Philodendron oblanceolatum Croat & D.C.Bay
  • Novon 18: 442 (2008) 


Notes: Distribution: Colombia

General Description

Hemiepiphytic, rarely terrestrial; appressed-climbing or scandent; internodes short, obscured by cataphyll fibers and roots, 1–5.5 cm x 0.4–3.5 cm, longer than broad, drying medium brown with flaky epidermis; roots several per node, drying light to medium brown; cataphylls to 12 cm, sharply 1- to 2- ribbed near apex, flattened on one side, pale green, drying medium tan or pale brown, bases persisting somewhat intact at upper nodes. LEAVES spreading; petioles firm, 1.5–11 cm x 5–10 mm (dry), terete, broadly rounded adaxially, narrowly rounded abaxiallly,
medium green, matte, drying dull, medium olive-green; blades upright to spreading, clustering at the top of the stem, subcoriaceous, oblong- obovate, acuminate at apex, narrowly rounded at base, 24.5–78 x 5.5–21.5 cm,   (3.1–)3.3–3.9(–4.4)x longer than wide, (4.2–)6.6–11.8(–25)x longer than petiole, broadest at or above middle, margins rounded in distal half, concave in proximal half, adaxial surface semiglossy, dark green, drying dull and dark olivegreen, abaxial surface matte, paler than adaxially, drying glossy and reddish brown; midrib broadly convex at base to narrowly  sunken at apex, marginally discolored, drying darker than blade adaxially, bluntly angular and drying darker than blade abaxially; primary lateral veins 20 to 29 per side, 5–23 mm apart, spreading from midrib at 50º–60º angles, slightly downturned at midrib, proceeding straight out to within 1.5 cm of margin, then curving sharply toward apex, sunken adaxially, raised abaxially, drying concolorous or darker than blade adaxially, darker than blade abaxially; minor veins and minute cross veins clearly visible abaxially, departing from both midrib and primary lateral veins, drying obscure adaxially, darker than blade abaxially, with many, often interrupted, secretory canals clearly visible abaxially. INFLORESCENCE erect, solitary; peduncle 1–4 cm x 4–8 mm (dry), shorter than petiole, drying medium brown; spathe long-tapered, 12–18 cm, medium green, not constricted; spathe blade 6.5– 11 cm, white inside; spathe tube 4–7 cm, dark maroon inside, drying dull medium brown; spadix sessile, 10–14 cm, white; pistillate portion 1.5–4 cm, slightly ellipsoid, to 1.1 cm diam. at widest point; staminate portion oblong, 5–9 cm, to 1.3 cm diam. near middle (dry), narrower than pistillate portion; sterile staminate portion not apparent; pistils ca. 1.3 x 0.8 mm; ovary 4- to 5-locular, ovules with axile placentation, 20 to 30 per locule. INFRUCTESCENCE unknown. JUVENILE PLANTS creeping, internodes 1–4 cm, 4 mm diam.

Diagnostic Description

The species is a member of subgenus Philodendron, section Philodendron, subsection Canniphyllum (Schott) Mayo and is characterized by its hemiepiphytic habit, short internodes obscured by cataphyll bases, and leaves that cluster at the top of the stem. It also has rather large leaf blades with a distinctive oblanceolate shape for which it is named. The leaf blades are also distinctive in showing obvious secretory canals below when dry and in being held erect or spreading on very short petioles, and the inflorescences are long, tapered, green and maroon within the spathe tube. One collection, Cuatrecasas 16406, noted that the spadix had an intense, unpleasant odor.

Habitat

It occurs in Tropical rain forest transition to Premontane (T-rf/P), below 150 m, and has been collected from primary forest and regrowth forest.

Distribution

Philodendron oblanceolatum is endemic to Colombia and is known only from the western slopes of the Cordillera Occidental, in the Bajo Calima region.

Conservation

IUCN Red List category. Conservation for Philodendron oblanceolatum must be considered as Near Threatened (NT) according to IUCN Red List criteria (IUCN, 2001).Although locally common in the Bajo Calima region, it is not yet known from other sites in Colombia.

Distribution Map

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

  Bibliography

  • 1 Govaerts, R.H.A. (2011). World checklist of selected plant families published update. Facilitated by the Trustees of the Royal Botanic Gardens, Kew.
  • 2 Croat, T.B., Bay, D.C. & Yates, E.D. New Species of Philodendron (Araceae) from Bajo Calima, Colombia. Novon; a Journal for Botanical Nomenclature. St. Louis, MO 18, 452 (2008).

 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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