Poaceae
Digitaria

Digitaria henrardii Veldkamp

First published in Blumea 21: 55 (1973)
This species is accepted
The native range of this species is Philippines. It is an annual and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Annual; caespitose. Cataphylls inconspicuous. Butt sheaths pilose. Culms erect; 20-40 cm long. Lateral branches ample. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule an eciliate membrane; 0.75-1.75 mm long; erose; truncate. Leaf-blades 1.5-7.5 cm long; 1.5-4 mm wide. Leaf-blade surface glabrous, or pilose; sparsely hairy; hairy adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2-4; paired, or digitate; unilateral; 1.5-7 cm long. Central inflorescence axis 0.5-2.75 cm long. Rhachis angular; scabrous on margins. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels curved; tip discoid, or cupuliform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 1.5-2 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 1.5-2 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes reaching apex of florets; thinner than fertile lemma. Lower glume oblate; 0.1-0.3 mm long; 0.05-0.15 length of spikelet; membranous; 0 -veined. Lower glume lateral veins absent. Lower glume apex truncate. Upper glume elliptic; 1 length of spikelet; membranous; without keels; (3-)5 -veined. Upper glume lateral veins transversely connected at apex. Upper glume surface pubescent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; (5-)7 -veined; with equidistant veins; with veins transversely connected at apex; pubescent; acute. Fertile lemma elliptic; 1.5-2 mm long; cartilaginous; much thinner on margins; light brown; without keel. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.
Morphology Reproductive morphology Flowers
Anthers 3; 0.5-0.6 mm long; purple.
Distribution
Asia-tropical: Malesia.
Reference
Paniceae. Veldkamp 1993.
[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