Poaceae
Digitaria

Digitaria perpusilla Pilg.

First published in Bot. Jahrb. Syst. 69: 253 (1938)
This species is accepted
The native range of this species is Papua New Guinea. It is an annual and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Annual; caespitose. Culms erect; 3-7 cm long. Leaf-sheaths pilose. Ligule an eciliate membrane; 0.5 mm long; erose; truncate. Leaf-blades erect; linear, or lanceolate, or oblong; 0.5-1.5 cm long; 1-1.5 mm wide. Leaf-blade surface pilose.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Peduncle 0.5-1.5 cm long; glabrous. Racemes 1-2; single, or paired; erect; unilateral; 1-2 cm long. Rhachis narrowly winged; angular; scabrous on margins. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels 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; 1.6-1.8 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 1.6-1.8 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes one the lower absent or obscure; shorter than spikelet; thinner than fertile lemma. Upper glume oblong; 1.4-1.7 mm long; 0.8-0.95 length of spikelet; membranous; without keels; 3(-5) -veined. Upper glume lateral veins transversely connected at apex. Upper glume surface glabrous. Upper glume apex obtuse.
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; with unevenly spaced veins; with veins transversely connected at apex; glabrous; obtuse. Fertile lemma elliptic; 1.6-1.8 mm long; cartilaginous; much thinner on margins; dark brown; without keel. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.
Morphology Reproductive morphology Flowers
Anthers 3; 0.5 mm long; yellow. Stigmas purple.
Distribution
Asia-tropical: Papuasia.
Reference
Paniceae. Veldkamp 1997.
[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