Tenaxia N.P.Barker & H.P.Linder
  • Ann. Missouri Bot. Gard. 97: 350 (2010) 


General Description

HABIT Perennial. Rhizomes absent (6), or short (2). Culms erect (3/3), or geniculately ascending (1/3); 10-46.71-117 cm long. Lateral branches lacking (2/2). Ligule a fringe of hairs. Leaf-blades aciculate (1), or filiform (6), or linear (2); herbaceous (6), or coriaceous (2); stiff (4), or firm (4). Leaf-blade margins cartilaginous (1/1). Leaf-blade apex muticous (7), or pungent (1). INFLORESCENCE Inflorescence a panicle (7), or composed of racemes (2), or comprising only a few spikelets (1). Panicle open (3/7), or contracted (5/7). Racemes single (2/2); unilateral (1/2), or paucilateral (1/2). Rhachis angular (1/1). Spikelets solitary. Fertile spikelets pedicelled. FERTILE SPIKELETS Spikelets comprising 2 fertile florets (3), or 3-5 fertile florets (6), or 6-7 fertile florets (3); with diminished florets at the apex. Spikelets cuneate; laterally compressed; 9-15-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent (1), or pilose (5), or bearded (2). GLUMES Glumes persistent; shorter than spikelet (1), or exceeding apex of florets (7); thinner than fertile lemma; gaping. Lower glume lanceolate, or elliptic (1); 0.8-0.975-1 length of upper glume; membranous; without keels; 1-2 -veined (1), or 3 -veined, or 4-5 -veined (6), or 6-7 -veined (1). Lower glume apex acute (3), or acuminate (6), or attenuate (1); muticous (7), or mucronate (1). Upper glume lanceolate (7), or elliptic (2); 1-1.812-2.5 length of adjacent fertile lemma; membranous; with undifferentiated margins (6), or hyaline margins (2); without keels; 1-2 -veined (1), or 3 -veined (5), or 4 -veined (4), or 5 -veined (7), or 6-7 -veined (2). Upper glume apex acute (3), or acuminate (6), or attenuate (1); muticous (7), or mucronate (1). FLORETS Fertile lemma elliptic (2), or oblong (6); chartaceous (7), or coriaceous (1); without keel; 5-7 -veined (1), or 9 -veined (7). Lemma surface glabrous (6), or pubescent (2), or pilose (1); without hair tufts (1), or with basal hair tufts near margin (2), or with marginal hair tufts (3), or with a transverse row of hair tufts (2). Lemma margins eciliate (5), or ciliate (3). Lemma apex lobed; 2 -fid; incised 0.25-0.4494-0.7 of lemma length; acute (1/1), or acuminate (1/1); awned; 1 -awned (2), or 3 -awned (6). Principal lemma awn from a sinus; geniculate. Lateral lemma awns shorter than principal (2/2). Palea 1 length of lemma; 2 -veined (2/2). Palea keels smooth (4), or scaberulous (2), or scabrous (2); eciliate (4), or pubescent (3), or ciliolate (1). Palea surface glabrous (5), or puberulous (2), or pilose (1). Apical sterile florets resembling fertile though underdeveloped. FLOWER Lodicules 2; membranous (2), or fleshy (6); ciliate. Anthers 3. FRUIT Caryopsis with adherent pericarp; oblong (1/3), or obovoid (2/3). Embryo 0.5 length of caryopsis. Hilum elliptic (1/1). DISTRIBUTION Africa (6), or Temperate Asia (3), or Tropical Asia (2).

Distribution Map

 
  • Native distribution
Found in
  • Africa Northeast Tropical Africa Ethiopia
  • South Tropical Africa Zimbabwe
  • Southern Africa Cape Provinces
  • Free State
  • KwaZulu-Natal
  • Lesotho
  • Namibia
  • Asia-Temperate Western Asia Afghanistan
  • Asia-Tropical Indian Subcontinent East Himalaya
  • Nepal
  • West Himalaya

 Information From

GrassBase - The Online World Grass Flora
http://www.kew.org/data/grasses-db/
Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora. http://www.kew.org/data/grasses-db.html. [accessed 24 January 2012; 14:30 GMT]
  • A © Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
  • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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