Family |
Thesiaceae
Thesium ramosum
Hayne
Thesium ramosum Hayne
First published in J. Bot. (Schrader) 1800(1): 30 (1801).
(Nouvelle Flore du Liban et de la Syrie, vol. 1, p. 379, Pl. CXXIV, 5; 1966)
Description
Life-form & habit: Perennial with a spindle-shaped, somewhat branched root and erect or ascending stems, 20–40 cm long.
Leaves: Linear.
Inflorescence & flowers: Inflorescence branchlets each bear one flower, subtended by a long bract and two smaller bracteoles.
Fruit: Very shortly stalked, with parallel longitudinal ribs rather than a network of veins. The bract usually extends far beyond the fruit; the bracteoles exceed it slightly.
Flowering and habitat
Phenology: Flowering April–June.
Habitat & elevation: Woodland and pastures.
Distribution
Lebanese distribution: Douma, Jabal Kneisse, Sannine, Nebaa Succar, Hadeth, Faraya, Ehden, Blaouze, Tannourine, Bcharre and Bekish.
Syrian distribution: Baghtche Caz–Kessab, Slenfe and Freiket pass.
Native range: Albania, Austria, Bulgaria, Central European Russia, Czechia-Slovakia, East European Russia, Greece, Hungary, Inner Mongolia, Iran, Iraq, Italy, Kazakhstan, Krym, Lebanon-Syria, North Caucasus, Northwest European Russia, NW. Balkan Pen., Romania, South European Russia, Transcaucasus, Turkmenistan, Türkiye, Türkiye-in-Europe, Ukraine, West Siberia, Xinjiang.
Introduced into: Alberta, Idaho, Montana, North Dakota.
⚠️ Taxonomic note:
Mouterde's account is headed Thesium arvense and explicitly includes T. ramosum Hayne. This reflects an older usage: Kew accepts T. ramosum, while the name T. arvense Horv. itself is placed under T. linophyllon. The morphology and localities here follow Mouterde's account of the plant he identified with T. ramosum.