Dendrobium camaridiorum Rchb.f.

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: 7-11

publication ID

https://doi.org/10.5852/ejt.2020.633

DOI

http://doi.org/10.5281/zenodo.3803514

persistent identifier

http://treatment.plazi.org/id/03A887CA-FF89-FFA4-FDCE-540A6332F99B

treatment provided by

Valdenar

scientific name

Dendrobium camaridiorum Rchb.f.
status

 

Dendrobium camaridiorum Rchb.f.  

Figs 1E View Fig , M–N, Q–R, 3 View Fig A–B, 4 View Fig Bb, 5 View Fig A–B, 6 View Fig

Linnaea   41: 89 (Reichenbach 1877). – Type: NEW CALEDONIA • Balade; Vieillard 1332 (nec 1192); lectotype: W, here designated; isolectotype: P[ P00124865]!.  

Material examined

NEW CALEDONIA – Deplanche 528bis; P[ P00124867, P00124868]   Legand 4888; P[ P00124869]   s. loc., cultivated in Parc E. Liais, Cherbourg-en-Cotentin ; 5 Apr. 2003; M. Pignal 2046; (original data: collected alive in 1985 in New Caledonia); P[ P00777178]. – Province Nord •   Haute vallée de la Tchamba ; [21°1′55″ S, 165°13′36″ E]; alt. 100–200 m; gallery forest, near the river; 28 Dec. 1965; H.S. MacKee 13753; P[ P00124850] GoogleMaps   Haute vallée de l’Amoa (exploitation forestière Létocart ); [21°0′2″ S, 165°14′31″ E]; alt. 300–500 m; humid forest; 13 Jan.1966; H.S.MacKee 14228; P[ P00124838, P00124849] GoogleMaps   Haute Amoa ; [20°58′24″ S, 165°10′21″ E]; alt. 50–100 m; humid forest; 20 Nov. 1967; H.S. MacKee 17984; P[ P00124846, P00124874] GoogleMaps   Haute Tchamba (exploitation forestière Letocart ); [21°1′11″ S, 165°13′46″ E]; alt. 500 m; humid forest; 21 Nov. 1967; H.S. MacKee 17991; P[ P00124872] GoogleMaps   Mont Ignambi (north-east slope); [20°27′11″ S, 164°35′50″ E]; alt. 900 m; humid forest on schists; 8 Nov. 1971; H.S. MacKee 24639; P[ P00124845] GoogleMaps   Ponérihouen: east buttress of Mont Aoupinié ; [21°11′0″ S, 165°17′48″ E]; alt. 700–850 m; humid forest on grauwackes; 28 Jun. 1972; H.S. MacKee 25626; P[ P00124844] GoogleMaps   Farino, Pic Vincent ; [21°2′48″ S, 165°10′8″ E]; alt. 700 m; humid forest; 3 Mar. 1973; H.S. MacKee 26374; P[ P00124843] GoogleMaps   Haute Diahot , Tendé, exploitation forestière Frouin ; [20°24′37″ S, 164°31′19″ E]; alt. 600 m; humid forest, micaschists; 26 Apr. 1976; H.S. MacKee 31162; P[ P00124839] GoogleMaps   Roche Ouaième ; [20°38′35″ S, 164°51′36″ E]; alt. 850 m; maquis, schists; 22 Dec. 1977; H.S. MacKee 34465 (leg. Cherrier); P[ P00121154] GoogleMaps   Monéo ; [21°8′21″ S, 165°27′51″ E]; alt. 250 m; altered serpentine plateau, maquis; 25 Apr. 1979; H.S. MacKee 36818; P[ P00124877] GoogleMaps   Pouébo: Mont Mandjélia ; [20°24′9″ S, 164°31′28″ E]; alt. 700 m; humid forest, micaschists; 8 Feb. 1981; H.S. MacKee 38729 (leg. Bégaud); P[ P00124870] GoogleMaps   Mandjélia , forested slopes; [20°24′ S, 164°32′ E]; alt. 500 m; 20 Dec. 1981; G. McPherson 4531; MO GoogleMaps   Ponandou River Valley, forested slopes below Mont Inédète ; 20°49′10″ S, 165°11′18″ E; alt. 550 m; 10 May 2002; G. McPherson 18723; MO GoogleMaps   Cascade la Guen ; 19 Nov. 2010; J. Munzinger 6358, P. Lowry, M. Callmander, H. Vandrot, T. & M. Teimpouene; MO   Bopope, base of the Kantalupaik (south buttress), summit of the Inédète range; 20°51′7″ S, 165°0′28″ E; alt. 320 m; 28 Dec. 2017; fl.; M. Pignal 516 5, J. Munzinger & D. Bruy; P[ P01073021] GoogleMaps   Balade ; [20°18′56″ S, 164°29′52″ E]; s.d.; E. Vieillard 1332; P[ P00124865] GoogleMaps   Mont Görö Até ; 21°1′42″ S, 165°10′12″ E; 19 Nov. 2002; F. Tronchet 484, J. Munzinger, D. Létocart, I. Létocart, J.