Puccinellia acroxantha C.A.Sm. & C.E.Hubb.

First published in Bull. Misc. Inform. Kew 1929: 86 (1929)
This species is accepted
The native range of this species is S. Africa. It is a perennial and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose; clumped loosely. Basal innovations extravaginal and intravaginal. Culms erect, or geniculately ascending; 30-60 cm long; 2 -noded. Culm-internodes terete; smooth; distally glabrous. Lateral branches lacking. Leaf-sheaths loose; striately veined; smooth; glabrous on surface. Ligule an eciliate membrane; 2-3.5 mm long; obtuse. Leaf-blades convolute; 9-18 cm long; 1-2 mm wide. Leaf-blade surface scaberulous; rough adaxially; glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; linear; 12-20 cm long; 1.5 cm wide. Primary panicle branches appressed; simple; 1-5 cm long. Panicle axis with lower internodes 2-4.5 cm long; scaberulous; with scattered hairs. Panicle branches flexuous; scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-2.5 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 3-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 5 mm long; 1.5 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 3-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 5 mm long; 1.5 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 1-1.3 mm long; 0.5-0.66 length of upper glume; membranous; much thinner above; much thinner on margins; without keels; 1-3 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex obtuse. Upper glume ovate; 2 mm long; 0.75 length of adjacent fertile lemma; membranous; much thinner above; with hyaline margins; without keels; 3 -veined. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 2.5-2.8 mm long; membranous; much thinner above; much thinner on margins; mid-green and yellow; tipped with last colour; without keel; 5 -veined. Lemma midvein pubescent; hairy below. Lemma lateral veins stopping well short of apex. Lemma margins pubescent; hairy below. Lemma apex obtuse. Palea 1 length of lemma; 2 -veined. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
Africa: south.
Reference
Poeae. CEH 1999.
[GB]

Sources

  • 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 2022. 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 2022. 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