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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. cataphracta belongs in S. sect. Irregulares, and is 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...
The effects of Y on the precipitation evolution and recrystallization of Al–Zr alloys were investigated. The results show that the addition of Y obviously accelerates the precipitation kinetics of Al 3 Zr with L1 2 structure in Al–Zr–Y alloys. The number density of Al 3 (Zr,Y) precipitates is nearly one order of magnitude larger than that of Al 3 Zr. Smaller Al ...
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