Difference between revisions of "Helminthotheca"
Cat. Pl. Hort. Gott., 430. 1757.
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|discussion=<p>Species 4 (1 in the flora).</p> | |discussion=<p>Species 4 (1 in the flora).</p> | ||
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|family=Asteraceae | |family=Asteraceae | ||
|illustrator=Barbara Alongi | |illustrator=Barbara Alongi | ||
| + | |illustration copyright=Flora of North America Association | ||
|distribution=Europe;widely introduced. | |distribution=Europe;widely introduced. | ||
|introduced=true | |introduced=true | ||
| − | |reference= | + | |reference=None |
|publication title=Cat. Pl. Hort. Gott., | |publication title=Cat. Pl. Hort. Gott., | ||
|publication year=1757 | |publication year=1757 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V19_438.xml |
|tribe=Asteraceae tribe Cichorieae | |tribe=Asteraceae tribe Cichorieae | ||
|genus=Helminthotheca | |genus=Helminthotheca | ||
Revision as of 19:19, 16 December 2019
Annuals or biennials, 10–100+ cm; taprooted. Stems usually 1, erect, branched distally or throughout, hirsute to hispid or setose (hair tips 2–4-hooked). Leaves basal and cauline; basal ± petiolate, distal sessile; blades elliptic, lanceolate, oblanceolate, oblong, or ovate, margins usually dentate to pinnately lobed (faces hirsute to hispid, hair tips 2–4-hooked). Heads borne singly or in loose, corymbiform arrays. Peduncles (terminal and axillary) not inflated distally, seldom bracteate. Calyculi of (3–)5, cordate or ovate to lance-ovate, foliaceous bracts. Involucres ovoid to urceolate, 9–12+ mm diam. (larger in fruit). Phyllaries (5–)8–13+ in 1 series, lance-linear to linear, subequal, margins little, if at all, scarious, apices acuminate. Receptacles flat, pitted, glabrous, epaleate. Florets 30–60+; corollas yellow (often reddish abaxially). Cypselae (dimorphic): outer whitish, bodies gibbous, ribs 5–10, beaks about equaling bodies, fragile, faces hirtellous to pilosulous adaxially; inner reddish brown, bodies ± compressed-ellipsoid to fusiform, beaks about equaling or longer than bodies, fragile, faces transversely rugulose to muricate, otherwise glabrous; pappi persistent, of 10–15+, whitish, subequal, barbellate or plumose, subulate to setiform (basally connate) scales in 1–2 series. x = 5.
Distribution
Europe, widely introduced.
Discussion
Species 4 (1 in the flora).
Selected References
None.