For floral expression analysis, RNAs from sexual diploid dandelion (Taraxacum officinale) accession FCh72 buds and flower heads at different developmental stages, originating from plants of cuttings of FCh72, were isolated, including young stages (0, 1 and 2) in triplicate and older stages (3 and 7) and leaves as duplicates. The samples included young, whole buds (F0S0 organs initiating, stem ~0 cm) and buds and flower heads of older stages separated through the beaks in an upper (F) and lower (S) floral part: mature buds (F1, S1 organs determined and elongated, stem ~10 cm) open flowers (F2, S2), old flowers (F3, S3 3 days after pollination [DAP]) mature pappus (F7) and ripening seeds (S7 7 DAP), and leaves (LF). FCh72 is a vegetative clone of a plant grown from seeds collected in May 2005 from a meadow near Chatillon, Jura, France (Lat: 46.660 Lon: 5.723 Elev. 540m Population F3 from Verhoeven, K.J.F. and Biere, A., 2013, BMC Evol. Biol. 13: 1–8.