Difference between revisions of "Poaceae tribe Nardeae"
FNA>Volume Importer |
imported>Volume Importer |
||
| (4 intermediate revisions by 2 users not shown) | |||
| Line 15: | Line 15: | ||
-->{{Treatment/Body | -->{{Treatment/Body | ||
| − | |discussion=<p>There is only one genus, Nardus, in the Nardeae. Its relationships are obscure. Embryo characters, ligule texture, and DNA sequence data suggest it belongs in the Pooideae; the bicellular microhairs suggest a bambusoid or arundinoid affiliation. Its inclusion here in the Pooideae reflects the findings of the Grass Phylogeny Working Group (2001).</p> | + | |discussion=<p>There is only one genus, <i>Nardus</i>, in the Nardeae. Its relationships are obscure. Embryo characters, ligule texture, and DNA sequence data suggest it belongs in the Pooideae; the bicellular microhairs suggest a bambusoid or arundinoid affiliation. Its inclusion here in the Pooideae reflects the findings of the Grass Phylogeny Working Group (2001).</p> |
|tables= | |tables= | ||
|references={{Treatment/Reference | |references={{Treatment/Reference | ||
| Line 41: | Line 41: | ||
|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_68.xml |
|subfamily=Poaceae subfam. Pooideae | |subfamily=Poaceae subfam. Pooideae | ||
|tribe=Poaceae tribe Nardeae | |tribe=Poaceae tribe Nardeae | ||
Latest revision as of 16:24, 11 May 2021
Plants perennial; cespitose. Culms annual, to 60 cm; internodes hollow. Sheaths open, margins not fused; collars glabrous, without tufts of hair at the sides; auricles absent; ligules scarious, not ciliate, those of the upper and lower cauline leaves usually similar; pseudopetioles not present; blades filiform, venation parallel, cross venation not evident, secondary veins parallel to the midvein; cross sections non-Kranz, without arm or fusoid cells, adaxial epidermes with bicellular microhairs, not papillate. Inflorescences terminal spikes, 1-sided, spikelets solitary, radial to the rachises; rachises with the spikelets partially embedded. Spikelets not compressed, triangular in cross section, with 1 floret, floret bisexual; rachillas not prolonged beyond the floret base; disarticulation above the glumes, beneath the floret. Glumes absent or vestigial; lower glumes a cupular rim; upper glumes absent or vestigial; florets 5-10 mm, not compressed; calluses poorly developed, glabrous; lemmas chartaceous, 3-veined, angled over the veins, most strongly so over the lateral veins, apices entire, awned, awns terminal, not branched, lemma-awn transition gradual, not evident; paleas subequal to the lemmas, hyaline, 2-keeled; lodicules absent; anthers 3; ovaries glabrous; styles 1. Caryopses fusiform, style bases not persistent; hila linear, more than 1/2 as long as the caryopses; embryos about 1/6 the length of the caryopses. x = 13.
Discussion
There is only one genus, Nardus, in the Nardeae. Its relationships are obscure. Embryo characters, ligule texture, and DNA sequence data suggest it belongs in the Pooideae; the bicellular microhairs suggest a bambusoid or arundinoid affiliation. Its inclusion here in the Pooideae reflects the findings of the Grass Phylogeny Working Group (2001).