Poaceae
Tripsacum

Tripsacum cundinamarce De Wet & Timothy

First published in Amer. J. Bot. 68: 274 (1981)
This species is accepted
The native range of this species is Colombia. It is a perennial or rhizomatous geophyte and grows primarily in the seasonally dry tropical biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/122101259/122104985

Conservation
DD - data deficient
[IUCN]

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: threatened. Confidence: confident
[AERP]

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution
Endémica y nativa en Colombia; Alt. 1000 - 1500 m.; Andes.
Morphology General Habit
Hierba
Conservation
No Evaluada
[CPLC]

Distribution
Biogeografic region: Andean. Elevation range: 1000–1500 m a.s.l. Endemic to Colombia. Colombian departments: Cundinamarca.
Habit
Herb.
[UPFC]

Morphology General Habit
Perennial; caespitose. Rhizomes elongated; knotty. Culms erect, or geniculately ascending; robust; 400-500 cm long. Culm-internodes solid. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane. Leaf-blade base with a false petiole. Leaf-blades lanceolate; 60-120 cm long; 40-60 mm wide; glaucous. Leaf-blade surface smooth; glabrous.
Morphology Reproductive morphology Inflorescences
Monoecious; with male and female spikelets in the same inflorescence. Inflorescence composed of racemes; terminal and axillary. Racemes 4-10; digitate; erect; arcuate; smoothly terete; unilateral; 12-25 cm long. Central inflorescence axis 3-5 cm long. Rhachis (female) fragile at the nodes; subcylindrical and excavated. Spikelet packing abaxial. Rhachis internodes oblong; adherent to upper glume of sessile spikelet. Rhachis internode tip transverse; crateriform. Sexes segregated; on bisexual branches; with male above. Spikelets sunken; solitary. Fertile spikelets sessile. Male spikelets sessile; 2 in a cluster.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 6-8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely. Male spikelets distinct from female; all deciduous together; 5-7 mm long; hairy. Male spikelet glumes 2; coriaceous; muticous.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 6-8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; firmer than fertile lemma. Lower glume ovate; 1 length of spikelet; indurate; without keels. Lower glume apex acute. Upper glume ovate; cartilaginous; without keels. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline. Fertile florets female. Fertile lemma oblong; hyaline; without keel. Palea hyaline.
sex Male
Male spikelets distinct from female; all deciduous together; 5-7 mm long; hairy. Male spikelet glumes 2; coriaceous; muticous.
Distribution
South America: western South America.
Reference
Andropogoneae. De Wet & Timothy 2004.
[GB]

Uses

Use Gene Sources
Used as gene sources.
[UPFC]

Sources

  • Angiosperm Extinction Risk Predictions v1

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

  • Catálogo de Plantas y Líquenes de Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • 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

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/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

  • Useful Plants and Fungi of Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0