Equisetum yongpingense A.T.Aung, T.Su & Z.K. Zhou, 2020
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publication ID |
https://dx.doi.org/10.3897/phytokeys.138.38674 |
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persistent identifier |
https://treatment.plazi.org/id/5610C311-C5DB-5068-AD03-CFF770BF5CA2 |
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treatment provided by |
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scientific name |
Equisetum yongpingense A.T.Aung, T.Su & Z.K. Zhou |
| status |
sp. nov. |
Equisetum yongpingense A.T.Aung, T.Su & Z.K. Zhou sp. nov.
Holotype.
XTBGYP0748 (Fig. 3A View Figure 3 ).
Paratypes.
XTBGYP0747 (Fig. 3B View Figure 3 ), XTBGYP1014 (Fig. 3C View Figure 3 ), XTBGYP1015 (Fig. 3D View Figure 3 ), XTBGYP0750 (Fig. 3E View Figure 3 ), XTBGYP0749 (Fig. 3F View Figure 3 ).
Locality.
Sanying Formation, Longmen Village, Yongping County, western Yunnan Province, south-western China (25.518N, 99.519E).
Age.
The late Pliocene.
Repository.
Paleoecology Collections, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences.
Etymology.
The species name ' yongpingense ' means that fossils are from Yongping County, south-western China.
Diagnosis.
Rhizomes with internodes and round nodes; fibrous roots on most nodes; two to four bunches of tubers arranged in a whorl on a node (Fig. 3A View Figure 3 ); tubers cylindrical in shape, one to two tubers on each bunch (Fig. 3A-B View Figure 3 ); longitudinal ridges not observed on the surface of tuber; the tip of tuber mucronate (Fig. 3A View Figure 3 ).
Description.
Rhizomes have both internodes and nodes (Fig. 3A View Figure 3 ). The internode is ~0.5 to 0.8 cm wide, the length is up to 5.1 cm (Fig. 3A View Figure 3 ). The node is round and ~0.7 to 1.0 cm in diameter (Fig. 3A-B View Figure 3 ). Most nodes have fibrous roots ~ 0.1 to 0.2 cm wide. Two to six bunches of tubers attach on one node and are arranged in a whorl (Fig. 3A-B View Figure 3 ). One to two tubers are preserved on each bunch (Fig. 3A-B View Figure 3 ). Tubers are cylindrical, ~ 1.5 to 3.4 cm long and 0.6 to 1.2 cm wide (Fig. 3A-F View Figure 3 ). Ridges were not observed on the surface of each tuber (Fig. 3A-B, E View Figure 3 ). The tip of tuber is mucronate (Fig. 3A View Figure 3 ).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.