Anthurium panduratum Man. ex Schott. Oesterr. Bot. Wochenbl. 5: 273. 1855- type Brazil. Río Negro, Martius 3115 (M, not seen: US. photo).
Anthurium holtonianum Schott, Oesterr. Bot. Wochenbl. 7: 317. 1857. type Colombia. La Paila, Holton s.n. (K, not seen SEL photo).
Anthurium repandum Schott, Oesterr. Bot. Wochenbl. 7: 317. 1857. TYPE: Colombia. Santa María, furdie s.n. (K, not seen: SEL photo).
Anthurium wendlandii Schott, Oesterr. Bot. Z. 8: 182. 1858. TYPE: Costa Rica. San Miguel, Wendland957 (GOET).
Anthurium kalbreyeri N. E. Brown, Gard. Chron. pt. 2: 117. 1881. TYPE: Colombia. Antioquia, Kalbreyer s.n. (K, not seen). '
Anthurium burchellianum (Engl.) Macbr., Field Mus. Nat. Hist., Bol.Ser. 11:7. 1931.
Anthurium pandwatum var. burchellianum Engl., Pflanzenr. IV 23 B: 279. 1905. TYPE: Brazil. Para,m Burchell 9632 (K, not seen).
Anthurium obovatum Gleason, Bull. Torrey Bot. Club 56: 9. 1929. TYPE: Br. Guiana. Kopinang River, Anandabaru, Alston 475 (K, not seen; F, photo).
Anthurium monteroides Steyerm., Fieldiana, Bot. 28: 93.1951. TYPE: Venezuela. Merida: Río Onia near Bolero, N. of Mesa Bolívar, Steyermark 56727 (F).

LEAVES erect-spreading; petiole 65-150 cm long, terete or weakly sulcate; geniculum 1.5-2 cm long; blades digitately discoid to reniform in outline, to 2 m wide, the leaflets 25-100 cm or more long, 4-12 cm wide, sinuate or lobate, acuminate at apex, acute at base, the upper surface matte, the lower surface semiglossy; the midrib of the leaflets convexly raised above and below, diminished and sunken at apex above; the primary lateral veins 3-4 per side, raised in valleys above, raised below, departing midrib at 45° angle, arcuate-ascending to form collective vein in apical portion of leaflet.

INFLORESCENCE arching-pendent; peduncle to 90 cm long, terete, shorter than petioles; spathe coriaceous, violet-purple, lanceolate, 30-65 cm long, 3-11 cm wide; spadix lavender-purple (B & K Purple 6/2.5), 20-75 cm long, to 2 cm diam. at base, to 9 mm diam. At apex; flowers rhombic, ca. 3 mm in both directions, the sides straight to slightly sigmoid; ca. 14 flowers visible in the principal spiral, ca. 8 flowers visible in the alternate spiral; tepals matte; pistil emergent but not raised, lavender; stigma linear, darker purple than pistil; stamens emerging from base, covering pistil; anthers purplish-brown; thecae irregular, not divaricate; pollen while to pinkish.

INFRUCTESCENCE pendent; berries obovate, purple, developing in basal portion only, seeds 1-2, white, oblong. Figs. 49 and 50.

Anthurium clavigerum is found from Nicaragua to the Guineas, Brazil, and Bolivia. In Costa Rica it occurs in premontane wet forest and tropical wet forest life zones at sea level to 700 m. In Panama, the species also occurs in premontane moist forest and tropical moist forest. It has also been collected at a reportedly 1,000 m elevation in what is apparently lower montane wet forest or lower montane rain forest.
This species is not confused with any other in Central America and can be recognized by its pedalisect leaves with sinuate to lobed margins and by its huge pendent inflorescence. The species may have leaf blades to about 2 m broad making it the largest species of Anthurium in Central America. It is a member of section Dactylophyllium and is most closely related to A. sinuatum Benth. ex Schott of South America.

Map of Mesoamerican specimens with coordinates

Costa Rica Alajuela:, , Molino et al. 17843 (F, NY).
