Difference between revisions of "Dittrichia"
Exsicc. Genav. Conserv. Bot. Distrib. Fasc. 4: 71. 1973.
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|distribution=Mediterranean;introduced also in Asia;Africa;Australia. | |distribution=Mediterranean;introduced also in Asia;Africa;Australia. | ||
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|discussion=<p>Species 2 (1 in the flora).</p><!-- | |discussion=<p>Species 2 (1 in the flora).</p><!-- | ||
| − | --><p>Dittrichia viscosa (Linnaeus) Greuter [Inula viscosa Linnaeus, Cupularia viscosa (Linnaeus) Godron & Grenier] was collected in the late 1800s as a ballast weed in Florida, New Jersey, and Pennsylvania. It does not appear to have become naturalized at any of those sites (A. Cronquist 1980; J. E. Arriagada 1998).</p> | + | --><p><i>Dittrichia</i> viscosa (Linnaeus) Greuter [<i>Inula</i> viscosa Linnaeus, Cupularia viscosa (Linnaeus) Godron & Grenier] was collected in the late 1800s as a ballast weed in Florida, New Jersey, and Pennsylvania. It does not appear to have become naturalized at any of those sites (A. Cronquist 1980; J. E. Arriagada 1998).</p> |
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|publication year=1973 | |publication year=1973 | ||
|special status= | |special status= | ||
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|tribe=Asteraceae tribe Inuleae | |tribe=Asteraceae tribe Inuleae | ||
|genus=Dittrichia | |genus=Dittrichia | ||
Latest revision as of 20:56, 5 November 2020
Annuals [perennials], mostly 20–130 cm (glandular, viscid). Leaves mostly cauline (at flowering), alternate; sessile; blade margins entire or dentate [serrate]. Heads radiate, in racemiform or paniculiform arrays. Involucres ± campanulate, 3–8[–10+] mm diam. Phyllaries persistent (spreading to reflexed in fruit), in 3–4 series, unequal. Receptacles flat, smooth or alveolate, epaleate. Ray florets (6–)10–12(–16), pistillate, fertile; corollas yellow, aging reddish, laminae 2–7 mm. Disc florets 8–20+; corollas yellow, aging reddish, lobes 4–5. Cypselae ellipsoid to terete (abruptly constricted distally; usually glandular distally); pappi persistent (fragile), of basally connate, barbellate bristles in 1 series. x = 9, 10.
Distribution
Introduced; Mediterranean, introduced also in Asia, Africa, Australia.
Discussion
Species 2 (1 in the flora).
Dittrichia viscosa (Linnaeus) Greuter [Inula viscosa Linnaeus, Cupularia viscosa (Linnaeus) Godron & Grenier] was collected in the late 1800s as a ballast weed in Florida, New Jersey, and Pennsylvania. It does not appear to have become naturalized at any of those sites (A. Cronquist 1980; J. E. Arriagada 1998).
Selected References
None.