-P. Butin, A. Oddi & A. Obry; P[ P00354837, P00354120]. – Province Sud • GoogleMaps   Forest of ‘Mois de Mai’ ; [22°7′6″ S, 166°38′48″ E]; 13 Jun. 1951; M.G. Baumann-Bodenheim 14050; P[ P00124861] GoogleMaps   ibid.; 24 Jun. 1951; M.G. Baumann-Bodenheim 14179; P[ P00124860] GoogleMaps   Mont “Algaoné” [Algaoué], serpentine; [22°12′10″ S, 166°31′40″ E]; alt. 500 m; 19 Dec. 1950; A. Guillaumin 7031 & M.G. Baumann-Bodenheim; P[ P00124859] GoogleMaps   Mé Amméri ; [21°39′34″ S, 165°50′36″ E]; alt., 700 m; 27 Nov. 1950; A. Guillaumin 8647 & M.G. Baumann-Bodenheim; P[ P00124852] GoogleMaps   ibid.; 27 Nov. 1950; A. Guillaumin 8700 & M.G. Baumann-Bodenheim; P[ P00124851] GoogleMaps   ibid.; 28 Nov. 1950; A. Guillaumin 8744 & M.G. Baumann-Bodenheim; P[ P00124854] GoogleMaps   ibid.; 28 Nov. 1950; A. Guillaumin 8721; P[ P00124748] GoogleMaps   ibid.; 28 Nov. 1950; A. Guillaumin 8780 & M.G. Baumann-Bodenheim; P[ P00124853] GoogleMaps   ibid.; 28 Nov. 1950; A. Guillaumin 8882 & M.G. Baumann-Bodenheim; P[ P00124855] GoogleMaps   ibid.; 29 Nov. 1950; A. Guillaumin 8938 & M.G. Baumann-Bodenheim; P[ P00124856] GoogleMaps   ibid.; 29 Nov. 1950; A. Guillaumin 8969 & M.G. Baumann-Bodenheim; P[ P00124858] GoogleMaps   ibid.; 30 Nov.1950; A. Guillaumin 9030 & M.G. Baumann-Bodenheim; P[ P00124864] GoogleMaps   Forest of Rivière Bleue ; [22°6′11″ S, 166°38′0″ E]; 22 Feb. 1951; A. Guillaumin 10965 & M.G. Baumann-Bodenheim; P[ P00124857] GoogleMaps   ibid.; A. Guillaumin 10966a & M.G. Baumann-Bodenheim; P[ P00124863] GoogleMaps   Mont Bario ; [22°10′54″ S, 166°30′18″ E]; alt. 500 m; 20 Apr. 1951; A. Guillaumin & M.G. Baumann-Bodenheim 12523a; P[ P00124862] GoogleMaps   Farino: forest of Mépéou (Exploitation forestière Germain); [21°37′5″ S, 165°46′35″ E]; alt. 500 m; humid forest; 11 Feb. 1966; H.S. MacKee 14412; P[ P00124848, P00124873] GoogleMaps   Col d’Amieu: Mont Pembai ; [21°34′36″ S, 165°49′38″ E]; alt. 500–600 m; humid forest; 10 Jun. 1973; H.S. MacKee 26765; P[ P00124842] GoogleMaps   ibid.; H.S. MacKee 26766; P[ P00124841] GoogleMaps   Port Boisé , associated to 30278; [22°20′58″ S, 166°56′18″ E]; 24 Jan. 1976; H.S. MacKee 30672 (leg. Aymard); P[ P00124840] GoogleMaps   4 km west of Mé Aoui; [21°25′27″ S, 165°32′6″ E]; alt. 600 m; humid forest, schists; 31 Oct. 1976; H.S. MacKee 32173 (leg. Bégaud); P[ P00124847] GoogleMaps   Port Boisé ; [22°20′59″ S, 166°56′19″ E]; 9 May 1978; H.S. MacKee 35091 (leg. Bégaud); P[ P00124878] GoogleMaps   Paita: Tao ; [20°34′24″ S, 164°47′57″ E]; 8 Apr. 1982; H.S. MacKee 40310 (leg. Bégaud); P[ P00121153] GoogleMaps   Piste du Dzumac ; [22°4′46″ S, 166°26′34″ E]; alt. 800 m; 16 Mar. 1985; H.S. MacKee 42497 (leg. Aymard); P [ P00124875] GoogleMaps   Dzumac track ; [22°4′2″ S, 166°26′39″ E]; alt. 900 m; humid forest, serpentine terrain; 20 Dec. 1985; H.S. MacKee 42955 (leg. Aymard); P[ P00124871] GoogleMaps   Thy River valley , ca 12 air-km NE of Nouméa, rainforest near 400 m; [20°10′55″ S, 166°31′19″ E]; 8 Apr. 1979; G. McPherson 1530; P[ P00124876]; MO GoogleMaps   Mt. Rembai: above Col d’Amieu, forested slopes ; [21°36′ S, 165°51′ E]; alt. 650–850 m; 9 May 1984; G. McPherson 6542; P[ P00124876]; MO GoogleMaps   Flanc du Mont Dore ; [22°17′36″ S, 166°35′17″ E]; s.d.; Musée Néocalédonien 394; P [ P00124866] GoogleMaps   .

