Abstract
Saxifraga cataphracta, a new species of Saxifragaceae from Southwest China, is described and illustrated. Morphological and molecular evidence (matK ,psbA-trnH , psaJ-rpl33 ) indicate that S. cataphractabelongs to S. sect. Irregulares , and closely related to S. geifolia and S. mengtzeana . The new species can be diagnosed by its leaf blade abaxially with white or virescent interveinal streaks, involucre and bracts conspicuous, capsule beaks winged when mature.