Difference between revisions of "Rigiopappus"

A. Gray

Proc. Amer. Acad. Arts 6: 548. 1865.

Etymology: Latin rigeo, rigid, and pappus alluding to stiff pappus scales
Treatment appears in FNA Volume 20. Treatment on page 48. Mentioned on page 3, 9, 46.
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|discussion=<p>Species 1.</p>
 
|discussion=<p>Species 1.</p>
 
|tables=
 
|tables=
|references=
+
|references={{Treatment/Reference
 +
|id=ornduff1975b
 +
|text=Ornduff, R. and B. A. Bohm. 1975. Relationships of Tracyina and Rigiopappus (Compositae). Madroño 23: 53–55.
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}}
 
}}<!--
 
}}<!--
  
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|illustration copyright=Flora of North America Association
 
|illustration copyright=Flora of North America Association
 
|distribution=w North America.
 
|distribution=w North America.
|reference=None
+
|reference=ornduff1975b
 
|publication title=Proc. Amer. Acad. Arts
 
|publication title=Proc. Amer. Acad. Arts
 
|publication year=1865
 
|publication year=1865
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V20_71.xml
+
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V20_71.xml
 
|tribe=Asteraceae tribe Astereae
 
|tribe=Asteraceae tribe Astereae
 
|genus=Rigiopappus
 
|genus=Rigiopappus

Revision as of 20:51, 27 May 2020

Annuals, 5–30+ cm (taprooted). Stems usually erect, simple or branched (laterals often overtopping main stems), pilosulous to hirtellous, glabrate. Leaves mostly cauline (at flowering); alternate; ± sessile; blades (1- or 3-nerved) narrowly oblanceolate to lance-linear or linear, margins entire, faces glabrous or sparsely hirsutulous. Heads radiate, borne singly. Involucres ± cylindric to turbinate, 1–3(–5+) mm diam. Phyllaries 11–20+ in 2+ series, 1-nerved (flat) linear to lanceolate or subulate, subequal (distinct), herbaceous, margins scarious, faces hirsutulous (± navicular, each of the inner usually ± enfolding a floret). Receptacles ± flat, obscurely pitted, sparsely paleate (between ray and disc florets, paleae resembling inner phyllaries). Ray florets 3–13+ (usually 3, 5, or 8), pistillate, fertile; corollas yellowish, often tinged with red or purple (laminae inconspicuous). Disc florets 5–70+, bisexual, fertile; corollas pale yellow, sometimes tipped with purple, tubes shorter than narrowly funnelform throats, lobes 2–4, erect, ± deltate; style-branch appendages subulate to filiform. Cypselae ± cylindric to fusiform, little, if at all, compressed, transversely rugulose, all minutely hirsutulous or ray cypselae glabrous or nearly so; pappi persistent, usually of 3–5 subulate scales (sometimes much reduced or 0 on ray cypselae). x = 9.

Distribution

w North America.

Discussion

Species 1.