Dendrobium
publication ID |
https://doi.org/ 10.5852/ejt.2020.633 |
DOI |
https://doi.org/10.5281/zenodo.3803520 |
persistent identifier |
https://treatment.plazi.org/id/03A887CA-FF9B-FFBB-FF37-56F3646BFD7B |
treatment provided by |
Valdenar |
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Dendrobium |
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Key based on leaf anatomy (transverse section) to the graminoid species of Dendrobium View in CoL in New Caledonia
1. Leaves thick, vascular bundles in two parallel lines, very numerous (> 32), largest with diameter <½ the thickness of the leaf blade ......................................................................... D. crassifolium Schltr. View in CoL
– Leaves thin, vascular bundles in one line, less numerous (<30), largest with diameter> ¾ the thickness of the leaf blade ................................................................................................................. 2
2. Vascular bundles <15, midrib prominent or not, largest bundles in position 2 or 3(–4–5) .............. 3 – Vascular bundles> 22, midrib prominent, largest bundle in position 5(–6) ..................................... 4
3. Supernumerary fibre bundles numerous on both sides (> 35), large ( Fig. 4A View Fig ), largest vascular bundle in position 2, midrib prominent in leaf section ............................................. D. unicarinatum Kores View in CoL
– Supernumerary fibre bundles only on abaxial side, few (<15), small, largest vascular bundle in position 3(–4–5), midrib not prominent in leaf section ....................................................................... ......................................................................................... D. butinii M.Pignal & Munzinger View in CoL sp. nov.
4. Margins obtuse in transverse section ( Fig. 4 View Fig Ba) ................................................................................. .............................................................................. D. letocartiorum Munzinger & M.Pignal View in CoL sp. nov. – Margins truncate in transverse section ( Fig. 4 View Fig Bb) .................................... D. camaridiorum Rchb. View in CoL f.
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