Difference between revisions of "Swallenia"

Soderstr. & H.F. Decker
Treatment appears in FNA Volume 25. Treatment on page 24.
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name=Swallenia
 
name=Swallenia
|author=
 
 
|authority=Soderstr. & H.F. Decker
 
|authority=Soderstr. & H.F. Decker
 
|rank=genus
 
|rank=genus
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|publication year=
 
|publication year=
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V25/V25_32.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V25/V25_32.xml
 
|subfamily=Poaceae subfam. Chloridoideae
 
|subfamily=Poaceae subfam. Chloridoideae
 
|tribe=Poaceae tribe Cynodonteae
 
|tribe=Poaceae tribe Cynodonteae

Latest revision as of 17:58, 11 May 2021

Plants perennial; clumped, rhizomes woody. Culms 10-60 cm, branched above the base. Leaves mostly basal; auricles absent; ligules of hairs; blades flat, strongly veined, sharply pointed. Inflorescences terminal, usually exceeding the upper leaves, contracted panicles; branches ascend¬ing to erect; disarticulation beneath the caryopses. Spikelets laterally compressed, unawned, with 3-7 bisexual florets, distal florets reduced. Glumes subequal, longer than the adjacent lemmas but exceeded by the distal florets, acuminate; lower glumes 5-7-veined; upper glumes 7-11-veined; calluses hairy; lemmas membranous to papery, 5-7-veined, densely villous on the margins, sometimes also between the veins, unawned to mucronate; paleas equaling or exceed¬ing the lemmas; anthers 3. Caryopses falling free from the lemma and palea. x = 10.

Discussion

Swallenia is a monotypic genus, endemic to California. It is unusual in that only its caryopses break off the plant.