Philodendron melinonii Brongn. ex Regel
  • Gartenflora 23: 67 (1874) 


Notes: Distribution: N. South America to N. Brazil

General Description

Rosulate epiphytic plant, stem ca. 5 cm in diameter, covered by a mass of brownish fibers derived from old prophylls. Roots adventitious, internodes very short. LEAF: Prophyll ca. 20 cm long, whitish with reddish lines, becoming wine-coloured when young, with angled keels, marcescent, persistent, forming a dense mass mixed in with young roots, giving the appearance of a ('Xaxim') [tree fern]. Petiole 36-41 cm long, 1-2.4 cm in diameter, more or less dark green, semiglossy, reddish towards the apex, especially in young leaves; sulcate on the adaxial surface, with raised margins, rounded on the abaxial surface, strongly spongy, with liberal viscous mucilage when broken, with small reddish extrafloral nectaries at the apex; sheath short or nearly absent. Leaf blade oblong-triangular in outline, apex slightly acuminate, base subcordate to emarginate; upper surface dark green, dull, margin light green, midrib lighter than lamina, primary lateral veins impressed; lower surface light green, dull, lighter than the lamina, midrib and primary lateral veins prominent, reddish when young, with very distinct resin lines. Anterior division 4[?]-46 cm long, 26-28 cm wide, primary lateral veins 8-9 on each side; posterior divisions short, acroscopic primary lateral veins 1, basioscopic 1. INFLORESCENCE: 1-2 per floral sympodium. Peduncle ca. 3.8 cm long, 1.5 cm in diameter, smaller than the spathe, with stripes and extrafloral nectaries absent. Spathe 14.8 cm long; tube 7.5 cm long, 2.5 cm in diameter, external surface cream, internal surface light green; blade 7.3 cm long, 3.8 cm in diameter at anthesis, external surface reddish, internal surface light green, resin canals absent in the tube and the blade. spadix ca. 10.4 cm long, subsessile, deeply decurrent; female zone 3 cm long, 1.8 cm in diameter, cylindric; intermediate sterile male zone 1.2 cm long, 1.3 cm in diameter, wider at the base; fertile male zone 6.2 cm long, 0.9 cm in diameter, cylindric, apex conical. Flowers: Stamens 3-4 per flower, 1.75 mm long, 1 mm wide; Staminodes 2.5 mm long, 1.25 mm wide. Gynoecia: 2.5-3 mm long; ovary 1.2 mm long, 1.5 mm wide, narrowed slightly at the base; locules 3-5 per ovary; ovules 10 per locule, each ca. 0.75 mm long, 0.25 mm in diameter; placentation sub-basal, biseriate; style 1 mm long, 1.5 mm wide; stigma 0.5 mm wide. INFRUCTESCENCE: Not seen.

Diagnostic Description

Similar to Philodendron fragrantissimum, but, it differs in its rosulate habit and without alternating between rosulate sections and elongate sections, and in the transverse section of the petiole, which is thicker, and sulcate on the adaxial side with keeled to winged margins, and rounded abaxially; the leaf blade is oblong-triangular in outline with a subcordate to emarginate base. In Philodendron fragrantissimum, the transverse section of the petiole is flatter and more triangular, and widely sulcate adaxially or flat with winged margins, and abaxially with central-rounded keels; the leaf blade is cordiform-subsagittate.

Habitat

Plant found on fallen tree or at over 6 m high, both in "mata de baixio" and in "floresta plato"

Distribution

Brazil (Amazonas, Pará and Roraima), Venezuela, French Guiana, Guyana, Surinam.

Distribution Map

 
  • Native distribution
Specimens
Found in
  • Southern America Brazil Brazil North
  • Northern South America French Guiana
  • Guyana
  • Suriname
  • Venezuela

  Bibliography

  • 1 Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
  • 2 Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • 3 Soares, Mde Lourdes Levantamento floristico do gênero Philodendron Schott (Araceae) da Reserva Florestal Ducke, Manaus, Amazonas. Unpubl. M.Sc. Dissertation. (1996).

 Information From

CATE Araceae
http://araceae.e-monocot.org
Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 14 Dec 2011 . 17 Dec 2011.
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eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
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World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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