Cladopus fallax, C. Cusset

Kato, Masahiro, Werukamkul, Petcharat, Won, Hyosig & Koi, Satoshi, 2019, Paraphyletic Species of Podostemaceae: Cladopus fallax and Polypleurum wallichii, Phytotaxa 401 (1), pp. 33-48 : 38

publication ID

https://doi.org/ 10.11646/phytotaxa.401.1.3

DOI

https://doi.org/10.5281/zenodo.5752603

persistent identifier

https://treatment.plazi.org/id/03AA87C3-FFA5-1016-FF4E-D9F9FADEF9A9

treatment provided by

Felipe

scientific name

Cladopus fallax
status

 

Cladopus fallax View in CoL

Cladopus fallax was distinguished from other congeners by combined characters. It differs from C. taiensis in the form (surface-viewed and in cross section), surface and number of the bract-segments, from C. nymanii H.Möller in the length of the stamens and the number of ovules, from C. queenslandicus (Domin) C.D.K.Cook & Rutish. in the length of the flowering shoots and the number and form of the bracts, and from C. javanicus M.Kato & Hambali in the length of the flowering shoots, the number of the bracts, and the length of the capsules and capsule stalks ( Table 2 View TABLE 2 ).

In the chloroplast matK tree ( Fig. 1 View FIGURE 1 ), Cladopus was divided into two clades with robust support. One clade (upper in Fig. 1 View FIGURE 1 ) was subdivided into three subclades, i.e. a subclade consisting of C. fallax -1 from Cambodia, C. fallax -2 from Thailand and C. taiensis ; a subclade of C. javanicus , C. nymanii and C. queenslandicus ; and C. fallax - 3 from Cambodia. Cladopus fallax -1 had the same sequence as the Thai specimens of C. taiensis (TL-101, TL-102, TL-604), the two were sister to the other C. taiensis from Cambodia and Thailand, and all were sister to C. fallax -2. Geographically, C. fallax -1 is adjacent to C. taiensis (CAM-07, CAM-14) of Cambodia (4.2 or 12.2 km apart) and far from the Thai populations.

The nuclear ITS tree ( Fig. 2 View FIGURE 2 ) showed that there are variations in the ITS regions of C. fallax CAM-13, C. fallax CAM-19 and C. taiensis CAM-14, while uniform in others (e.g. C. fallax CAM-26, C. fallax CAM-41, C. fallax TKF-109, C. taiensis TL-604). The variants of CAM-13 and CAM-19 of C. fallax -1, and CAM-14 of C. taiensis were grouped in each clade, although one C. fallax CAM-13 was isolated. These samples of C. fallax -1 and C. taiensis formed a monophyletic clade, with low support, which was sister to C. fallax -2 and together sister to C. fallax -3.

In the combined matK and ITS tree, C. fallax -1 and C. taiensis were monophyletic and sister to C. fallax -2 ( Fig. 3 View FIGURE 3 ). Then, C. fallax -1, C. fallax -2, C. fallax -3 and C. taiensis , together with C. javanicus , were monophyletic.

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