Philodendron pterotum K.Koch & Augustin
  • Index Seminum (B) 1854(App.): 6 (1855) 


Notes: Distribution: C. America

General Description

Usually hemiepiphytic or epiphytic; stem appressed-climbing, semiglossy, sap watery, weakly turpentine-scented, leaf scars conspicuous, 2 cm long, 1 cm wide; internodes sometimes obscured by cataphylls, sparsely short-striate, about as long as broad or sometimes longer than broad, 2--8 cm diam., dark green to gray-green, eventually brown, epidermis sometimes cracking, fissured longitudinally; roots short, few per node; cataphylls 20--30 cm long, sharply 2-ribbed, C-shaped, semiglossy, dark green, densely pale lineate, persisting as reddish brown, semi-intact fibers, eventually deciduous. LEAVES: petioles (37)47--111 cm long, (3-5)6--13(16--22) mm diam., erect-spreading, D-shaped, marginally winged, broadly convex adaxially, with adaxial margins slender, erect, undulate, medium green, weakly glossy, conspicuously pale striate; sheath with margins involute; blades ovate, subcoriaceous, semiglossy, moderately bicolorous, abruptly acuminate at apex (the acumen inrolled, 2--4(6) mm long), broadly cordate at base, 36--93 cm long, 22--84 cm wide (0.7--1.5(2.9) times longer than wide), (0.6--0.9 times the petiole length), margins weakly undulate, upper surface dark green, lower surface much paler, glossy, drying yellow-green; anterior lobe 23.5--65(84) cm long, 22.1--75(86.4) cm wide (1.1--2.8 times longer than posterior lobes); posterior lobes 12--33 cm long, (11)15--34 cm wide, directed inward, broadly rounded to broadly obtuse; sinus spathulate to rhombic; basal veins 7--10 per side, first free to base, part of remainder coalesced 1--6 cm, loosely so distally; posterior rib naked to 6 cm; midrib flat to broadly sunken, paler than surface above, convex to narrowly rounded, paler than surface below; primary lateral veins 3--6 per side, departing midrib at a 45--55º angle, more or less straight to weakly arcuate to the margins, deeply sunken, paler than surface above, raised to convex, paler than surface below; interprimary veins weakly raised, darker than surface below; the minor veins moderately distinct, arising from both the midrib and primary lateral veins. INFLORESCENCES erect, 2--4 per axil; peduncle (2)4--12 cm long, 4--13 mm diam., medium green, coarsely white streaked toward apex; spathe 11--29 cm long (1.4--3.8(5) times longer than peduncle), more or less cuspidate at apex; spathe blade light green outside, greenish white inside; spathe tube abruptly delineated from tube, reddish to purplish to dark purple-violet (B & K purple 2/10) or dark green and raised-white-striate at base outside, red to magenta inside; spadix weakly stipitate, exserted from the spathe, constricted above sterile staminate portion; pistillate portion pale green, 4.3 cm long in front, 3.8 cm long in back, 2 cm diam. at apex, 1.7 cm wide at base; staminate portion 16--18 cm long; fertile staminate portion white, 1.7 cm diam. at middle; sterile staminate portion 1.4--2.2 cm diam.; pistils 2.2--2.8 mm long, 1.1--1.4 mm diam.; ovary 6-locular, with axile placentation; locules 1.5--1.9 mm long, 0.4 mm diam.; ovules ca. 20 per locule, 2-seriate, somewhat translucent, 0.2--0.3 mm long, longer than funicle; funicle 0.1--0.2 mm long, adnate to lower part of partition, style similar to style type B; style apex flat to weakly rounded; stigma subdiscoid to weakly hemispheroid, sometimes weakly lobed, 1.5 mm diam., 0.5 mm high, covering entire style apex; the androecium truncate, prismatic, margins irregularly 4--6-sided, 0.7--1.5 mm long; thecae oblong, 0.4 mm wide, not contiguous, more or less parallel to one another; sterile staminate flowers irregularly 4--5-sided, 1.5--2.5 mm long. INFRUCTESCENCE with spathe green at base and tip, purple around fruiting area when ripe, berries pale brown to white. JUVENILE and PRE-ADULT plants with petioles flattened adaxially; blades broadly ovate. PRE-ADULT blades broadly ovate, 28.5 cm long, 22.5 cm wide.

Habitat

Tropical moist forest and Tropical wet forest life zones. In Nicaragua, it occurs only on the Atlantic slope, but in Costa Rica and Panama, it occurs on both slopes.

Distribution

Ranges from Nicargua to Central Panama. In Nicaragua, it occurs only on the Atlantic slope, but in Costa Rica and Panama, it occurs on both slopes.

Distribution Map

 
  • Native distribution
Specimens
Found in
  • Southern America Central America Costa Rica
  • Nicaragua
  • Panamá

  Bibliography

  • 1 Hammel, B.E. & al. (2003). Manual de Plantas de Costa Rica 2: 1-694. Missouri Botanical Garden Press, St. Louis.
  • 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 Stevens, W.D., Ulloa U., C., Pool, A. & Montiel, O.M. (2001). Flora de Nicaragua. Monographs in Systematic Botany from the Missouri Botanical Garden 85: i-xlii, 1-2666.
  • 4 Croat, T.Bernard A revision of Philodendron subgenus Philodendron (Araceae) for Mexico and Central America Ann. Missouri Bot. Gard. 84, (1997).

 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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Global Biodiversity Information Facility
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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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