Calderonella Soderstr. & H.F.Decker
  • Ann. Missouri Bot. Gard. 60: 427 (1973) 

Notes: Distribution: Panama to Colombia

General Description

HABIT Perennial. Rhizomes short. Culms erect; 30-60 cm long. Ligule an eciliate membrane. Leaf-blade base with a false petiole. Leaf-blades lanceolate. Leaf-blade venation with distinct cross veins. INFLORESCENCE Inflorescence composed of racemes. Racemes single; paucilateral; bearing few fertile spikelets; bearing 6-7 fertile spikelets on each. Rhachis subterete. Spikelet packing broadside to rhachis; lax. Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong. FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or cuneate; laterally compressed; gibbous; 6.64-9.6 mm long; falling entire. GLUMES Glumes shorter than spikelet. Lower glume elliptic; 1.4 length of upper glume; herbaceous; without keels; 15-16 -veined. Lower glume lateral veins ribbed. Lower glume surface pilose. Lower glume apex obtuse. Upper glume ovate; 1 length of adjacent fertile lemma; herbaceous; without keels; 10-11 -veined. Upper glume lateral veins ribbed; with cross-veins. Upper glume surface pilose. Upper glume apex obtuse. FLORETS Fertile florets female. Fertile lemma oblate; gibbous; herbaceous; without keel; 15-19 -veined. Lemma lateral veins ribbed. Lemma surface pilose; hairy between veins. Lemma margins connate below. Lemma apex obtuse. Palea 2 -veined. Palea keels winged. Apical sterile florets 2-4 in number; male; lanceolate. FLOWER Lodicules 2; fleshy. Anthers 3. FRUIT Caryopsis with adherent pericarp; oblong; laterally compressed. Hilum punctiform. DISTRIBUTION South America.

Distribution Map

  • Native distribution
Found in
  • Southern America Central America Panamá
  • Western South America Colombia


  • 1 Govaerts, R.H.A. (2011). World checklist of selected plant families published update. Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

 Information From

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. [accessed 24 January 2012; 14:30 GMT]
  • A © Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from
  • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
World Checklist of Selected Plant Families
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; Retrieved 2011 onwards
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