Chusquea nana (L.G.Clark) L.G.Clark

First published in Syst. Bot. 34: 681 (2009)
This species is accepted
The native range of this species is Ecuador. It is a bamboo and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; reed-like; 20-130 cm long; 2-4 mm diam.; woody. Culm-internodes terete; 1-6.3 cm long; distally glabrous. Lateral branches lacking. Leaf-sheaths keeled; striately veined; papillose; glabrous on surface; outer margin glabrous, or hairy. Leaf-sheath auricles erect. Ligule an eciliate membrane, or a ciliate membrane; 2-5 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2-0.3 cm long. Leaf-blades erect; deciduous at the ligule; linear, or lanceolate; 11-39 cm long; 6-14 mm wide; stiff. Leaf-blade midrib conspicuous. Leaf-blade venation with distinct cross veins. Leaf-blade surface smooth, or scabrous; rough adaxially; glabrous, or pubescent; hairy abaxially. Leaf-blade margins cartilaginous; smooth, or scabrous. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; subtended by an unspecialized leaf-sheath, or bracts (1 bract 1-3mm long). Peduncle 5-44 cm long; glabrous. Panicle contracted; linear; 18-37 cm long; 1-2.5 cm wide. Primary panicle branches appressed, or ascending; 2.5-11 cm long. Panicle axis glabrous, or pilose. Panicle branches glabrous, or pilose; with insignificant pulvini. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-4 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; compressed slightly; 3.6-6 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; compressed slightly; 3.6-6 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 1.5-4.3 mm long; coriaceous; without keels; 1-3 -veined. Lower glume lateral veins absent. Lower glume surface scabrous; inner surface pubescent. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 1.7-6.7 mm long. Upper glume ovate; 2-4 mm long; coriaceous; without keels; 1-3 -veined. Upper glume lateral veins absent, or distinct. Upper glume surface scabrous; rough generally; inner surface pubescent. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 1.6-7 mm long.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets similar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret ovate; 2.8-5 mm long; coriaceous; 3(-5) -veined; scabrous; rough above; acute. Lemma of upper sterile floret ovate; 3.1-5 mm long; scabrous (above); acute. Fertile lemma ovate; 3.8-5.4 mm long; coriaceous; without keel; 5(-7) -veined. Lemma surface smooth, or scaberulous; rough above. Lemma apex acute; muticous, or mucronate. Palea 3.5-5 mm long; coriaceous; 2(-4) -veined; without keels. Palea surface scabrous (at tip).
Morphology Reproductive morphology Flowers
Lodicules 3; 1-1.5 mm long; veined; glabrous. Anthers 3; 2.2-2.5 mm long. Stigmas 2. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 3.1 mm long. Embryo 0.15 length of caryopsis. Hilum linear.
Distribution
South America: western South America.
Reference
Bambuseae. Clarke 2001.
[GB]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/45962/11021794

Conservation
NT - near threatened
[IUCN]

Sources

  • GrassBase - The Online World Grass Flora

    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0