supported by the Chinese National Key Project for Basic Research(“973"”)(2003CB715904);the National Natural Science Foundation of China(Grant Nos.30230030&30370105).
The chloroplast genes matK and rbcL, ribo- somal gene 18S and ITS regions of nuclear ribosomal DNA from Ephedra rhytidosperma, a species endemic to China, were sequenced and its phylogenetic position was investi- gate...