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Lachnagrostis Trin.

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Lachnagrostis Trin., Fund. Agrost. (Trinius) 128, t. 10 (1820)
Lachnagrostis Trin.

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Indigenous, non-endemic
Wild
New Zealand
Political Region

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Trin.
Trin.
1820
128, t. 10
ICN
Lachnagrostis Trin.
genus
Lachnagrostis

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Lachnagrostis

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Lachnagrostis Trin.

Tufted perennials, sometimes short-lived, or annuals; innovations intra- or extravaginal. Leaf-sheaths rounded at back; ligule membranous; leaf-blades flat, or folded with inrolled margins. Culms erect or geniculately ascending, fragile at maturity; nodes glabrous. Inflorescence a lax, often delicately branched panicle; at maturity completely detached from the plant together with a fragment of the uppermost culm internode, or, in annual plants, soon withering and persisting. Spikelets small, 1- or occasionally 2-flowered, laterally compressed; rachilla disarticulating above glumes, often prolonged, tipped with soft hairs and almost equalling the palea, or rachilla prolongation minute and glabrous or not visible under the light microscope. Glumes ± equal and equalling the spikelet, ovate-elliptic to lanceolate, acute, membranous, often shining, 1-(3)-nerved, with the outer nerves, if present, very short, keel ± scabrous. Lemma < and thinner in texture than glumes, rarely (L. tenuis) ± = glumes and firmer, elliptic-oblong, truncate, rounded at back, (3)-5-nerved, often denticulate and with lateral nerves minutely excurrent, usually with dense or sparse, soft, fine hairs, or sometimes hairless, rarely (L. tenuis) finely scabrous; awn dorsal, finely scabrous, geniculate or straight, ± mid-dorsal or very short and from just below tip, rarely 0. Palea from ½ to c. = lemma, hyaline, with 2 usually faint keels close together at centre. Callus minute, blunt, with short, soft hairs, to ½ or rarely to 2/3 length of lemma, sometimes 0. Lodicules 2, linear to lanceolate, hyaline, glabrous. Stamens 3; anthers not penicillate. Ovary glabrous; styles distinct, free to base, short; stigmas 2, plumose. Caryopsis fusiform; embryo small; endosperm doughy or dry.

Lachnagrostis Trin.

Tufted, sometimes short-lived perennials, or annuals; branching intra- or extravaginal. Leaf-sheath rounded. Ligule membranous. Leaf-blade flat, or folded with inrolled margins. Culm erect or geniculately ascending, fragile at maturity; nodes glabrous. Inflorescence a lax, often delicately branched panicle; at maturity completely detached from the plant together with a fragment of the uppermost culm internode, or, in annual plants, soon withering and persisting. Spikelets small, 1- or occasionally 2-flowered, laterally compressed; disarticulation above glumes; rachilla often prolonged, tipped with soft hairs and almost equalling the palea, or prolongation minute and glabrous. Glumes ± equal and equalling the spikelet, ovate-elliptic to lanceolate, acute, membranous, often shining, 1-(3)-nerved, lateral nerves, if present, very short; keel ± scabrid. Lemma &lt;, and thinner in texture than glumes, rarely () ≈ glumes and firmer, elliptic-oblong, truncate, rounded, (3)-5-nerved, often denticulate and with lateral nerves minutely excurrent, usually with dense or sparse, soft, fine hairs, or sometimes glabrous, rarely (L. tenuis) finely scabrid; awn, finely scabrid, geniculate or straight, ± middorsal or very short and subapical, rarely 0. Palea from ½ to ≈ lemma, hyaline, keels 2, usually faint, close together at centre. Callus minute, blunt, with short, soft hairs, to ½ or rarely to ⅔ length of lemma, sometimes 0. Lodicules 2, linear to lanceolate, hyaline, glabrous. Stamens 3; anthers not penicillate. Ovary glabrous; styles distinct, free to base, short; stigmas 2, plumose. Caryopsis fusiform; embryo small; endosperm doughy or dry. Chasmogamous (N.Z. spp.). Fig. 9.

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Lachnagrostis Trin.
Lachnagrostis Trin.
Lachnagrostis Trin.
Lachnagrostis Trin.
Lachnagrostis Trin.
Lachnagrostis Trin.
Lachnagrostis Trin.
Lachnagrostis
Lachnagrostis Trin.

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Lachnagrostis Trin.
New Zealand
Lachnagrostis Trin.
New Zealand
Canterbury Land District
Lachnagrostis Trin.
New Zealand
Marlborough Land District
Lachnagrostis Trin.
New Zealand
Nelson Land District
Lachnagrostis Trin.
New Zealand
Southland Land District
Lachnagrostis Trin.
New Zealand
Wellington Land District
Lachnagrostis Trin.
Norfolk Island
Lachnagrostis Trin.
United Kingdom

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3ed4f4ef-9315-43f1-92b9-972ab404f0ed
scientific name
Names_Plants
1 January 2000
14 July 2016
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