The germinative behavior of nine plant species of the Iberian Peninsula, four of them catalogued as vulnerable or endangered by the International Union for the Conservation of Nature, was studied under controlled laboratory conditions. Most of the species studied germinated better at relatively low temperatures (15 #xB0;C and 20 #xB0;C) and, in general, high germination rates were also obtained at alternating temperatures (25/15 #xB0;C).Coronopus navasiigerminated over 60 at 25 #xB0;C, the highest temperature used in this study.Lavatera oblongifoliadid not surpass 20 germination under any of the conditions assayed. Seed coat scarification increased germination inHelianthemum squamatum, while seed pretreatments with hot water or sulfuric acid were effective inH. polygonoides.Less favorable results were obtained inLavatera oblongifolia, whereas scarification was completely ineffective inOnobrychis peduncularisssp.matritensis.
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