New Taxa
The newest published taxa and newest record of Gesneriaceae from China before 31 December 2019 (17)



Petrocodon longitubus (Gesneriaceae), a new species from Guizhou, China


Phytotaxa 408 (4): 267–275




Petrocodon longitubus, a new species of Gesneriaceae from Guizhou province, China, is described and illustrated. It is similar to P. hunanensis in having four stamens, but readily differs in being rosulate and stemless and having a narrowly and very long infundibuliform floral tube with the adaxial lip bending upward. Molecular evidence indicates that it is sister to P. hunanensis, but the two species differ markedly in morphology.

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图 1. 系统发育树.

FIGURE 1. Majority rule consensus tree based on Bayesian inference analysis of Petrocodon based on ITS and trnL-F region. MPBS/BI-PP values (> 50%) are shown above branches. Asterisk represents MP-BS support values below 50%. Petrocodon longitubus is highlighted in bold font.


FIGURE 2. Petrocodon longitubus Cong R.Li & Yang Luo (Drawn by Hua Xie). (A) mature plant, (B) opened corolla showing stamens, (C) pistil, (D) fruit, (E) abaxial leaf blade, (F) calyx and disc, (G) anther, (H) mature stigma.





FIGURE 3. Petrocodon longitubus Cong R.Li & Yang Luo (Photo by Hua Xie). (A) habitat, (B) mature plant, (C) adaxial surface of leaf blade, (D) abaxial surface of leaf blade, (E) calyx and disc, (F) front view of flower, (G) lateral view of flower, (H) young fruit, (I) pistil with calyx and disc, (J) opened corolla showing stamens and staminodes.