Philodendron roseopetiolatum Nadruz & Mayo
  • Bol. Bot. Univ. São Paulo 17: 55 (1998) 


Notes: Distribution: Brazil (Rio de Janeiro)

General Description

Hemi-epiphytic vine. Stem: green apex becoming chestnut-coloured or sometimes greyish in the mature parts, internodes 2.5-5 cm long. Prophyll 13.5-15 x 1.3 cm, narrowly triangular, greenish-cream. LEAVES: Petiole 30-50 cm long, with apex reddish to vinaceous and green at base with vinaceous grooves. Leaf blade 31-40 x 18.5-21, ovate to broadly ovate, apex acute, base cordate-sagittate, distinctly paler on lower surface, margin vinaceous, chartaceous to subcoriaceous; anterior division 20-26 x 18.5-21 cm, primary lateral veins 4 per side; posterior divisions 11.5-12.5 x 12-15 cm, acroscopic vein 1 per side, basiscopic vein 1 per side; basal veins 6-7, none or rarely 1 free to base; posteriror rib naked for 1-1.5 cm. INFLORESCENCE: 1-4 per floral sympodium, peduncle 3.5-5 cm long, greenish-vinaceous, with red apex. Spathe 15-19.5 x 0.9-1.1 cm, narrowly ovate, weakly constricted, outside greenish-vinaceous, with vinaceous staining at the base, inside red at the base and white on the blade. Spadix 12.5-17 cm long, male zone 3.7-4.5 cm long, cream; intermediate male sterile zone 1-1.4 cm long, white; apical male sterile zone 3.5-4.5 cm long, cream; female zone 5-6.5 cm long, greenish. Flowers: stamens 1-1.5 x 0.7-1 mm; intermediate staminodes 1.8-3.5 x 1.6-3 mm; apical staminodes 1.5-2 x 1-1.8 mm; gynoecium 2-2.5 x 1.5-2 mm, bottle-shaped, ovary 7-9-locular, ovules 3-4 per locule, placentation sub-basal. INFRUCTESCENCE: Berries immature, 3.2-4 x 2.5-3.5 mm, yellowish-green; seed 0.4 cm long, fusiform, white.

Habitat

Hemi-epiphytic in tropical forest areas.

Distribution

Southeastern Brazil, Rio de Janeiro state, apparently endemic to Macaé de Cima.

Conservation

Critically Endangered (CR), B1, a, b (i, iii); extent of occurence < 100 km 2. Only known from the type locality, where it was studied in the field by the first author. Subpopulations of this taxon are protected within the Reserva Ecológica de Macaé de Cima.

Distribution Map

 
  • Native distribution
Found in
  • Southern America Brazil Brazil Southeast

  Bibliography

  • 1 Sakuragui, C.M., Mayo, S.J. & Zappi, D.C. (2005). Taxonomic revision of Brazilian species of Philodendron. Kew Bulletin 60: 465-513.
  • 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 Sakuragui, C.M., Mayo, S.Joseph & Zappi, D.C. Taxonomic revision of Brazilian species of Philodendron section Macrobelium Kew Bull. 60, (2005).

 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
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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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