Lachnagrostis filiformis (G.Forst.) Trin.
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Lachnagrostis filiformis (G.Forst.) Trin., Fund. Agrost. (Trinius) 128, t. 10 (1820)
Lachnagrostis filiformis (G.Forst.) Trin.
Nomenclature
(G.Forst.) Trin.
G.Forst.
Trin.
1820
128, t. 10
ICN
species
Lachnagrostis filiformis
Classification
Subordinates
Vernacular names
Synonyms
- Agrostis avenacea J.F.Gmel.
- Agrostis filiformis (G.Forst.)Spreng
- Agrostis forsteri Roem. & Schult.
- Agrostis solandri F.Muell.
- Avena filiformis G.Forst.
- Calamagrostis filiformis (G.Forst.) Cockayne
- Deyeuxia filiformis (G.Forst.) Petrie
- Deyeuxia forsteri (Roem. & Schult.) Kunth
- Lachnagrostis avenacea (J.F.Gmel.) Veldkamp
- Lachnagrostis filiformis (G.Forst.) Trin. var. filiformis
- Lachnagrostis forsteri (Roem. & Schult.) Trin.
Descriptions
Lachnagrostis filiformis (G.Forst.) Trin.
n = 28 bivalents
2n = 56
2n = 56
Lachnagrostis filiformis (G.Forst.) Trin.
Open, bluish green or light green, annual or shortlived perennial tufts, (12)-20-70 cm tall, whole plant often withering early and culms not breaking up below panicle; innovations intravaginal. Leafsheaths firmly membranous, distinctly nerved, glabrous below, very finely scabrous above, light green, later light brown; ligule (1)—2—5 mm, oblong, rounded across top or tapered, later lacerate, abaxially with sparse prickle teeth; leaf-blades 2.5- 8—(18) cm × 1.5-3 mm, usually flat, sometimes involute and 0.5-1 mm diam., both surfaces glabrous or scabrous on nerves, margins very finely scabrous, tip fine, acute. Culms 10-35 cm tall, erect to spreading, usually densely, minutely scabrous, occasionally glabrous. Panicle 9-30 × (0.5)-2-25 cm, delicate, enclosed at the base by the uppermost leaf sheath, at first contracted, later very lax; branchlets filiform, numerous, unequal, very finely scabrous, the main branchlets naked for much of their length, with spikelets in clusters of 2-several, towards tips of the much shorter capillary secondary branchlets. Spikelets 2.5-3.5-(4.2) mm, pale silvery green to purplish. Glumes subequal, acute to acuminate, with the lower glume usually slightly longer and more acuminate, very narrow linear-lanceolate, keel scabrous almost to base, elsewhere usually smooth, membranous. Lemma 1.3—2—(2.3) mm, ½-2/3 length of glumes, 5- nerved, moderately covered with very short hairs, oblong-ovate, glabrous near hyaline, truncate, erose tip, lateral nerves very shortly excurrent; awn 3 - 6 mm, geniculate, + mid-dorsal or from c. upper 1/3. Palea ¾-4/5 lemma, keels c. 0.1 mm apart, tip subobtuse. Callus with dense ring of minute hairs 0.3- 0.4 mm, to ¼ length of lemma. Lodicules 0.5- 0.9 mm, linear, acute. Rachilla 0, or to c. 0.3 mm tipped with hairs to c. 0.8 mm. Anthers 0.2-0.5 mm. Caryopsis 0.8-1.3 × 0.3-0.5 mm. Also indigenous to Australia, New Guinea, and Easter I.; naturalised in South America, South Africa, and Malesia.
Lachnagrostis filiformis (G.Forst.) Trin.
Open, bluish green or light green, annual or short-lived perennial tufts, (12)-20-70 cm, whole plant often withering early and culms not breaking up below panicle; branching intravaginal. Leaf-sheath firmly membranous, distinctly ribbed, glabrous below, very finely scabrid above, light green, later light brown. Ligule (1)-2-5 mm, oblong, rounded or tapered, later lacerate, abaxially with sparse prickle-teeth. Leaf-blade 2.5-8-(18) cm × 1.5-3 mm, usually flat, sometimes involute and 0.5-1 mm diam., glabrous, or ribs scabrid; margins very finely scabrid, tip fine, acute. Culm 10-35 cm, erect to spreading, internodes usually densely, minutely scabrid, occasionally smooth. Panicle 9-30 × (0.5)-2-25 cm, delicate, enclosed at base by the uppermost leaf-sheath, at first contracted, later very lax; branches filiform, numerous, unequal, very finely scabrid, primary branches naked for much of their length, with spikelets in clusters of 2-several, towards tips of the much shorter capillary secondary branchlets. Spikelets 2.5-3.5-(4.2) mm, pale silvery green to purplish. Glumes subequal, acute to acuminate, usually glabrous, membranous, very narrow linear-lanceolate, lower glume usually slightly longer and more acuminate; keel scabrid almost to base. Lemma 1.3-2-(2.3) mm, ½-⅔ length of glumes, 5-nerved, moderately covered with very short hairs, oblong-ovate, glabrous near hyaline, truncate, erose apex, lateral nerves very shortly excurrent; awn 3-6 mm, geniculate, ± middorsal or from c. upper ⅓. Palea ¾-⅘ length of lemma, keels c. 0.1 mm apart, apex subobtuse. Callus ringed by minute hairs 0.3-0.4 mm, to ¼ length of lemma. Rachilla prolongation 0, or to c. 0.3 mm tipped with hairs to c. 0.8 mm. Lodicules 0.5-0.9 mm, linear, acute. Anthers 0.2-0.5 mm. Caryopsis 0.8-1.3 × 0.3-0.5 mm.
Taxonomic concepts
Agrostis avenacea J.F.Gmel.
Lachnagrostis filiformis (G.Forst.) Trin.
Agrostis filiformis (G.Forst.)Spreng
Lachnagrostis filiformis (G.Forst.) Trin.
Agrostis forsteri Roem. et Schult.
Lachnagrostis filiformis (G.Forst.) Trin.
Agrostis solandri F.Muell.
Lachnagrostis filiformis (G.Forst.) Trin.
Avena filiformis G.Forst.
Lachnagrostis filiformis (G.Forst.) Trin.
Calamagrostis filiformis (G.Forst.) Cockayne
Lachnagrostis filiformis (G.Forst.) Trin.
Deyeuxia filiformis (G.Forst.) Petrie
Lachnagrostis filiformis (G.Forst.) Trin.
Deyeuxia forsteri (Roem. et Schult.) Kunth
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis avenacea (J.F.Gmel.) Veldkamp
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin. var. filiformis
Lachnagrostis filiformis (G.Forst.) Trin.
Lachnagrostis forsteri (Roem. et Schult.) Trin.
Lachnagrostis filiformis (G.Forst.) Trin.
Collections
Identification keys
Metadata
0ffcf6b7-9800-4c52-a681-d957a860c4e9
scientific name
Names_Plants
1 January 2000
14 July 2016