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Differentiation patterns in the Scutellaria albida group (Lamiaceae) in the Aegean area
Author(s) -
Bothmer Roland
Publication year - 1985
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.1985.tb01672.x
Subject(s) - biology , subspecies , scutellaria , lamiaceae , taxon , botany , inbreeding , endemism , ecotype , taxonomy (biology) , balkan peninsula , brassicaceae , zoology , ecology , population , medicine , alternative medicine , demography , pathology , traditional chinese medicine , sociology
An experimental investigation of the mainly white‐flowered Scutellaria albida group in the Aegean area was carried out. Eight populations representing maximum morphological variation as well as geographic separation were chosen for crosses between populations. Strong sterility barriers were observed in the Cretean endemic species, S. sieberi Benth., which also deviated morphologically and is probably an ancient relic. Strong crossing barriers were also found in plants from Euboea, and, in spite of little morphological differentiation from S. albida L. s. str., they are treated as a separate species, S. goulimyi Rech. fil. Crossing barriers of intermediate strength were present in morphologically distinct material from N Sporades, which is also treated as a separate species, S. sporadum Bothmer sp. nov. All other populations showed high compatibility in crosses among themselves, viz. populations from Bulgaria, Thrace, Andros, Naxos, and Rodhos. These were treated as the same species, S. albida , having large local as well as clinal variation. Three subspecies are retained: ssp. albida in the north; ssp. perhispida (Bornm.) Bothmer in E Macedonia, Thrace and on the islands; and the mainly purple‐flowered, ssp. vacillans (Rech. fil.) Bothmer, endemic to the peninsula of Athos. Evolutionary pathways and phytogeographical patterns are discussed. S. sporadum is mainly inbreeding and, in S. sieberi , indications of a self‐incompatibility system were found. The other taxa have a more versatile system.