Philodendron mcphersonii Croat
  • Willdenowia 40: 115 (2010) 


Notes: Distribution: Colombia

General Description

Thick-stemmed epiphyte on tree trunk; stems with mucilaginous, reddish-brown latex; internodes short, c. 5 cm diam., drying dark brown; cataphylls 2-ribbed, c. 42 cm long, drying dark brown, deciduous. Leaves large; petiole terete with tiny ridges, sulcate at the base, 67–99 cm long, c. 1.5 cm diam., drying dark brown, sheathing to c. 6 cm; blade ovate-sagittate, 84–99 cm long, 60–74 cm wide, 1.3–1.4 × longer than wide, 1–1.3 × as long as petiole, abruptly long-acuminate at apex, conspicuously lobed at base, subcoriaceous, drying dark grey-green above and light grey-green below, matte on both sides, often ripping apart along some minor veins upon drying; anterior lobe 46–69 cm long, broadly convex along the margins; posterior lobes 20–30 cm long, 21–31 cm wide, extending inward and sometimes overlapping; sinus broadly spathulate, 21–31 cm deep, 6–9 cm wide; midrib prominent, flattened and slightly lighter than the blade above, rounded and dark yellow-brown below; primary lateral veins 5–6 pairs, arising at 60–85º angle, flattened above and  rounded below, concolorous with midrib; basal veins 9 pairs, the 1st pair free to the base, the remaining fused to various extent and branching at various intervals on both sides of the posterior rib; posterior rib thick, free for c. 7 cm and then extending and branching inside the posterior lobe; minor veins numerous and conspicuous, arising from both the midrib and the primary lateral veins and forming a dense network of closely parallel finely raised veins covering the surface of the blade. Inflorescences 3 per axil; peduncles 10–14 cm long, 4–5 mm diam., drying dark brown; spathe 10–15 cm long, 2.5–3.5 cm diam., tube red, blade  white; spadix 12–13 cm long, slightly shorter than spathe, green or white; staminate portion 5–6 cm long, 1–1.5 cm diam.; sterile portion 0–1.2 cm long, 6–8 mm diam.;  pistillate portion 5.5–7.5 cm long, 2–2.5 cm diam.; pistils 4.5–5 mm long, 3.5–4 mm diam., stigma 1.5 mm wide, 0.3 mm thick; locules 5, ovules 5–8 per locule with axile placentation, branching from a single point on the midportion of the locule, 0.15 mm long; seeds cylindrical, 1–1.5 mm long, constricted near the apex.

Diagnostic Description

The species is a member of Philodendron subg. Philodendron sect. Philodendron subsect. Philodendron series Philodendron and is characterised by its epiphytic habit, short thick internodes, 2-ribbed, deciduous cataphylls, terete petioles with tiny ridges and drying dark brown, large ovate-sagittate matte blades, which dry grey-green above with finely raised veins and grey-green below with dark yellow-brown major veins on lower surface, as well as by its clusters of up to 3 inflorescences per axil with green or red and white spathes.


Philodendron mcphersonii somewhat resembles P. zhuanum Croat of Panama, but that differs by its larger and broader leaves (blade length/width ratio of 1.3–1.4 for P. mcphersonii versus 1.8–2 for P. zhuanum), its strong posterior rib naked to 7 cm, and its somewhat smaller inflorescences.

Habitat

Premontane rain forest, Tropical moist forest and Tropical wet forest transition life zones.

Distribution

Endemic to Colombia (Antioquia).

Distribution Map

 
  • Native distribution
Specimens
Found in
  • Southern America Western South America Colombia

  Bibliography

 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.
  • A All Rights Reserved
Global Biodiversity Information Facility
http://data.gbif.org
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eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
  • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
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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