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Cloud grass
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Monocots
(unranked):
Commelinids
Order:
Poales
Family:
Poaceae
Genus:
Agrostis
Species:
A. nebulosa
Binomial name
Agrostis nebulosa

Agrostis nebulosa (cloud grass) is a rare annual grass native to Portugal, Spain and North Africa. As an ornamental plant it is often cultivated for its light, delicate heads that are used dried in floristry. As a garden plant it is recommended for open, sunny positions in USDA hardiness zones 5–7, where it may self-seed if suited.[1]

Description edit

Habit: annual herb. Culms (stems) erect, or rising with knee-like bends, to 25–50 cm tall; glabrous (smooth); with 2–3 nodes. Leaf-sheaths slightly rough, but smooth-surfaced. Leaves with a 2–3 mm ligule, oblong, blunt-toothed, leaf-blade 3–10 cm × 1–3 mm or 3.5 mm wide, flat, with a rough surface. Inflorescence: an open, ovate panicle, 12–20 cm long × 6–10 wide; lax and diffuse, much branched and subdivided, main branches dividing 10–15 times, whorled at most nodes, pedicels almost smooth. Spikelets solitary; fertile spikelets held on clavate (noticeably thicker at the apex) pedicels, 5–12 long, 2–7 times longer than the spikelets. Fertile spikelets: spikelets elliptic, 1–1.7 mm, laterally compressed (flattened), comprising 1 fertile floret, without rhachilla extension. They break up when mature, falling apart below each fertile floret, leaving a smooth callus. Glumes persistent, similar, exceeding the apex of the florets; firmer than the fertile lemma they are shiny and gaping. Both upper and lower glumes are lanceolate, 1.3–1.7 long; apex obtuse or subacute, with scarious (thin, dry, membranaceous) margin, a single vein and a single keel, with some bristles. Florets: fertile lemma elliptic, 0.4–0.6 or 0.8 mm, up to one third the length of the glumes, truncate-toothed, with 5 lateral veins almost reaching apex, glabrous, usually muticous (without an awn, spine or point), rarely with a dorsal ridge of 2 mm, geniculate (knee-like), and inserted near the base. Palea at least two thirds the length of the lemma; hyaline (glassy; transparent). Flower: with two lodicules and three Anthers, c. 1 mm long. Flowering in June–July. Fruit: a caryopsis 1 × 0.4 mm, transversely rough. Hilum linear. [2][3]

Distribution and habitat edit

A rare species, it is found in grasslands at higher elevations in the Iberian Peninsula and North Africa.

As an introduction it has been found growing in the wild in Argentina (1926), north-eastern Canada (1908) and several times in the western United States of America (1877, 1889 etc).

Taxonomy edit

Agrostis nebulosa was described by Boiss. & Reut. and published in Diagnoses Plantarum Novarum Hispanicarum 26. 1842.[4]

Cytology

Number of chromosomes of Agrostis nebulosa (Fam. Gramineae) and infraspecific taxa: n=7+1B[5][6]

Etymology
  • Agrostis: generic name derived from Greek agrostis = (a forage plant or sort of grass), cf. agros = (a field).[7]
  • nebulosa: epithet derived from Latin meaning "cloudy";[8] (also "resembling mist; vaporous; misty, foggy").[9]
Synonymy
  • Neoschischkinia nebulosa (Boiss. & Reut.) Tzvelev[10]
  • Agrostis capillaris hort non L.Cite error: There are <ref> tags on this page without content in them (see the help page).
  • Agrostis elegans Thore[11]

Common names edit

  • English: cloud grass,[1] ornamental cloud grass[12]
  • Spanish (Castilian): algarabía, algarabías, barreplatos, barresantos, ceacilla, ceacillo, ceacinas, cecilia, ciacillo, ciacina, cosquillinas, escoba barresantos, escobas de polvillo, escobilla, escobillas, heno, mijo, plumeros, polvillo, vallico.[13]

