 m. The Brazilian Central Plateau is noted for its ancient and complex geology. The type area is underlain by Neo-Proterozoic sedimentary rocks (quartzite, metasiltstone, limestone, and dolostone) c. 950 - 1170 million years old (Pimentel2016).
Ecology
Swampy roadsides, marshy ground, stream- sides, in open land.
Morphology Culms
Culms 0.7 - 1.1 mm thick, trigonous, smooth
Morphology General Habit
Caespitose perennials,40- 60 cm tall
Morphology General Scales
Scales deciduous, 10 - 12, 1.0 - 1.5 mm long, (0.7 -)1.0- 1.2 mm wide, oblong- spatulate (widest at or above the middle), mucronulate, uniformly light greenish to light brown, laterally 1-nerved (with a proximal adaxial groove on either side of the floral scale), basally bicarinate, apically scabrellate (or infrequently smooth)
Morphology Leaves
Leaves 4 - 7; sheaths reddish-purple, punctate; blade 20 - 35 cm long, 1 - 1.5 mm wide, v- shaped, without cross-veins (i.e., non-septate), the margins and keel scabrellate
Morphology Reproductive morphology Flowers
Heads glomerulate, 5 - 6mm wide, dense, hemispherical, light reddish-brown, often proliferous Rays 1 or 2, 5 - 7 mm long; or if rays lacking, the inflorescence a dense irregularly lobate head about 1 cm wide (no secondary rays)
Morphology Reproductive morphology Flowers Androecium Stamens
Stamen 1; filament 1.0 - 1.1 mm long; anther 0.9 mm long, oblong, the connective apex about 0 1 mm long, pale
Morphology Reproductive morphology Flowers Gynoecium Style
Style 0.5 - 0.8 mm long; stigmas 3, 0.6 - 1.0 mm long
Morphology Reproductive morphology Fruits
Achenes 1.0 - 1.1 mm long, 0.2 - 0.25 mm wide, trigonous, linear and slightly curved, the apex sub-acute, the base stipitate, slender, 0.1 - 0.2 mm long, dark, firm (not spongy), the faces slightly convex, the surface papillose, brown to black
Morphology Reproductive morphology Inflorescences
Inflorescence bracts 2 - 4, 2 - 12 cm long, 5 - 8(- 10) mm wide, v-shaped, the margins and keel scabrellate, borne horizontally to ascendent at c. 15°
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 10 - 25, 2.5 - 3.0 mm long, 4.5 - 7 mm wide, orbiculate-ovate, flattened; rachilla persistent, about 0.3 mm wide, 0.1 - 0.2 mm thick, quadrate, light reddish-brown, yellow at the nodes, successive scale scars 0.2 - 0.3 mm apart, wingless
Note
The epithet honours Vicky Martin Tuck­er, my wife, in appreciation for her encouragement and support throughout my botanical studies and professional career. The differences between the new species and its presumed nearest relatives are shown in Table 1.
Phenology
Specimens have been collected in April and September.
Type
Type: Brazil, Federal Distr.: Brasilia, vicinity of Sobredinho [sic],19Sept. 1964, G.T.Prance&N.T.Silva59083 (holotype NY; isotype MO).
Vegetative Multiplication Rhizomes
Rhizomes 5 - 8mm thick, short, upright, indurate

Native to:

Brazil West-Central

Cyperus vicky-martiniae G.C.Tucker appears in other Kew resources:

First published in Kew Bull. 72(2)-32: 1 (2017)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Literature

Kew Bulletin

  • Denton, M. F. (1978). A taxonomic treatment of the Luzulae group of Cyperus. Contr. Univ. Michigan Herb. 11: 197 - 271.
  • Guarise, N. J. & Vegetti, A. C. (2008). The inflores­cences structure of Cyperus L. section Luzuloidei Kunth (Cyperaceae). Pl. Syst. Evol. 271: 41 - 63.
  • IUCN Standards and Petitions Subcommittee (2016). Guidelines for Using the IUCN Red List Categories and Criteria. In: Version 12. Standards and Petitions Subcommittee, Prepared by the http://www.iucnredlist.org/documents/RedListGuidelines.pdf.
  • Kukenthal, G. (1935 - 36). Cyperaceae-Scirpoideae- Cypereae. In: A. Engler (ed.), Das Pflanzenreich IV. 20 (Heft 101): 1 - 671. W. Engelmann, Leipzig.
  • Larridon, I. , Huygh, W., Reynders, M., Muasya, A. M., Govaerts, R., Simpson, D. A. & Goetghebeur, P. (2011c). Nomenclature and typification of names of genera and subdivisions of genera in Cypereae (Cyperaceae): 2. Names of subdivisions of Cyperus. Taxon 60: 868 - 884.
  • Larridon, I., Reynders, M. , Bauters, K., Vrijdaghs, A., Leroux, O., Muasya, A. M. & Goetghebeur, P. (2011b). Taxonomic changes in C3 Cyperus (Cyperaceae) supported by molecular phylogenetic data, mor­phology, embryography, ontogeny and anatomy. Pl. Ecol. Evol. 144: 327 - 356.
  • Larridon, I., Reynders, M., Huygh, W., Bauters, K., Van de Putte, K., Muasya, A. M., Boeckx, P., Simpson, D. A., Vrijdaghs, A. & Goetghebeur, P. (2011a). Affinities in C3 Cyperus lineages (Cyperaceae) revealed using molecular phylogenetic data and carbon isotope analysis. Bot. J. Linn. Soc. 167: 19 - 46.
  • Pimentel, M. M. (2016). The tectonic evolution ofthe Neoproterozoic Brasilia Belt, central Brazil: a geochronological and isotopic approach. Brazil. J. Geol. 46 (Suppl. 1): 67 - 82. doi:10.1590/2317-4889201620150004
  • Tucker, G. C  (2013). Two new Neotropical species of Cyperus (Cyperaceae). Kew Bull. 68: 850 - 855.
  • Tucker, G. C , Carter, J. R. & Marcks, B. G. (2002). Cyperus (Cyperaceae — Sedge Family). In: Flora of North America Editorial Committee (eds), Flora of North America 23: 141 - 190. Oxford University Press, New York & Oxford.
  • Tucker, G. C (2001). Cyperus (Cyperaceae). In: W. D. Stevens, C. Ulloa Ulloa, A. Pool, O. M. Montiel, A. L. Arbelaez & D. M. Cutaia (eds), Flora de Nicaragua (Tomo I), Monogr. Syst. Bot. Missouri Bot. Gard. 85: 740 - 757.
  • Tucker, G. C (2007). Systematics of Cyperus L. section Diffusi Kunth(Cyperaceae)intheNeotropics.In:L.M. Barbosa, N. A. Dos Santos & Jr. (eds), A Botanica no Brasil: pesquisa, ensino e politicas publicas ambientes, pp. 311 - 314. Sociedade Botanica do Brasil, Sao Paulo.
  • Tucker, G. C. (1994). Revision of the Mexican Species of Cyperus L. (Cyperaceae). Syst. Bot. Monogr. 43: 1 - 213.

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0