Description

Epiphyte (also lithophytic), erect with graminoid habit. Roots whitish, ca 1–2 mm wide, at the base of the plant (axillary roots lacking, but sometimes with adventive rooted plantlets, ‘keikis’). Stems spindly, 20–70 cm long, cylindrical, covered by the sheaths of the oldest leaves, lamina remaining only from the upper middle to the upper third of the adult stem. Lamina narrow and long, 45–100 × 4–5 mm, apex attenuated, carrying a V-shaped depression under half of its length ( Fig. 1R View Fig ). Internodes 25–30 mm long at the base of the stem. Sheaths deeply furrowed, beak opposite to the lamina, flute-shaped. Inflorescences always 2-flowered. Ovary resupinate. Flower white, fragrant. Sepals long, narrow, attenuated, ca 35 × 2 mm. Petals long and narrow, equaling the sepals, 30 × 2 mm. Lip trilobate, lateral lobes rounded, median lobe ending as a point, the lip with orange deep within. Central carina proximal, without papillose hairs, edge slightly toothed. Dots yellow-orange on the mentum and the carina. Mentum 4 mm long. Column 3 mm long. Fruit fusiform, greenish yellow, ca 15 mm long and 8 mm in diameter. Dried seed with transparent testa about 191 × 54 μm, fusiform, with extremity and base truncate. Extremity strongly spiral. Hydrated seed ovate sacciform. Cells cubic or with extremities rounded, elongate, ca 57–100 × 7.3–8.5 μm, edges thick with spiral orientation, cellular walls smooth. Embryo spherical ca 10–11 μm in diameter ( Fig. 3 View Fig A–B).

Distribution and ecology

The endemic plant is widespread in humid or gallery forests all over the main island ‘Grande-Terre’, from 50 to 900 m, but has not been observed in sclerophyll forest (west coast), or in the extreme northwest ( Fig. 6 View Fig ).

Taxonomic notes

Dendrobium camaridiorum   produces numerous adventive plantlets (‘keikis’), which is not the case of D. butinii   sp. nov. The long, attenuated leaves with a V-shaped depression on the blade surface are the easiest characters to observe in D. camaridiorum   . It is distinguished from D. butinii   sp. nov. by the white, very elongated sepals (shorter and green in D. butinii   sp. nov.). Leaf anatomy shows D. camaridiorum   very similar to D. letocartiorum   sp. nov. (see details under D. letocartiorum   sp. nov. below).

Phenology

Flowers are observed throughout the year. It seems that the hours of opening (in the morning) and closing of the flowers (in the afternoon) are synchronous throughout the territory.

IUCN status

Dendrobium camaridiorum   is the most abundant species of the graminoid group in New Caledonia, and was evaluated as Least Concern (LC) by the New Caledonian Red List Authority.

Typification

Vieillard’s numeration cannot be understood as true collection numbers ( Morat 2010). Indeed, he often attributed the same number to different gatherings that he regarded as comprising a single species, however he confused many taxa, thereby generating some nomenclatural problems as many of his collections were chosen as types (see for example Pierre et al. 2014). Comparison of the material deposited at W with a specimen at P that clearly represents the same collection indicates that an error occurred in transcribing the number on the former, which is probably a fragment removed from the original specimen. Labels on the Paris   specimen bear the number Vieillard 1332, whereas the sheet at W is numbered 1192, which in fact corresponds to material of Phyllanthus cornutus Baill.   ( Euphorbiaceae Juss.   ). The material in Vienna consists of a stem fragment, several leaves, a single, dissected, immature flower, and a drawing of the Paris   material. The latter is a tracing of the Paris   plant (Hallé, pers. comm.). This interpretation is consistent with Reichenbach’s visit to P in April 1864 ( Paris Herbarium Visit Catalogue   ). Paris’s material comprises a bud and a tuft of 3 stems, and is clearly conspecific with the fragmentary collection at W. We can reasonably assume that Reichenbach studied both P and W material, which would thus represent syntypes. We have selected the material at W as the lectotype as it clearly served as the basis of the description of the flower.

MO

Missouri Botanical Garden

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Asparagales

Family

Orchidaceae

Genus

Dendrobium

Loc

Dendrobium camaridiorum Rchb.f.

Pignal, Marc & Munzinger, Jérôme 2020
2020
Loc

Linnaea

Linnaea 41: 89