Difference between revisions of "Aconogonon davisiae"

(W. H. Brewer ex A. Gray) Soják

Preslia 46: 151. 1974.

Common names: Davis’s knotweed
Endemic
Basionym: Polygonum davisiae W. H. Brewer ex A. Gray Proc. Amer. Acad. Arts 8: 399. 1872
Synonyms: Aconogonon newberryi (Small) Soják Polygonum newberryi Small
Treatment appears in FNA Volume 5. Treatment on page 599. Mentioned on page 598.
FNA>Volume Importer
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}}
 
}}
 
|common_names=Davis’s knotweed
 
|common_names=Davis’s knotweed
 +
|special_status={{Treatment/ID/Special_status
 +
|code=E
 +
|label=Endemic
 +
}}
 
|basionyms={{Treatment/ID/Basionym
 
|basionyms={{Treatment/ID/Basionym
 
|name=Polygonum davisiae
 
|name=Polygonum davisiae
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-->{{Treatment/Body
 
-->{{Treatment/Body
|distribution=w United States.
+
|distribution=Calif.;Idaho;Oreg.;Wash.
 
|discussion=<p>Varieties 2 (2 in the flora).</p><!--
 
|discussion=<p>Varieties 2 (2 in the flora).</p><!--
 
--><p>The varieties are largely sympatric and often intergrade. The treatment here follows Hong S. P. (1991).</p>
 
--><p>The varieties are largely sympatric and often intergrade. The treatment here follows Hong S. P. (1991).</p>
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|basionyms=Polygonum davisiae
 
|basionyms=Polygonum davisiae
 
|family=Polygonaceae
 
|family=Polygonaceae
|distribution=w United States.
+
|distribution=Calif.;Idaho;Oreg.;Wash.
 
|reference=None
 
|reference=None
 
|publication title=Preslia
 
|publication title=Preslia
 
|publication year=1974
 
|publication year=1974
|special status=
+
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V5/V5_1221.xml
+
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V5/V5_1221.xml
 
|subfamily=Polygonaceae subfam. Polygonoideae
 
|subfamily=Polygonaceae subfam. Polygonoideae
 
|genus=Aconogonon
 
|genus=Aconogonon

Revision as of 23:30, 27 May 2020

Plants 12–42(–50) cm. Stems ascending to erect, glabrous or pubescent. Leaves: ocrea reddish brown, funnelform, 0.3–3 cm, margins oblique, glabrous or finely pubescent to pilose; petiole 0.3–10(–15) mm; blade oblong-ovate to ovate, rarely broadly lanceolate, 2.1–7.5(–9.5) × 1.1–5 cm, subcoriaceous, base truncate or, rarely, cordate, margins entire, glabrous or ciliate, apex obtuse to acute, faces often glaucous, glabrous or pubescent. Inflorescences axillary, racemelike; peduncle essentially absent. Pedicels 0.5–1.9(–2.4) mm. Flowers 1–4 per ocreate fascicle, rarely some flowers with stamens poorly developed; perianth greenish to pinkish white, 2–4.5 mm; tepals slightly dimorphic or, rarely, distinctly so, oblong-ovate to obovate, apex obtuse; anthers yellow or pink. Achenes exserted, yellowish brown, not beaked distally, 3.2–6(–8.3) × 2.1–5 mm, shiny, faces not concave. 2n = 20.

Discussion

Varieties 2 (2 in the flora).

The varieties are largely sympatric and often intergrade. The treatment here follows Hong S. P. (1991).

Selected References

None.

Key

1 Faces of leaf blades pubescent, rarely glabrescent Aconogonon davisiae var. davisiae
1 Faces of leaf blades glabrous Aconogonon davisiae var. glabrum