See also edit

References edit

  1. ^ a b Lucas, Neil (2011). Designing With Grasses, p170. Timber Press, Portland, Oregon, ISBN 978-0-88192-983-6.
  2. ^ Clayton, WD, Vorontsova, M, Harman KT, & Williamson H. "Agrostis nebulosa". GrassBase - The Online World Grass Flora. Royal Botanic Gardens, Kew. Retrieved 8 October 2014.{{cite web}}: CS1 maint: multiple names: authors list (link)
  3. ^ Castroviejo & al. (eds.). "Agrostis nebulosa". Flora Vascular. Real Jardín Botánico. Retrieved 8 October 2014. {{cite web}}: |author= has generic name (help)
  4. ^ "Agrostis nebulosa Boiss & Reut". Tropicos.org. Missouri Botanical Garden. Retrieved 8 October 2014.
  5. ^ Romero, Zarco, C & Devesa, JA (1983). "Números cromosómicos para la flora española", 276–283. Lagascalia 12(1): 124-128
  6. ^ "Agrostis nebulosa Boiss & Reut. IPCN Chromosome Reports". Tropicos.org. Missouri Botanical Garden. Retrieved 8 October 2014.
  7. ^ Watson L, Dallwitz MJ. "The grass genera of the world: descriptions, illustrations, identification, and information retrieval; including synonyms, morphology, anatomy, physiology, phytochemistry, cytology, classification, pathogens, world and local distribution, and references". The Grass Genera of the World. Retrieved 8 October 2014.
  8. ^ Dictionary of Botanical Epithets
  9. ^ www.latin-dictionary.net
  10. ^ "Agrostis nebulosa". World Checklist of Selected Plant Families. Retrieved 8 October 2014.
  11. ^ Quattrocchi, Umberto (2006). CRC World Dictionary of Grasses, Common Names, Scientific Names, Eponyms, Synonyms & Etymology, Vol 1 A–D, p61. Taylor & Francis Group, ISBN 978-0-8493-1303-5.
  12. ^ "RHS Agrostis nebulosa". Royal Horticultural Society website: RHS Plant Finder. Retrieved 8 October 2014. {{cite web}}: Cite has empty unknown parameter: |1= (help)
  13. ^ "Agrostis nebulosa". Anthos (Real Jardín Botánico: Proyecto Anthos). Retrieved 8 October 2014.

Bibliography edit

Bailey, L.H. & E.Z. Bailey. 1976. Hortus Third i–xiv, 1–1290. MacMillan, New York.

Hitchcock, A. S. 1951. Man. Grasses U.S. (ed. 2) 1–1051. U.S. Department of Agriculture, Washington, D.C.

Rúgolo de Agrasar, Z. E. & A. M. Molina. 1997. The species of the genus Agrostis L. (Gramineae: Agrostideae) from Chile. Gayana, Bot. 54(2): 91–156.

Soreng, R. J. & P. M. Peterson. 2003. Agrostis. 48: 42–89. In R. J. Soreng, P. M. Peterson, G. Davidse, E. J. Judziewicz, F. O.

Zuloaga, T. S. Filgueiras & O. N. Morrone (eds.) Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae, Contr. U.S. Natl. Herb.. Smithsonian Institution, Washington, D.C.

Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. N. Morrone. 2003 and onwards. On-line taxonomic novelties and updates, distributional additions and corrections, and editorial changes since the four published volumes of the Catalogue of New World Grasses (Poaceae) published in Contr. U.S. Natl. Herb. vols. 39, 41, 46, and 48. http://www.tropicos.org/Project/CNWG:. In R. J. Soreng, G. Davidse, P. M. Peterson, F. O. Zuloaga, T. S. Filgueiras, E. J. Judziewicz & O. N. Morrone (eds.) Internet Cat. New World Grasses. Missouri Botanical Garden, St. Louis.

Wiersema, J. H. & B. León. 1999. Catalog of Economic Plants. 1–749. In World Econonic Pl.. CRC Press, Washington, D.C.

Zuloaga, F. O., E. G. Nicora, Z. E. Rúgolo de Agrasar, O. N. Morrone, J. F. Pensiero & A. M. Cialdella. 1994. Catálogo de la familia Poaceae en la República Argentina. Monogr. Syst. Bot. Missouri Bot. Gard. 47: 1–178.

Zuloaga, F. O., O. N. Morrone, M. J. Belgrano, C. Marticorena & E. Marchesi. (eds.) 2008. Catálogo de las plantas vasculares del Cono Sur. Monogr. Syst. Bot. Missouri Bot. Gard. 107: 3 Vols., 3348 p.

External links edit

 
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nebulosa Category:Annual plants Category:Plants described in 1842

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