Poaceae
Digitaria

Digitaria eminens (Steud.) Backer

First published in K.Heyne, Nutt. Pl. Ned.-Ind. 1(compl. ed.): 156 (1922)
This species is accepted
The native range of this species is E. Jawa. It is a perennial and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 100-200 cm long. Lateral branches ample. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1.6-3 mm long; erose; truncate, or obtuse. Leaf-blades 7.5-12.5 cm long; 5-7(-10) mm wide. Leaf-blade surface scabrous; glabrous, or pilose; sparsely hairy.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2-3(-5); paired, or digitate; unilateral; 10-24 cm long. Central inflorescence axis 0-1.2 cm long. Rhachis narrowly winged; angular; scabrous on margins. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels tip rectangular.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5-6.25 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5-6.25 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.25-1 mm long; 0.05-0.15 length of spikelet; membranous; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse, or acute. Upper glume elliptic; 3-4.5 mm long; 0.65-0.8 length of spikelet; membranous; without keels; 3 -veined. 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; 9-11 -veined; glabrous; villous on margins; acute. Fertile lemma elliptic; 4.5-6 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.
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