Semiarundinaria Makino ex Nakai
  • J. Arnold Arbor. 6: 150 (1925) 


General Description

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 152-609.3-1000 cm long; woody. Culm-internodes terete (5), or channelled (2). Lateral branches dendroid. Branch complement three (6/6), or several (4/6); in a horizontal line (6/6); with subequal branches (2/2), or 3 branches dominant (1/2); thinner than stem (1/1). Culm-sheaths deciduous (3/3); without auricles (5/6), or auriculate (1/6). Culm-sheath blade linear (4/5), or lanceolate (2/5). Leaf-sheath auricles absent (6), or falcate (1). Ligule an eciliate membrane (1), or a ciliolate membrane (6). Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate, or elliptic (3). Leaf-blade venation without cross veins (3), or with distinct cross veins (4). INFLORESCENCE Synflorescence bractiferous (6/6); fasciculate (6/6); with spathaceous subtending bracts (6/6); without axillary buds at base of spikelet (6/6). Fertile spikelets sessile (6/6). FERTILE SPIKELETS Spikelets comprising 2 fertile florets (1/6), or 3-5 fertile florets (3/6), or 6 fertile florets (2/6); with diminished florets at the apex (6/6). Spikelets linear (3/6), or lanceolate (3/6); laterally compressed (6/6); 30-51.5-100 mm long; breaking up at maturity (6/6); disarticulating below each fertile floret (6/6). Rhachilla internodes glabrous (3/6), or sparsely hairy (2/6), or pubescent (1/6). GLUMES Glumes one the lower absent or obscure (3/6), or two (4/6); persistent (6/6); shorter than spikelet (6/6). Lower glume elliptic (2/3), or ovate (1/3); 0.8-0.925-1 length of upper glume; chartaceous (3/3); without keels (3/3); 7 -veined (1/1). Lower glume apex acute (3/3). Upper glume lanceolate (1/5), or elliptic (2/5), or ovate (2/5); 0.7-0.75-0.8 length of adjacent fertile lemma; chartaceous (5/5); without keels (5/5); 7 -veined (1/1). Upper glume apex acute (5/5). FLORETS Fertile lemma elliptic (2/6), or oblong (2/6), or ovate (2/6); chartaceous (6/6); without keel (6/6); 7-8 -veined (1/6), or 9 -veined (3/6), or 10 -veined (1/6), or 11 -veined (2/6), or 12 -veined (1/6), or 13 -veined (3/6). Lemma surface smooth (4/6), or scabrous (2/6); glabrous (5/6), or puberulous (1/6). Lemma apex acute (1/6), or acuminate (4/6), or cuspidate (1/6). Palea 1 length of lemma; membranous (3/6), or coriaceous (3/6); 6-7 -veined (1/4), or 11-13 -veined (2/4). Palea keels eciliate (1/6), or ciliolate (4/6), or ciliate (1/6). Palea surface glabrous (5/6), or pubescent (1/6). Palea apex dentate (1/1); muticous (3/6), or with excurrent keel veins (3/6). Apical sterile florets resembling fertile though underdeveloped (6/6). FLOWER Lodicules 3 (6/6); ciliate (6/6). Anthers 3 (6/6). Stigmas 2 (1/6), or 3 (5/6). Ovary unappendaged (5/6), or umbonate (1/6); glabrous (3/3). FRUIT Caryopsis with adherent pericarp (6/6). DISTRIBUTION Europe (1), or Temperate Asia, or Australasia (1).

  Bibliography

  • 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
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
  • C See http://kew.org/about-kew/website-information/legal-notices/index.htm You may use data on these Terms and Conditions and on further condition that: The data is not used for commercial purposes; You may copy and retain data solely for scholarly, educational or research purposes; You may not publish our data, except for small extracts provided for illustrative purposes and duly acknowledged; You acknowledge the source of the data by the words "With the permission of the Trustees of the Royal Botanic Gardens, Kew" in a position which is reasonably prominent in view of your use of the data; Any other use of data or any other content from this website may only be made with our prior written agreement.