Poaceae
Eriochrysis

Eriochrysis filiformis (Hack.) Filg.

First published in Novon 7: 231 (1997)
This species is accepted
The native range of this species is Brazil to Paraguay. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial; caespitose; clumped densely. Rhizomes short; knotty. Culms erect; 30-55 cm long; 2-4 -noded. Culm-internodes thin-walled; distally glabrous. Culm-nodes pubescent. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths without keel; striately veined; glabrous on surface; outer margin glabrous. Ligule a ciliate membrane; 1-1.5 mm long. Leaf-blades flat, or involute; 10-45 cm long; 1-3 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes borne along a central axis; distant; ascending; bearing few fertile spikelets; bearing 2-4 fertile spikelets on each. Central inflorescence axis 4-7 cm long. Rhachis fragile at the nodes; subterete. Rhachis internodes linear. Rhachis internode tip clavate. Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; the upper smaller (female). Pedicels linear; 4-6 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 4.5-5.5 mm long; falling entire; deciduous from the base and with accessory branch structures. Spikelet callus bearded; base truncate. Spikelet callus hairs red; 2-4 mm long; 0.5-0.8 length of spikelet.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 4.5-5.5 mm long; falling entire; deciduous from the base and with accessory branch structures. Spikelet callus bearded; base truncate. Spikelet callus hairs red; 2-4 mm long; 0.5-0.8 length of spikelet.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 4-4.8 mm long; 1 length of spikelet; cartilaginous; without keels; 5-7 -veined. Lower glume lateral veins prominent. Lower glume surface flat; glabrous, or pilose. Lower glume hairs red. Upper glume elliptic; 3.5-4 mm long; 5-7 -veined. Upper glume lateral veins prominent. Upper glume surface glabrous, or pilose. Upper glume hairs red.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2.8-3.2 mm long; hyaline. Fertile lemma lanceolate; 3-3.3 mm long; hyaline; without keel. Lemma surface puberulous. Lemma margins ciliate. Palea absent or minute.
Morphology Reproductive morphology Flowers
Anthers 3; 3-3.3 mm long; purple.
Distribution
South America: Brazil and southern South America.
Reference
Andropogoneae. Filguieras 2004.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 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 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0