Pacific Island Ecosystems at Risk (PIER)

  [   PIER species lists  ]   [   PIER home  ]

Chusquea culeou
E. Desv., Poaceae
Click on an image for links to BIGGER PICTURES


Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

Spanish: caña coligüe, caña colihue, coleu, colihue, matorral de colihue

Habit:  grass

Description:  "Perennial. Culms erect; 100-700 cm long; woody; without nodal roots. Culm-internodes terete; solid; smooth. Lateral branches dendroid. Branch complement several; in a clump; with 1 branch dominant; thinner than stem. Leaf-sheaths longer than adjacent culm internode. Ligule an eciliate membrane; obtuse. Leaf-blade base with a brief petiole-like connection to sheath; petiole glabrous. Leaf-blades deciduous at the ligule; lanceolate; revolute; 2.5-8 cm long; 4-8 mm wide; coriaceous; stiff. Leaf-blade midrib evident. Leaf-blade venation with distinct cross veins. Leaf-blade surface glabrous. Leaf-blade margins cartilaginous; scabrous. Leaf-blade apex pungent.  Inflorescence a panicle. Panicle contracted; oblong; 3-6 cm long; 1.5-2 cm wide. Primary panicle branches bearing 1-3 fertile spikelets on each lower branch. Panicle axis pubescent. Spikelets solitary. Fertile spikelets pedicelled. Fertile spikelets: Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 6-8 mm long; breaking up at maturity; disarticulating below each fertile floret. Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1.5-2 mm long; 0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse, or acute. Upper glume ovate; 2.5-3 mm long; 0.33 length of adjacent fertile lemma; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse, or acute. Basal sterile florets similar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret ovate; 0.66 length of fertile lemma; chartaceous; purple; 3 -veined; pubescent; hairy above; acuminate; muticous, or mucronate. Lemma of upper sterile floret ovate; 6-8.5 mm long; 1.5 length of lower sterile floret; chartaceous; pubescent; acuminate; muticous, or mucronate. Fertile lemma ovate; 6-8 mm long; coriaceous; purple; without keel; 9-10 -veined. Lemma lateral veins with cross-veins. Lemma surface pubescent. Lemma apex obtuse; muticous, or mucronate. Flower: Lodicules 3; 1.2-1.7 mm long; membranous; veined; ciliate. Anthers 3; 5 mm long. Stigmas 2. Caryopsis with adherent pericarp; 4-6 mm long; light brown; apex unappendaged"  (GrassBase - The Online World Grass Flora).

Habitat/ecology:  "In Chile this species grows in the following environmental conditions:  Low altitude, interior valleys; medium altitude up to the timber line; high altitude close to the timber line.  Somewhat dry areas where the drought may last 3-5 months, precipitations of 400-800 mm. are concentrated in winter; humid areas, with almost constant rainfall, short dry periods are possible (generally not longer than 1 month).  Fully exposed to the sun, level areas or slopes facing north"  (Chileflora).

Propagation:  Seed

Native range:  Argentina and Chile (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
invasive
cultivated
Atkinson, Rachel/Sawyer, John (2011)
Chile (offshore islands)
Juan Fernández Islands
Isla Más a Tierra (Robinson Crusoe Island) introduced
cultivated
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (pp. 478, 524, 552)
Voucher cited: Danton I(5/288)1633. "En RC, ésta presente en algunos jardines del pueblo de San Juan Bautista".
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Chile (continental)
Chile
Chile (Republic of) native
cultivated
U.S. Dept. Agr., Agr. Res. Serv. (2013)
La Araucania, Los Lagos


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

  [   PIER species lists  ]   [   PIER home  ]

This page was created on 15 DEC 2010 and was last updated on 10 JAN 2011.