Costa Rica Alajuela:, , Thomas B. Croat 36291 (MO).
Costa Rica Alajuela: Río Zapote,, , Burger & Baker 9963 (F, MO).
Costa Rica Alajuela:, , Almeda & Nakai 4002 (MO).
Costa Rica Alajuela: Volc?aacute;n Arenal,, , Lent 2672 (F, MO).
Costa Rica Alajuela: 500 m, 10.55N 85.20W, 4 November 1987, Gerardo Herrera 1113 (MO).
Costa Rica Alajuela: R.F. San Ramón; Cordillera de Tilarán, 1100-1200 m, 10.12.55N 84.36.25W, 20 May 1993, Flor Araya, Morales, Guzmán, Segura & Gutiérrez 322 (CR).
Costa Rica Guanacaste: 450 m, 10.40.00N 84.04.30W, 25 January 1985, Michael Grayum, G. Herrera, O. Segura & P. Sleeper 4914 (MO).
Costa Rica Guanacaste: Cordillera de Tilarán, 800 m, 10.35.50N 85.01.10W, 26 October 1993, Gladys Rodriguez, A. Jiménez & Denia Ramírez 235 (CR, MO). Costa Rica Lim—n: 10-40 m, 10.40N 83.40W, 13-14 Sep 1986, Warren Douglas Stevens 24319 (MO).
Costa Rica Lim—n: 20-170 m, 10.41N 83.38W, 15-20 Sep 1986, Warren Douglas Stevens 24448 (MO).
Costa Rica Lim—n: 20-170 m, 10.41N 83.38W, 16-23 Jan 1986, Warren Douglas Stevens 23887 (MO).
Costa Rica Lim—n: 70-150 m, 9.30.10N 82.57.50W, 1 July 1989, Abelardo Chacón 75 (MO).
Costa Rica Lim—n:, , Thomas B. Croat 43244 (MO). Costa Rica Lim—n:, , Davidson et al. 7135 (LAM).
Costa Rica Lim—n:, , Donahue 8500 (MO). Costa Rica Lim—n:, , Baker & Burger 176 (DUKE, F, MO, NY).
Costa Rica Lim—n: 850 m, 9.47.50N 83.05.30W, 6 April 1989, Rafael Robles & Abelardo Chacón 2672 (MO).
Costa Rica Lim—n: 10-20 m, 10.40N 83.40W, 13-14 Sep 1986, Gerrit Davidse & Gerardo Herrera 31057 (MO).
Costa Rica Lim—n: 10-80 m, 10.40.30N 8.39.30W, 17-18 Sep 1986, Gerrit Davidse & Gerardo Herrera 31327 (MO).
Costa Rica Lim—n: 40 m, 10.25N 83.34W, 31 October 1987, Rafael Robles 1197 (MO).
Costa Rica Lim—n: 70 m, 10.27N 83.34W, 19 January 1988, Rafael Robles 1545 (MO).
Costa Rica Lim—n: R.B. Hitoy Cerere; Valle de la Estrella, Río Cerere, 100-798 m, 09.40.20N 83.03.00W, 12 December 1993, Alvaro Fernandez 1244 (CR).
Costa Rica Puntarenas: 150-260 m, 8.41N 83.32W, 3 March 1985, T.B. Croat & M.H. Grayum 59750 (MO).
Costa Rica Puntarenas: 60 m, 8.34N 83.25W, 4 March 1985, T.B. Croat & M.H. Grayum 59817 (MO).
Costa Rica Puntarenas:, , Burger & Matta 4770 (F, NY).
Costa Rica Puntarenas:, , Liesner 2153 (MO, WIS).
Costa Rica Puntarenas:, , Raven 20864 (CAS, NY).
Costa Rica Puntarenas: Río Piro, 20 m, 08.25.50N 83.20.25W, 16 Sep 1990, Herrera 4302 (CR, MO, CR).
