Philodendron angustilobum Croat & Grayum
  • Ann. Missouri Bot. Gard. 84: 396 (1997) 


Notes: Distribution: C. America

General Description

Hemiepiphytic; stem appressed-climbing, growing to 2.5-6 m high in trees; internodes matte to weakly glossy, 3-6(15) cm long, 1.5-3 cm diam., dark green, drying gray (within 4-6 internodes), epidermis drying light brown, semiglossy, often peeling (underlying stem blackened), fissured transversely, longitudinally ridged; cataphylls soft (especially near base),12-33 cm long, bluntly to sharply 2-ribbed or sharply 1-ribbed to near the apex then 2-ribbed below, green, sometimes tinged red, deciduous, persisting deciduous, intact; LEAVES: petioles 17-54 cm long, 5-10 mm diam., subterete, somewhat spongy, dark green, weakly flattened toward apex with an obscure medial rib adaxially, with adaxial margins rounded to weakly angular, surface weakly glossy, drying blackened; sheathing 3-9 cm long; blades deeply 3-lobed, subcoriaceous, moderately to conspicuously bicolorous, 30-48 cm long, 20-48 cm wide (1-1.5 times longer than wide), (0.8-1.8 times longer than petioles), upper surface dark green, drying dark gray to dark brown, semiglossy, lower surface drying dark yellow-brown to dark gray-brown, weakly glossy, moderately paler; anterior lobe 28-39 cm long, 8.5-14(17) cm wide (1.8-1.9 times longer than lateral lobes), rarely broadest at the base, usually narrowed toward the base (4-12 cm wide just above the base); sinus arcuate to broadly V-shaped; lateral lobes (7.5)15-22(27) cm long, 3-8(12) cm wide, broadest usually toward the apex, directed outward, broadly spreading (90 -127º angle), broadly confluent with medial lobe 3.3-6.5 (rarely to 14) cm, acute; midrib broadly convex to flat-sunken above, convex, slightly paler than surface, drying blackened below; basal veins 8-10 per side, pinnately arranged along a stout medial rib; posterior rib not at all naked or rarely naked for 1-1.5 cm; primary lateral veins 5-6 per side (45-75º angle on median lobe), gradually curved to the margins, sunken above, convex, drying blackened below; interprimary veins weakly raised and darker than surface below; minor veins distinct, darker than surface below, arising from both the midrib and primary lateral veins. INFLORESCENCES 1-3 per axil; peduncle (4.5)9-11(15) cm long; spathe (11)13-18 cm long, 8-10 mm diam. (1.4-1.6(2.4) times longer than peduncles), greenish white outside, greenish white to white within; spathe opening broadly at anthesis, convolute in only lower one-half of tube, barely or not at all constricted above the tube; spathe blade sometimes tinged white outside; spathe tube light green, sometimes tinged maroon at base outside, spadix held erect, not protruded forward, oblong to oblong-tapered, rounded to bluntly acute at apex, (9.5)11-15.5 cm long, broadest near the middle constricted weakly above sterile staminate portion; pistillate portion pale green, oblong to oblong-tapered, 4.5-5.7 cm long, 8-10 mm diam. at apex, 8-12 mm diam. at middle, (5)11-13 mm wide at base; staminate portion 8-11 cm long; fertile staminate portion oblong-tapered, 8-13 mm diam. at base, (6)12-13 mm diam. at middle, 8-9 mm diam. ca. 1 cm from apex, usually broader than the pistillate portion; sterile staminate portion ca. 1 cm diam.; pistils 1.5-3 mm long, 1.1-1.8 mm diam., ovary 7-10-locular, (0.8)1.1 mm diam., with sub-basal placentation; ovules 1(2) per locule, contained within transparent ovule sac, 0.6 mm long, usually shorter than funicle, style similar to style type B; style apex rounded; stigma button-like, subdiscoid, 1 mm diam., 0.2-0.4 mm high, covering center of style apex; thecae oblong to oblong-ovate, contiguous, sometimes divaricate. JUVENILE plants with petioles 8-10 cm long; blades, oblong, rounded to weakly subcordate.

Habitat

Tropical wet forest and Premontane wet forest life zones.

Distribution

Ranges from Honduras (Olancho) to Panama, apparently being restricted to the Atlantic slope from Honduras to Costa Rica.

Distribution Map

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

  Bibliography

  • 1 Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
  • 2 Hammel, B.E. & al. (2003). Manual de Plantas de Costa Rica 2: 1-694. Missouri Botanical Garden Press, St. Louis.
  • 3 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.
  • 4 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.
  • 5 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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World Checklist of Selected Plant Families
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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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