Dendrobium

Pignal, Marc & Munzinger, Jérôme, 2020, Morphological and anatomical investigation of New Caledonian graminoid Dendrobium (Orchidaceae) with the description of two new species, European Journal of Taxonomy 633, pp. 1-26 : 21-22

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

scientific name

Dendrobium
status

 

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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