Philodendron zhuanum Croat
  • Ann. Missouri Bot. Gard. 84: 564 (1997) 


Notes: Distribution: Panama (Coclé)

General Description

Hemiepiphytic, loosely or appressed-climbing; leaf scars conspicuous, 3 cm long, 2 cm wide; internodes semiglossy, 2--4 cm long, 3--5.5 cm diam., dark green, drying dark brown, longitudinally wrinkled; roots drying light brown and weakly glossy, finely striate, epidermis peeling; cataphylls 37--50 cm long, sharply 2-ribbed, medium green, semiglossy, drying dark brown, deciduous. LEAVES: Petioles 40--63 cm long (0.8--1.5 times longer than blades), bluntly D-shaped, faintly raised medially, moderately firm, medium green, surface dark green short-lineate, drying dark yellowish brown and glossy, prominently flattening to 3--6 cm wide and only a few mm thick, smooth to finely and closely striate; sheath 3--6 cm long, moderately closed; blades narrowly ovate-sagittate, moderately coriaceous, acuminate at apex, conspicuously sagittate at base, 38--62 cm long, 27--32 cm wide, (1.8--2 times longer than wide), margins broadly undulate, much paler than surface, upper surface dark green, glossy, drying dark yellowish brown, lower surface weakly glossy, paler, drying reddish brown to yellowish green with conspicuous, dark intermittent secretory canals visible; anterior lobe 34--35 cm long, margins broadly convex, paler; posterior lobes 8.5--18.5 cm long, 7--13 cm wide, directed downward to slightly inward, broadly rounded; sinus narrow, spathulate to narrowly obovate, (7.5)15--19 cm deep, 1--3 cm wide; major veins drying with sharp ridges, usually darker than surface; midrib flat, paler than surface above, narrowly rounded, concolorous below; basal veins (3)5--6 per side, with the first free to base numbers 3--5 coalesced (2)5--7 cm; posterior rib not at all naked or naked to 2.5 cm; primary lateral veins 6--7 per side, arising at an acute angle then spreading to a 40--45º angle, weakly arcuate until near the margin, then turned up abruptly, weakly sunken above, convex, paler than surface below; minor veins clearly visible, arising from both the midrib and primary lateral veins, drying prominulous above, faint and weakly wrinkled below. INFLORESCENCES 3 per axil; peduncle 9--14 cm long, 1--1.5 cm diam., somewhat flattened, medium green, faintly short-lineate; spathe 13--18.5 cm long, margins paler; spathe blade white, except yellow-green medially on back side outside, tinged magenta on lower one-third inside; spathe tube medium green outside, dark violet-purple inside, spadix 11.5--18 cm long; pistillate portion creamy green, 3.5--8 cm long, 3--6 cm long in back, 1.5 mm diam. at apex, 1.9 mm diam. at middle, 1.8 mm wide at base; staminate portion 8--10 cm long; fertile staminate portion slightly narrower than the pistillate portion; sterile staminate portion barely distinguishable when fresh, 1.2--1.3 cm diam. at base, tapered only slightly upward when fresh (drying to 10 mm diam. at apex); pistils 1.9--2.1 mm long, 1.2--1.6 mm diam.; ovary 8--9-locular, 0.8 mm long, with basal placentation; locules 0.8--1.2 mm long; ovules 1--3 per locule, translucent, contained within gelatinous matrix (no true envelope), 0.3--0.4 mm long, equal in length to funicle, style similar to style type B; stylar canals emerging directly onto surface; style apex truncate; stigma short, covering entire style apex; the androecium truncate, margins irregularly 4--6 sided, 0.8--1.2 mm diam. at apex; sterile staminate flowers irregularly rounded, 0.8--1 mm wide.

Habitat

Premontane rain forest.

Distribution

Endemic to Panama in Coclé Province.

Distribution Map

 
  • Native distribution
Found in
  • Southern America Central America Panamá

  Bibliography

  • 1 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.
  • 2 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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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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