Costa Rica Puntarenas: P.N. Corcovado; Península de Osa, 10 m, 08.28N 83.35W, 10 October 1993, Reinaldo Aguilar 2417 (CR).
Costa Rica Puntarenas: P.N. Corcovado; Península de Osa, 200 m, 08.34N 83.31W, 21 December 1993, Reinaldo Aguilar & V. Guzmán 2796 (CR).
Costa Rica Puntarenas: P.N. Corcovado; Península de Osa, 10 m, 08.28N 83.35W, 30 November 1990, Gilberto Fonseca 43 (CR).
Honduras Gracias a Dios: 100 m,, 5-13 May 1985, Nelson & Cruz 9175 (TEFH, UNAH).
Nicaragua Chontales: 250 m, 12.18N 85.07W, 6 Abril 1984, A. Grijalva & D. Soza 3746 (MO).
Nicaragua Chontales: 280 m, 12.17N 85.06W, 10 mayo 1984, D. Soza 32 (MO).
Nicaragua Matagalpa: Cerro Musun, 500-800 m,, 15 May 1980, Araquistain, M. & Moreno, P. 2569 (MO).
Nicaragua Matagalpa: Cerro Musun, 200-500 m, 13.00-01N 85.14W, 16 May 1980, Araquistain, M. & Moreno, P. 2762 (MO).
Nicaragua Matagalpa: 200-400 m, 12.55N 85.14W, 17 marzo 1984, Pedro P. Moreno 23553 (MO).
Nicaragua Río San Juan: 40-60 m, 11.14N 84.26W, 30 Nov-2 Dec 1984, Warren Douglas Stevens 23429 (MO).
Nicaragua Río San Juan:, , Neill 3378 (MO). Nicaragua Río San Juan: El Castillo, 11.02N 84.24W, 04 Sept. 1990, Salick, J. 7842 (MO).
Nicaragua Río San Juan: 70-100 m, 11.03N 84.27W, 14 marzo 1987, Pedro P. Moreno 26776 (MO).
Nicaragua Río San Juan: 10.55N 83.49W, 4 Julio 1994, Ricardo Rueda, Blas Hernández y Edith Palma 1703 (MO).
Nicaragua Río San Juan: 11.02N 083.54W, 30 Julio 1996, Ricardo Rueda, Indiana Coronado y Norlan Tercero 4683 (MO, WU).
Nicaragua Río San Juan: 120 m, 11.01N 084.14W, 4 Enero 1997, Ricardo Rueda, Indiana Coronado, Oscar Aráuz & Franklin Flores 5374 (MO).
Nicaragua Río San Juan: 11.09N 084.11W, 22 Febrero 1997, Ricardo Rueda, Indiana Coronado, Oscar Aráuz & Franlkin Flores 6242 (MO).
Nicaragua Zelaya: 13.40.30N 85.45.40W, 26 Octubre 1982, A. Grijalva & F. Burgos 1560 (MO).
Nicaragua Zelaya: 13.30.20N 84.45.25W, 28 Octubre 1982, A. Grijalva & F. Burgos 1711 (MO).
Nicaragua Zelaya: Río Escondido,, , Harmon & Fuentes 5083 (MO).
Nicaragua Zelaya:, , Neill 1818 (MO).
Nicaragua Zelaya:, , Stevans 6882 (MO).
Nicaragua Zelaya: Cerro Saslaya,, , Stevans 7067 (MO).
Nicaragua Zelaya:, , Stevans 4856 (MO).
Nicaragua Zelaya: Río Suio,, , Stevans 8028 (MO).
Nicaragua Zelaya:, , Stevans 7904 (MO).
Nicaragua Zelaya: Río Okanwas,, , Neill 4433 (MO).
Nicaragua Zelaya:, , Neill 3727 (MO).
Nicaragua Zelaya: ca. 200-300 m., 11.36N 84.22W, 13-14 Feb. 1978, Pipoly 2001 (CAS).
