- Family: Poaceae Barnhart
- Genus: Andropogon L.
Andropogon crassus Sohns
- Genus: Andropogon L.
[GB]
- Morphology General Habit
- Perennial; caespitose. Culms erect; 100-200 cm long. Culm-nodes glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1.5 mm long. Leaf-blades 20-45 cm long; 10-20 mm wide. Leaf-blade surface glabrous; hairless except near base. Leaf-blade margins scabrous. Leaf-blade apex attenuate.
- Morphology Reproductive morphology Inflorescences
- Synflorescence compound; linear. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; enclosed. Spatheole linear. Racemes 1; single; 1-4 cm long. Rhachis fragile at the nodes; with scattered hairs; ciliate on margins. Rhachis internodes clavate; 3 mm long. Rhachis internode tip transverse; cupuliform; with simple rim. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; 2.5 mm long; ciliate; hairy on margins.
- Sterile
- Companion sterile spikelets well-developed; comprising 2 subequal glumes without lemmas; linear; 3-4 mm long; separately deciduous. Companion sterile spikelet glumes chartaceous.
- Morphology Reproductive morphology Inflorescences Spikelets
- Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4-4.2 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; inserted. Companion sterile spikelets well-developed; comprising 2 subequal glumes without lemmas; linear; 3-4 mm long; separately deciduous. Companion sterile spikelet glumes chartaceous.
- Fertile
- Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4-4.2 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; inserted.
- 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; keeled laterally; 4 -veined. Lower glume surface concave. Upper glume linear; coriaceous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume muticous.
- Morphology Reproductive morphology Flowers Florets
- Basal sterile florets barren; with palea, or without significant palea. Lemma of lower sterile floret oblong; 2.8-4 mm long; hyaline; 3 -veined; ciliolate on margins. Palea of lower sterile floret 0-2 mm long. Fertile lemma lanceolate; 2-3.2 mm long; hyaline; without keel. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 5-8 mm long overall; with a straight or slightly twisted column. Column of lemma awn glabrous. Palea 2-2.5 mm long; hyaline.
- Morphology Reproductive morphology Flowers
- Lodicules 2; 0.5-0.7 mm long. Anthers 3; 1.5-1.8 mm long.
- Distribution
- South America: northern South America.
- Reference
- Andropogoneae. Sohns 2004.
Native to:
Venezuela
Andropogon crassus Sohns appears in other Kew resources:
First published in Mem. New York Bot. Gard. 9: 405 (1957)
Accepted by
- Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
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 Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0
Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0