Poaceae
Phacelurus

Phacelurus digitatus (Sm.) Griseb.

First published in Spic. Fl. Rumel. 2: 424 (1846)
This species is accepted
The native range of this species is SE. Europe to Syria. It is a perennial and grows primarily in the temperate 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. Rhizomes short. Culms 80-130 cm long. Ligule a fringe of hairs. Leaf-blades (16-)20-75 cm long; (0.5-)3-7 mm wide; glaucous. Leaf-blade midrib widened. Leaf-blade margins scabrous. Leaf-blade apex attenuate; filiform.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1-7; single, or digitate, or borne along a central axis; 13-32 cm long. Central inflorescence axis 0-15 cm long. Rhachis semiterete; glabrous on surface. Rhachis internodes columnar; 15-22 mm long. Rhachis internode tip transverse; flat. Spikelets appressed; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear, or columnar; semiterete; 5-12 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Companion sterile spikelets well-developed; male; lanceolate; laterally compressed; 10-20 mm long; as long as fertile; separately deciduous. Companion sterile spikelet callus square, or oblong; 1-2.5 mm long; truncate. Companion sterile spikelet lemmas 2; enclosed by glumes. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 10-20 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus square; base truncate; attached transversely.
Sterile
Companion sterile spikelets well-developed; male; lanceolate; laterally compressed; 10-20 mm long; as long as fertile; separately deciduous. Companion sterile spikelet callus square, or oblong; 1-2.5 mm long; truncate. Companion sterile spikelet lemmas 2; enclosed by glumes.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 10-20 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus square; base truncate; attached transversely.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; coriaceous; 2-keeled. Lower glume surface smooth. Lower glume apex acuminate. Upper glume lanceolate; chartaceous; 1-keeled; 3 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret hyaline. Fertile lemma lanceolate; hyaline; without keel. Palea hyaline.
Distribution
Europe: southeastern. Asia-temperate: western Asia.
Reference
Andropogoneae. Fl Turk.
[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

    • Digital Image © Board of Trustees, RBG Kew 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

  • World Checklist of Vascular plants (WCVP)

    • 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