1. Family: Poaceae Barnhart
    1. Genus: Arberella Soderstr. & C.E.Calderón
      1. Arberella costaricensis (Hitchc.) Soderstr. & C.E.Calderón

        This species is accepted, and its native range is Costa Rica.

    [GB]
    Habit
    Perennial; caespitose. Culms geniculately ascending; 20-40 cm long; wiry. Leaves cauline; distichous. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades spreading; lanceolate; 3.5-4.5 cm long; 4.5-9 mm wide. Leaf-blade surface pilose; densely hairy; hairy abaxially; with tubercle-based hairs. Leaf-blade margins scabrous. Leaf-blade apex acute.
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence. Inflorescence a panicle; comprising 1 fertile spikelets (and 5-10 male); terminal and axillary. Axillary inflorescences present in upper axils and in lower axils. Panicle open; lanceolate; 1.5-2 cm long; bearing few spikelets. Sexes segregated; on unisexual branches; with male below. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 8-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; woolly; truncate. Male spikelets distinct from female; 1 flowered; lanceolate; 3-3.7 mm long. Male spikelet glumes absent. Male spikelet lemma 3 -veined.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 8-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; woolly; truncate.
    Glume
    Glumes deciduous; similar; with lower wider than upper; exceeding apex of florets; thinner than fertile lemma. Lower glume elliptic; 8-9 mm long; 1 length of upper glume; membranous; pallid; without keels; 11 -veined. Lower glume apex acuminate. Upper glume elliptic; 8-9 mm long; 1.5 length of adjacent fertile lemma; membranous; pallid; without keels; 9 -veined. Upper glume apex acuminate.
    Florets
    Fertile florets female. Fertile lemma elliptic; dorsally compressed; 5.5 mm long; indurate; without keel; 5 -veined. Lemma surface pilose; hairy below. Lemma apex acute. Palea 1 length of lemma; indurate; 6 -veined.
    Flowers
    Lodicules 3; membranous; truncate. Anthers 3. Stigmas 2; terminally exserted; sparsely hairy.
    Male
    Male spikelets distinct from female; 1 flowered; lanceolate; 3-3.7 mm long. Male spikelet glumes absent. Male spikelet lemma 3 -veined.
    Distribution
    South America: Mesoamericana.
    Reference
    Olyreae. Pohl.

    Distribution

    Native to:

    Costa Rica

    Arberella costaricensis (Hitchc.) Soderstr. & C.E.Calderón appears in other Kew resources:

    First published in Brittonia 31: 439 (1979)

    Accepted by

    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    Literature

    Kew Backbone Distributions
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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