Poa glauca Vahl

Glaucous bluegrass (en), Koélérie glauque (fr), Koelérie des sables (fr)

Species

Angiosperms > Poales > Poaceae > Poa

Characteristics

Culms erect, glaucous, sometimes strongly purplish, (5–) 10–15(–35) cm tall, nodes 1 or 2, uppermost to 1/5 way up culm, covered by sheath; uppermost internode up to 1.5–2 mm wide. Shoots always extravaginal, even when densely tufted. Leaf sheath longer than blade, flat or folded, sometimes quite soft, withering, 1–2 mm wide, margins and both sides of veins scabrid; ligule 1–1.5(–2) mm. Panicle contracted, later quite open, 4–7 cm; branches 1 or 2 per node, 2–3 cm, with a few scattered spikelets. Spikelets oblong-ovate, (3.8–)4–5(–7) mm, tinged with purple, florets 2–4; glumes narrowly lanceolate, unequal, as long as lower lemma; lemma narrowly lanceolate, lower lemma ca. 4 mm, keel shortly villous for 1/2 of length, marginal veins for 1/3; callus sparsely webbed or glabrous. Fl. Jun–Aug.
More
Culms clustered, 2–5 dm, erect, without rhizomes; lvs glaucous, lax, 1–3 mm wide, the uppermost one at or below the middle of the shoot; ligule 1–2 mm; infl long-exsert, narrow, rather dense, 3–12 cm, the branches in sets of 2–5, at first ascending, later spreading, each with a few 2–4-fld spikelets; glumes lanceolate, subequal, 2.3–3.8 mm, less than half as wide; lemmas 2.5–3.5 mm, densely sericeous or villosulous on the lower half of the keel and marginal veins, not webbed, the intermediate veins obscure; rachilla puberulent at 30×; anthers 1–2.2 mm; 2n=42, 49, 56, 63, 70. Gravelly or rocky soil and cliffs; circumboreal, s. to Vt., n. Mich., and ne. Minn. (P. glaucantha; P. scopulorum)
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.35 - 0.38
Root system fibrous-root rhizome
Rooting depth (meter) 0.3
Root diameter (meter) 0.4
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 7-8
Soil humidity 1-4
Soil texture 7-8
Soil acidity -8
Soil nutriment -
Hardiness (USDA) 5-8

Usage

Uses environmental use
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -29
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Poa glauca leaf picture by Manon Bounous (cc-by-sa)

Distribution

Poa glauca world distribution map, present in Afghanistan, Austria, Switzerland, Chile, China, Colombia, Czech Republic, Spain, Finland, France, Micronesia (Federated States of), Greece, Iran (Islamic Republic of), Iceland, Italy, Japan, Kazakhstan, Kyrgyzstan, Morocco, Montenegro, Norway, Nepal, Pakistan, Poland, Korea (Democratic People's Republic of), Svalbard and Jan Mayen, Sweden, Taiwan, Province of China, United States of America, and Uzbekistan

Identifiers

LSID urn:lsid:ipni.org:names:204239-2
WFO ID wfo-0000892407
COL ID 6W3FD
BDTFX ID 50508
INPN ID 114225
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Poa cernua Poa aspera Poa conferta Poa glauca Paneion glaucum Poa ruida Poa caesia f. elatior Poa freartitis Poa seorsa Poa serotina Poa viridis Poa aspera var. laxiuscula Poa balfourii var. rigida Poa caesia var. aspera Poa caesia var. balfourii Poa caesia var. frearitis Poa caesia var. glauca Poa glauca subsp. conferta Poa glauca subsp. litwinowiana Poa glauca var. atroviolacea Poa glauca var. caesia Poa glauca var. elatior Poa glauca var. kitadakensis Poa glauca var. laxiuscula Poa misera var. alpina Poa nemoralis subsp. glauca Poa nemoralis var. glauca Poa sphondylodes var. alpina Poa tristis subsp. litwinowiana Poa glauca var. glauca Poa nemoralis var. glauca Poa glauca var. conferta Poa glauca var. anadryica

Lower taxons

Poa glauca subsp. rupicola Poa glauca subsp. altaica Poa glauca subsp. glauca Poa glauca var. firma