Rytidosperma biannulare (Zotov) Connor & Edgar
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Rytidosperma biannulare (Zotov) Connor & Edgar, New Zealand J. Bot. 17: 324 (1979)
Rytidosperma biannulare (Zotov) Connor & Edgar
Nomenclature
Connor & Edgar
Zotov
(Zotov) Connor & Edgar
1979
324
ICN
species
Rytidosperma biannulare
Classification
Descriptions
Rytidosperma biannulare (Zotov) Connor & Edgar
Narrow-leaved green tussocks, leaves much < culms; new shoots intravaginal. Sheaths pale stramineous, often purpled above, glabrous; collar hairs to 1.7 mm long, sparse or lacking; ligule 0.3- 0.5 mm long; lamina up to 30-(40) cm long, usually rolled, ± glabrous at maturity, young leaves with scattered long, fine, silky hairs, margins and tip scabrous. Culms up to 85 cm tall, glabrous. Panicle often rather dense, strict, 10-(20) cm long, branches short, with many spikelets on slender pedicels, or panicle smaller with few spikelets; rhachis and pedicels densely short-scabrous, occasionally with slightly longer hair at branch axils; spikelets 6-7- flowered, awns usually exserted from glumes. Glumes purple-margined, lanceolate, subacute, 7.6-11-(13.2)mm long, ± equal, lower 5-7-nerved, upper 5-nerved. Lemma 1.8-2.2-(2.8) mm long, 7-9- nerved, upper and lower rows of hairs dense, continuous, upper row < or occasionally almost = lemma lobes, lower row usually not reaching base of upper, sometimes not well-defined, elsewhere with numerous short scattered hairs, glabrous at times just below upper row, margins hair-fringed; lemma lobes (3.5)—4—5-(8.5) mm long, narrowed to fine awn, adaxially often with a few longer hairs at base. Central awn (6)-7-9.5-(12.5) mm long; column 2.5- 3 mm long, = upper lemma hairs, much > palea. Palea (2.5)-2.7-3.3-(4.6) mm long, much < upper lemma hairs, hairs few, short at base between keels, margins usually long-hairy. Callus 0.5-0.7 mm long, marginal hair tufts reaching to base of lower lemma hairs. Rhachilla 0.3-0.4 mm long. Anthers 0.8-1.5 mm long. Caryopsis 1.2-1.9 × 0.6-0.8 mm; embryo 0.5-0.8 mm long; hilum 0.3-0.6 mm long. Endemic.
Rytidosperma biannulare (Zotov) Connor & Edgar
2n = 48
Rytidosperma biannulare (Zotov) Connor & Edgar
Narrow-leaved green tussocks, leaves much < culms; branching intra-vaginal. Leaf-sheath pale stramineous, often purplish above, glabrous; apical tuft of hairs to 1.7 mm, sparse or lacking. Ligule 0.3-0.5 mm. Leaf-blade to 30-(40) cm, usually rolled, ± glabrous at maturity, young leaves with scattered long, fine, silky hairs, margins and tip scabrid. Culm to 85 cm, internodes glabrous. Panicle often rather dense, strict, 10-(20) cm, branches short, of many spikelets on slender pedicels, or panicle smaller and fewer spikelets; rachis and pedicels densely short-scabrid, occasionally slightly longer hairs at branch axils. Spikelets 6-7-flowered, awns usually exserted from glumes. Glumes purple-margined, lanceolate, subacute, 7.6-11-(13.2) mm, ± equal; lower 5-7-nerved, upper 5-nerved. Lemma 1.8-2.2-(2.8) mm, 7-9-nerved, upper and lower rows of hairs dense, continuous, upper row ≤ lemma lobes, lower row usually not reaching base of upper, sometimes not well-defined, elsewhere numerous short scattered hairs, glabrous at times just below upper row, margins hair-fringed; lobes (3.5)-4-5-(8.5) mm, narrowed to fine awn, adaxially often a few longer hairs at base; central awn (6)-7-9.5-(12.5) mm, column 2.5-3 mm = upper lemma hairs » palea. Palea (2.5)-2.7-3.3-(4.6) mm, « upper lemma hairs, interkeel hairs few, short at base, margins usually long-hairy. Callus 0.5-0.7 mm, marginal hair tufts reaching to base of lower lemma hairs. Rachilla 0.3-0.4 mm. Anthers 0.8-1.5 mm. Caryopsis 1.2-1.9 × 0.6-0.8 mm; embryo 0.5-0.8 mm; hilum 0.3-0.6 mm. Plate 11C.
Leaf blade rather narrow, folded ± terete, glabrous to sparsely short hairy; glumes c. 10 mm long with rose-purple lateral stripes; upper transverse series of long hairs shorter than lateral lobes; lower series distinct.
Folii lamina angustior, plicata, ± teres, glabra vel sparse minuteque pubescens; glumae c. 10 mm longae virgis rubro-purpureis lateralibus; superior transversa series pilorum longorum lateralibus lobis brevior; series inferior distincta.
Taxonomic concepts
Austrodanthonia biannularis (Zotov) H.P.Linder
Rytidosperma biannulare (Zotov) Connor & Edgar
Notodanthonia biannularis Zotov
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
Rytidosperma biannulare (Zotov) Connor & Edgar
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Identification keys
Metadata
b1c4cc8d-4dc3-45cf-ae26-392b6645725a
scientific name
Names_Plants
1 January 2000
22 March 2007