Family |
Asteraceae
Glebionis segetum
(L.) Fourr.
Glebionis segetum (L.) Fourr.
(First published in Ann. Soc. Linn. Lyon, sér. 2, 17: 90 (1869); basionym Chrysanthemum segetum L., first published in Sp. Pl.: 889 (1753); Nouvelle Flore du Liban et de la Syrie, vol. 3, Pl. CCXXXIV nº 1; 1983, as Chrysanthemum segetum L.) (Plants of the World Online)
• Life-form & habit : Annual herb, glaucous, glabrous, 30–60 cm tall; stems somewhat thick, simple or branched.
• Leaves : Leaves very irregularly toothed or lobed; lower leaves gradually attenuate at the base into a petiole, dilated toward the apex into 2–3 indistinct lobes, often deeply and irregularly toothed along the margin; cauline leaves semi-amplexicaul and less divided.
• Inflorescence & flowers : Capitula 2–3 cm wide, radiate and yellow; involucral bracts pale, unequal, ovate and obtuse, the inner bracts slightly scarious; ligules oblong.
• Fruit : Achenes without a pappus crown; radial achenes as broad as long, triangular, compressed, with broader marginal ribs; disk achenes turbinate, with 10 equal ribs.
• Phenology : Flowers from March to May.
• Habitat & elevation : Fields, mainly in coastal and lower mountain localities.
• Lebanese distribution : Recorded by Mouterde from Beyrouth, Nahr-el-Kelb, Tripoli, ‘Abey, Khan Jedid, ‘Antoura, Deir Tamiyé, Mkallès and Jisr-el-Khardali.
• Native range : Albania, Algeria, Cyprus, East Aegean Is., Greece, Italy, Kriti, Lebanon-Syria, Libya, Morocco, NW. Balkan Pen., Palestine, Tunisia, Türkiye, Türkiye-in-Europe.
• Introduced range : Alabama, Alaska, Angola, Austria, Azores, Baleares, Baltic States, Belarus, Belgium, California, Canary Is., Cape Provinces, Central European Russia, Chatham Is., Colombia, Connecticut, Corse, Czechia-Slovakia, Denmark, El Salvador, Eritrea, Ethiopia, France, Germany, Great Britain, Hungary, Ireland, Jawa, Louisiana, Madeira, Maine, Massachusetts, Mauritius, Netherlands, New South Wales, New York, New Zealand North, North Carolina, Northern Provinces, Northwest European Russia, Norway, Ohio, Oregon, Pennsylvania, Poland, Portugal, Sardegna, Saudi Arabia, Selvagens, Sicilia, South Carolina, South European Russia, Spain, Sri Lanka, Sweden, Switzerland, Tadzhikistan, Ukraine, Western Australia.
• Diagnostic remarks : Treated by Mouterde under Chrysanthemum segetum L.; POWO currently accepts Glebionis segetum (L.) Fourr. It is separated from Chrysanthemum coronarium sensu Mouterde, now Glebionis coronaria, by its leaves usually trilobed toward the apex, rather than bipinnatipartite, and by its achenes, with triangular compressed radial achenes and turbinate 10-ribbed disk achenes. It differs from Coleostephus myconis by its naked achenes and irregularly lobed leaves; C. myconis has achenes prolonged by a crown and leaves not divided, only serrate along the margin.