Valsorda, Gualdo Tadino - Viola eugeniae Parl.
L. Gratani, G. Fabrini, M.F. Crescente, L. Varone, A. Bonito & M. Marcoccia
Dipartimento di Biologia Vegetale, “Sapienza” Università di Roma, P.le Aldo Moro 5, 00185 Roma; e-mail email@example.com
Growth efficiency of Bidens cernua L. Italian flora rare species.The growth efficiency of Bidens cernua L., included in the Red List of Italian Flora (status CR), was analysed. Experiments were carried out in situ (Posta Fibreno lake, Latium) and ex situ (Botanical Garden of Rome) during the year 2006. The time span from seedlings emergence to seed dispersion was 7 months. Air temperature changing influenced the length of the vegetative activity period and the maximum plant height. Maximum plant height was reached 131 and 96 days after seedlings emergence in situ and ex situ, respectively.
Bidens cernua L., growth efficiency, phenology, RGR, vegetative activity.