Lachnagrostis lyallii (Hook.f.) Zotov
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Lachnagrostis lyallii (Hook.f.) Zotov, Rec. Domin. Mus. 5: 142 (1965)
Lachnagrostis lyallii (Hook.f.) Zotov
Nomenclature
(Hook.f.) Zotov
Hook.f.
Zotov
1965
142
ICN
species
Lachnagrostis lyallii
Classification
Synonyms
Descriptions
Lachnagrostis lyallii (Hook.f.) Zotov
2n = 98
2n = 98
Lachnagrostis lyallii (Hook.f.) Zotov
Lax, sometimes stoloniferous, perennial tufts, (5)- 10-50 cm tall, with wide, flat, or narrow and folded, light or dull green leaves, and lax panicles often large in proportion to the plant; innovations extravaginal; short plants with narrow involute leaves may be more densely tufted. Leaf-sheaths submembranous, distinctly nerved, smooth, or minutely scabrous above, green to creamy brown, sometimes purplish; ligule 0.6-4 mm, ovate-oblong, denticulate to later ± lacerate at ± truncate tip, minutely scabrous abaxially; leaf-blades 2-15 cm × 0.3-3.5-(6) mm, flat or folded, abaxially smooth to finely scabrous on nerves throughout or near tip, adaxially finely scabrous on nerves, margins minutely scabrous, tip subacute. Culms 3-25-(45) cm tall, erect or geniculate at base, longer culms projecting beyond uppermost sheaths, usually finely scabrous just below panicle. Panicle 4-25 × 1-16 cm, very lax, or sometimes contracted after flowering, with widely spreading, finally horizontal branches; branchlets rather few, very finely, ± sparsely scabrous, with 1- 2-several spikelets at tips. Spikelets 2.3-4.5-(5) mm, pale green to light straw-coloured, greenish brown or purplish. Glumes subequal, ovate-elliptic or narrowly elliptic-lanceolate, acute, midnerve and hyaline margins scabrous near tip or in upper ½. Lemma (1.5)-2-2.5-(2.8) mm, ½-¾ length of glumes, 5-nerved, with numerous to scattered short fine hairs, or the upper 1/3 ± glabrous, or sometimes lemma almost completely glabrous, elliptic-oblong, truncate, with lateral nerves slightly to obviously excurrent; awn (1.7)-2-6 mm, geniculate, ± middorsal. Palea c. ½ length to almost = lemma, keels very faint, 0.1-0.2 mm apart, tip truncate, or obtuse, or shallowly notched. Callus hairs moderately dense, to 1 mm, to 1/3 length of lemma. Lodicules 0.7- 0.9 mm, linear, acute. Rachilla 0, or up to 1 mm, tipped by a few equally long, or longer hairs. Anthers (0.3)-0.6-1.2-(1.5) mm. Caryopsis 1.2-2 × 0.4- 0.8 mm. Endemic.
Lachnagrostis lyallii (Hook.f.) Zotov
Lax, sometimes stoloniferous, perennial tufts, (5)-10-50 cm, with wide, flat, or narrow and folded, light or dull green leaves, and lax panicles often large in proportion to the plant; branching extravaginal; short plants with narrow involute leaves may be more densely tufted. Leaf-sheath submembranous, distinctly ribbed, smooth, or minutely scabrid above, green to creamy brown, sometimes purplish. Ligule 0.6-4 mm, ovate-oblong, ± truncate, denticulate to later ± lacerate, abaxially minutely scabrid. Leaf-blade 2-15 cm × 0.3-3.5-(6) mm, flat or folded, abaxially smooth to finely scabrid on ribs throughout or near tip, adaxially finely scabrid on ribs; margins minutely scabrid, tip subacute. Culm 3-25-(45) cm, erect or geniculate at base, longer culms projecting beyond uppermost sheaths, internodes usually finely scabrid below panicle. Panicle 4-25 × 1-16 cm, very lax or sometimes contracted after flowering, with widely spreading, finally horizontal branches; branches rather few, very finely, ± sparsely scabrid, with 1-2-several spikelets at branchlet-tips. Spikelets 2.3-4.5-(5) mm, pale green to light straw-coloured, greenish brown or purplish. Glumes subequal, ovate-elliptic or narrowly elliptic-lanceolate, acute, midnerve and hyaline margins scabrid near tip or in upper ½. Lemma (1.5)-2-2.5-(2.8) mm, ½-¾ length of glumes, 5-nerved, with numerous to scattered short fine hairs, sometimes almost completely glabrous, or the upper ⅓ ± glabrous, elliptic-oblong, truncate, lateral nerves slightly to obviously excurrent; awn (1.7)-2-6 mm, geniculate, ± middorsal. Palea c. ½ length to ≈ lemma, keels very faint, 0.1-0.2 mm apart, apex truncate, or obtuse, or shallowly notched. Callus hairs moderately dense, to 1 mm, to ⅓ length of lemma. Rachilla prolongation 0, or up to 1 mm, tipped by a few equally long, or longer hairs. Lodicules 0.7-0.9 mm, linear, acute. Anthers (0.3)-0.6-1.2-(1.5) mm. Caryopsis 1.2-2 × 0.4-0.8 mm. Plate 6B.
Taxonomic concepts
Agrostis lyallii Hook.f.
Lachnagrostis lyallii (Hook.f.) Zotov
Deyeuxia forsteri var. lyallii (Hook.f.) Hack
Lachnagrostis lyallii (Hook.f.) Zotov
Deyeuxia forsteri var. semiglabra Hack.
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis filiformis var. semiglabra (Hack.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Lachnagrostis lyallii (Hook.f.) Zotov
Collections
Identification keys
Metadata
2a2ba629-81a8-4fa1-b5b7-6b8abc139d6e
scientific name
Names_Plants
1 January 2000
29 July 2005