Difference between revisions of "Amphibromus neesii"

Steud.
Common names: Southern swamp wallabygrass
Treatment appears in FNA Volume 24. Treatment on page 704.
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|distribution=Calif.
 
|distribution=Calif.
|discussion=<p>Amphibromus neesii is an Australian species that grows on floodplains and river banks, and in marshes and lagoons. It was first reported as growing in North America in 1990; examination of the voucher specimens showed them to be A. nervosus, which differs from A. neesii in having a lower lemma awn insertion. Both species are included in this treatment to help prevent future misidentification of the two species in North America.</p>
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|discussion=<p><i>Amphibromus neesii</i> is an Australian species that grows on floodplains and river banks, and in marshes and lagoons. It was first reported as growing in North America in 1990; examination of the voucher specimens showed them to be <i>A. nervosus</i>, which differs from <i>A. neesii</i> in having a lower lemma awn insertion. Both species are included in this treatment to help prevent future misidentification of the two species in North America.</p>
 
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|references=
 
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name=Amphibromus neesii
 
name=Amphibromus neesii
|author=
 
 
|authority=Steud.
 
|authority=Steud.
 
|rank=species
 
|rank=species
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|basionyms=
 
|basionyms=
 
|family=Poaceae
 
|family=Poaceae
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|illustrator=Bee F. Gunn
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|illustration copyright=Utah State University
 
|distribution=Calif.
 
|distribution=Calif.
 
|reference=None
 
|reference=None
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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/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V24/V24_998.xml
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|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/200273ad09963decb8fc72550212de541d86569d/coarse_grained_fna_xml/V24/V24_998.xml
 
|subfamily=Poaceae subfam. Pooideae
 
|subfamily=Poaceae subfam. Pooideae
 
|tribe=Poaceae tribe Poeae
 
|tribe=Poaceae tribe Poeae

Latest revision as of 16:26, 11 May 2021

Please click on the illustration for a higher resolution version.
Illustrator: Bee F. Gunn

Copyright: Utah State University

Plants perennial; usually cespitose, occasionally rhizomatous. Culms 30-150 cm tall, 1-2.5 mm thick, erect, terete to flattened, glabrous; nodes 2-4; lowest internodes not swollen. Sheaths smooth or scabridulous, ribbed; ligules 4.5-8 mm, acute to acuminate; blades 10-20(37) cm long, 2-4 mm wide, flat or involute, smooth to scabrous, abaxial surfaces scabridulous, adaxial surfaces deeply ribbed, scabrous. Terminal panicles 15-40 cm, erect, sparse, lower portion rarely partially enclosed in the uppermost sheaths; branches usually 7-14 cm, ascending or appressed, often flexuous; pedicels usually 10-20 mm. Spikelets 8-17 mm, with 2-6 florets. Glumes unequal, green, sometimes purplish in the center, with hyaline margins; lower glumes 3.5-6.5 mm, 3-5-veined; upper glumes 4.5-7.5 mm, 5-7-veined; lemmas 5-8.4 mm, 7-veined, papillose to scabrous, apices appearing constricted, 2-4-toothed, awned from the upper 2/3 - 3/4 of the lemmas, awns 14-26 mm, geniculate and twisted; paleas 8/10 – 9/10 the length of the lemmas, papillose; anthers of chasmogamous florets 1.3-2.3 mm. 2n = unknown.

Discussion

Amphibromus neesii is an Australian species that grows on floodplains and river banks, and in marshes and lagoons. It was first reported as growing in North America in 1990; examination of the voucher specimens showed them to be A. nervosus, which differs from A. neesii in having a lower lemma awn insertion. Both species are included in this treatment to help prevent future misidentification of the two species in North America.

Selected References

None.

Lower Taxa

None.