Poaceae
Digitaria

Digitaria manongarivensis A.Camus

First published in Blumea 1: 110 (1934)
This species is accepted
The native range of this species is Madagascar. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose; clumped loosely. Cataphylls evident. Basal innovations extravaginal. Culms erect; 30 cm long; 0.5 mm diam.; 3-4 -noded. Culm-nodes glabrous. Leaf-sheaths 10 cm long; mostly shorter than adjacent culm internode; pilose. Ligule an eciliate membrane; 1 mm long. Leaf-blades 4-9 cm long; 2 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface pilose; hairy on both sides. Leaf-blade margins cartilaginous. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2; paired; unilateral; 7-8 cm long. Central inflorescence axis 1 cm long. Rhachis narrowly winged. Raceme-bases linear. Spikelets in threes. Fertile spikelets sessile and pedicelled; 3 in the cluster. Pedicels glabrous; tip cupuliform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; compressed slightly; 2 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; compressed slightly; 2 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume ovate; 2 mm long; 1 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface puberulous; with verruculose hairs.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 7 -veined; puberulous; with verruculose hairs; acute. Fertile lemma elliptic; 2 mm long; cartilaginous; much thinner on margins; pallid; without keel. Lemma surface striate. Lemma margins flat; covering most of palea. Palea cartilaginous.
Distribution
Africa: western Indian ocean.
Reference
Paniceae. Camus 2007.
[GB]

Sources

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). 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 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