Evolutionary history of plants seed model is shared by basically all gymnosperms (literally: "naked seeds"), most of which encase their seeds in a woody cone or fleshy aril (the yew, for example), but none of which fully enclose their seeds. The angiosperms ("vessel seeds") are the only group to fully enclose the seed, in a carpel. Fully enclosed seeds opened up a new pathway for plants to follow: that of seed dormancy. The embryo, completely isolated from the external atmosphere and hence protected from desiccation, could survive some years of drought before germinating. Gymnosperm seeds from the Late Carboniferous have been found to contain
Unwins Seeds A1(M) just north of the A14 Alconbury junction. It has garden seeds for flowers and plants. It has the largest share of the UK amateur seed market. Unwins Seeds Unwins Seeds is a British seed company based in Alconbury Weston, Huntingdon in Cambridgeshire. "The Times" describes Unwins as "a firm that has grown ... to become one of the most familiar features of Britain’s horticultural landscape", and the BBC calls the company "world-famous". Unwins Seeds was formed in 1903 by William Unwin by selling sweet pea seeds. His son Charles, who had an interest in sweet peas, joined the business