Equisetum yenbaiense A.T.Aung, T.Su, T.V.Do & Z.K.Zhou, 2020
|
publication ID |
https://dx.doi.org/10.3897/phytokeys.138.38674 |
|
persistent identifier |
https://treatment.plazi.org/id/8AF9194F-9E0C-55B4-A5EA-87D79B3ACA15 |
|
treatment provided by |
|
|
scientific name |
Equisetum yenbaiense A.T.Aung, T.Su, T.V.Do & Z.K.Zhou |
| status |
sp. nov. |
Equisetum yenbaiense A.T.Aung, T.Su, T.V.Do & Z.K.Zhou sp. nov.
Holotype.
XTBGVNMN4001 (Fig. 2D View Figure 2 ).
Paratypes.
XTBGVNMN4002-4004 (Fig. 2C, E-F View Figure 2 ).
Locality.
Hop Thanh Village, Tuy Loc Commune, Yen Bai Province, northern Vietnam (21.725N, 104.849E).
Age.
The late Miocene.
Repository.
Paleoecology Collections, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences and Vietnam National Museum of Nature, Vietnam Academy of Science and Technology.
Etymology.
The species name ' yenbaiense ' means that fossils are from Yen Bai Province, northern Vietnam.
Diagnosis.
Rhizomes with internodes and nodes, node round; Four bunches of tubers arranged in a whorl on a node (Fig. 2D View Figure 2 ); most tubers elongate in shape, with one to two tubers in each bunch (Fig. 2C-D View Figure 2 ); longitudinal ridges on the surface of tuber; the tip of tuber mucronate (Fig. 2F View Figure 2 ).
Description.
Rhizomes have both internodes and nodes (Fig. 2D View Figure 2 ). The internode is ~0.2-0.3 cm in width, the length could not be observed, three longitudinal ridges are on the surface of the internode (Fig. 2D View Figure 2 ). The node is round and ~0.2 cm in diameter (Fig. 2D View Figure 2 ). Four bunches of tubers attach to one node and arrange in a whorl (Fig. 2D View Figure 2 ). Only one tuber is preserved on each bunch, but it is likely that there are more than one tuber on each bunch (Fig. 2E-F View Figure 2 ). Most tubers are elongate (Fig. 2D View Figure 2 ); few are elliptical (Fig. 2F View Figure 2 ), being~ 0.8 to 3.0 cm long and 0.4 to 1.0 cm wide. Two to four ridges are on the surface of each tuber (Fig. 2D View Figure 2 ). The tip of tuber is mucronate (Fig. 2F View Figure 2 ).
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.