Xanthium

R. D. Meikle, Flora of Cyprus 2. 1985
but modified
1Stems armed with branched, yellow spines; leaves lanceolate in outline, about 3 times as long as broad; grey-white canescent beneath, green above; capitula generally solitary; achene 6-7 x 1 mm
1'Stems unarmed; leaves ovate in outline, about 1.5 times as long as broad, green on both surfaces; capitula generally in clusters; achene 9-15 x 4-5 mm