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Blechnum xiphophyllum x simillimum

Authors: Rakotondrainibe, France; Jouy, Alain; Meyer, Sylvie; Reeb, Catherine;

Blechnum xiphophyllum x simillimum

Abstract

Blechnum xiphophyllum × B. simillimum MATÉRIEL EXAMINÉ. — Madagascar.[MORamanga], Forêt d’Analamazaotra,ann. 1905, d’Alleizette 13 (P); Toamasina, Brickaville, Maroseranana, Fokontany Ambodilendemy, Andrangato river, 917 m, 20.III.2011, Antilahimena et al. 7673 (P); Tananarive, cultivée, en provenance de la forêt de Périnet, 800 m, Cremers 3521 (P); [Antsiranana, Andapa], Forêt d’Ambatosoratra, 1000 m, 08.I.1949, Cours 3408 (P); [Antsiranana, Andapa], Manantenina, versant sud du Beondroka, 930 m, 14.XI.1989, Deroin et Badré 86 (G, P); Nord-Est, Andapa, pentes occidentales du massif de Marojejy, 450-800 m, 28.XI-06.XII.1948, Humbert et al. 22125 (P); Andapa, massif de l’Anjanaharibe-Nord, 900-1000 m, 10.XII.1950 – 03.I.1951, Humbert et al. 24593 (P); Nord-Est, Andapa, partie occidentale du massif de Marojejy, 600-800 m, 09.XI.-02.XII.1959, Humbert et al. 31369 (P); S.loc., Humblot 307 p.p. (P); Toamasina, Maroantsetra; Andranobe, 600 m, 26.X.2004, Janssen et al. 2531 (P); Antsiranana, Andapa, Mandena, réserve de Marojejy, versant est, 700-850 m, 10.II.1989, Miller et al. 3919 (P); Centre, Bassin du haut Bemarivo, plateau d’Amberimay, vers 1000 m, ann. 1907, Perrier de la Bâthie 7695 (P); Centre, Haut Bemarivo, vers 1000 m, ann. 1907, Perrier de la Bâthie 7695 p.p. (P); Antsiranana, Ambanja, réserve du Manongarivo, mont Bekolosy, 500- 600 m, 24.I.1992, Rakotondrainibe 1398 (P), 1399 (P); Antsiranana, Andapa, réserve d’Anjanaharibe-Sud, 850 m, 19-24.X.1994, Rakotondrainibe et al.2088 (MO, P,TAN), 2197 (P); Fianarantsoa,Ambalavao,réserve de l’Andringitra, 720-800 m, 14-20.V.1995, Rakotondrainibe 2559 (P), 2672 (P); Antsiranana, Andapa, Manantenina, réserve du Marojejy, versant est, 520 m, 06.X.1996, Rakotondrainibe 3302 (P, TAN); Antsiranana, Andapa, Ambodiangezoka, forêt de Betaolana, 800-1360 m, 08-17.X.1999, Rakotondrainibe et al. 4832 (MO, P, TAN), 4998 (P); Fianarantsoa, forêt d’Andrambovato, à 2 km à l’ouest du village d’Andrambovato, au bord de la rivière Tatamaly, 1000 m, 18.X.2000, Rakotondrainibe et al. 6061 (P, TAN); Antalaha, péninsule Masoala, Ambohitralalana, à 2 km à l’est du village de Sahafary, 430 m, 25.II.2001, Rasolohery 326 (P); Maroantsetra, près du village de Sahafary, 11.II.1988, Simpson 88/20 (P); Toamasina, péninsule Masoala, Ambanizana, au bord de la rivière Androka, 0 m, VI.1993, Zjhra et al. 278 (G). DESCRIPTION Rhizome court, dressé ou subdressé, plus rarement long, grimpant sur les troncs (Rakotondrainibe et al. 4832 et 4998); frondes souvent en touffes ou espacées de 0,2-1,0 cm; écailles du rhizome toutes unicolores, brun clair (type B. simillimum) ou, en proportion variable, unicolores et bicolores avec une pseudonervure noire, étroite, et marge claire (type B. xiphophyllum). Frondes stérile et fertile dimorphes. Pétiole de la fronde stérile long de 14-31 cm portant à l’extrême base les mêmes écailles que le pétiole, nu au dessus ou portant quelques auricules très petites, espacées. Limbe stérile subcoriace, triangulaire ou lancéolé, long de 24-66 cm, pinnatiséqué à 1-penné; 7-40 paires de pennes; les proximales à base cunéiforme, libres ou partiellement adnées, les moyennes, de 9-17 × 1,1-2,5 cm, libres, partiellement adnées ou adnées sur toute leur largeur; les distales (au moins 5 paires, jusqu’à 22 paires) adnées sur toute leur largeur, à base contiguë. Nervures latérales des pennes simples ou bifurquées; hydathodes plus ou moins perceptibles. Fronde fertile de longueur inférieure, égale ou supérieure à la stérile; limbe 1-penné; pennes larges de 0,2-0,4 cm, entièrement recouvertes par les sporanges, indusies à marge entière. REMARQUE Voir la discussion sous B. xiphophyllum.

Published as part of Rakotondrainibe, France, Jouy, Alain, Meyer, Sylvie & Reeb, Catherine, 2013, Révision synoptique du genre Blechnum L. (Blechnaceae) à Madagascar, pp. 151-193 in Adansonia (3) (3) 35 (2) on pages 191-192, DOI: 10.5252/a2013n2a1, http://zenodo.org/record/5206321

Keywords

Tracheophyta, Blechnum, Blechnum xiphophyllum x simillimum, Polypodiales, Biodiversity, Polypodiopsida, Plantae, Blechnaceae, Taxonomy

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