BET HEDGING IN HETEROMORPHIC ACHENES OF HETERACIA SZOVITSII (ASTERACEAE), A DESERT EPHEMERAL
CHENG Xiao-Jun, TAN Dun-Yan
Chin J Plan Ecolo . 2009, (5): 901 -910 .  DOI: 10.3773/j.issn.1005-264x.2009.05.009