Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 101. (Budapest 2009)

Somlyay, L.: Occurrence of Chamaesyce glyptosperma, and a survey of the genus Chamaesyce (Euphorbiaceae) in Hungary

ANNALES HISTORICO-NATURALES MUSEI NATIONALIS HUNGARICI Volume 10

1 Budapest, 200

9 pp. 23-32 Occurrence of Chamaesyce glyptosperma, and a survey of the genus Chamaesyce (Euphorbiaceae) in Hungary L. SOMLYAY Department of Botany, Hungarian Natural History Museum, H-1476 Budapest, Pf 222, Hungary. E-mail: somlyay@bot.nbmus.hu Abstract - Chamaesyce glyptosperma (ENGELMANN) SMALL, 1903 new to the flora of Hungary was collected on the outskirts of Budapest in 2008. Checking Hungarian herbaria a further specimen of C. glyptosperma collected near Agárd (central Hungary) in 1957 erroneously identified as "Euphorbia humifusa WILLD." was found. With the exception of C. maculata (LINNAEUS) SMALL, 1903 all revised herbarium specimens of Chamaesyce GRAY, 1821 species recorded in Hungary are enumerated. Relevant literature records are evaluated based on voucher specimens. The single Hungarian record of C. canescens (LINNAEUS) PROKHANOV, 1933 (Vácrátót, north Hungary) is considered doubtful. Former Hungarian occurrences of C. humifusa (WILLDENOW) PROKHANOV, 1927 are documented from only two botanical gardens in Budapest. Though no authentic new record was published in the last 50 years, vouchers of C. nutans (LAGASCA) SMALL, 1903 refer to former naturalisation of this species in the southern regions of Hungary. With one figure. Key words - Chamaesyce glyptosperma, Euphorbia, flora, Hungary, neophyte. INTRODUCTION Chamaesyce GRAY, 1821, often considered as a section or subgenus of genus Euphorbia LINNAEUS, 1753 (THELLUNG 1917, SMITH & TUTIN 1968, see BEN EDI & QUELL 1992), is a cosmopolitan genus with main distribution centres in the tropical America and Africa (WEBSTER 1994). While only a few Chamaesyce taxa can be considered as native in some regions of Europe, several species of the genus mainly of American origin were introduced to Europe during the last 200-300 years (THELLUNG 1917, SMITH & TUTIN 1968, BENEDÍ & ORELL 1992, HÜGIN & HÜGIN 1997, HÜGIN 1998,1999). Annls hist.-nat. Mus. natn. hung. 101, 2009