Nicaragua Zelaya: 750 m, 13.46N 84.59W, 10 Apr. 1979, Pipoly, J. 5080 (MO).
Nicaragua Zelaya: 200 m, 14.40N 84.07W, 02 Mar. 1979, Pipoly, J. 3765 (MO).
Nicaragua Zelaya: Cerro Waylawas, 100-200 m, 13.38N 84.48W, 10 Mar. 1979, Pipoly, J. 4297 (MO).
Nicaragua Zelaya: Kururia, 50 m, 14.41N 84.04W, 03 Mar. 1979, Pipoly, J. 3977 (MO).
Nicaragua Zelaya: Kururia, 50 m, 14.41N 84.04W, 03 Mar. 1979, Pipoly, J. 3990 (MO).
Nicaragua Zelaya: Danli, 100-130 m,, 31 Sept. 1982, Ortiz, F. 234 (MO).
Nicaragua Zelaya: Waspado, 100-200 m,, 06 Oct. 1982, Ortiz,F. 298 (MO).
Nicaragua Zelaya: El Hormiguero, 100 m,, 05 Feb. 1983, Ortiz, F. 833 (MO).
Nicaragua Zelaya: Cerro Waylawas, 100-200 m, 13.38N 84.49W, 12 Mar. 1979, Pipoly, J. 4548 (MO).
Nicaragua Zelaya: Wani, 0-100 m, 13.42N 84.50W, 16 Mar. 1979, Pipoly, J. 4702 (MO).
Nicaragua Zelaya: Cerro Waylawas, 100-200 m, 13.30N 84.48W, 09 Mar. 1979, Pipoly, J. 4216 (MO).
Nicaragua Zelaya: 10 m, 11.35N 83.42W, 25 octubre 1981, Pedro P. Moreno 12462 (MO).
Nicaragua Zelaya: 300 m, 13.34N 85.10W, 14 septiembre 1982, Pedro P. Moreno 17305 (MO).
Nicaragua Zelaya: 300-400 m, 13.46N 84.42W, 26 febrero 1983, Pedro P. Moreno y W. Robleto 20880 (MO).
Nicaragua Zelaya: 150-160 m, 11.31N 84.04W, 13 noviembre 1981, Pedro P. Moreno & J.C. Sandino 13030 (MO).
Nicaragua Zelaya: 80-100 m, 13.03N 84.58W, 2-4 mayo 1984, Pedro P. Moreno 24054 (MO).
Nicaragua Zelaya: 120 m, 11.53N 84.21W, Sept. 6, 1983, Micheal Nee 27814 (MO).
Nicaragua Zelaya: La Luz, 200 m, 13.44N 84.47W, 10 enero 1984, F. Ortiz 1584B (MO).
Nicaragua Zelaya: 50-100 m, 13.58N 84.12W, 30 Apr. 1978, W.D. Stevens 8501 (BM, MO).
Nicaragua Zelaya: 200-400 m, 13.44N 84.57W 13.45N 84.58W, 13 March 1978, W.D. Stevens 7067 (BM, MO).
Nicaragua Zelaya: 180-200 m, 11.40N 84.26W, 11-12 February 1978, W.D. Stevens 6363 (BM, MO).
Nicaragua Zelaya: 11.31N 84.45W, 27 Febrero 1994, Ricardo Rueda, Blas Hernández e Indiana Coronado 3620 (MO).
Nicaragua Zelaya: 5 m, 14.06N 83.33W, 21 Apr. 1978, W.D. Stevens 7904 .
Nicaragua Zelaya: 140 m, 14.01N 84.34W, 24 Apr. 1978, W.D. Stevens 8028 .
Nicaragua Zelaya: 13.48N 084.58W, 13 Noviembre 1995, Ricardo Rueda, Alfredo Grijalva, Rolando Dolmus y Milton Castrillo 3802 (MO).
Nicaragua Zelaya: 600 - 780 m, 14.06N 084.32W, 1 Junio 1997, Ricardo Rueda & Indiana Coronado 6418 (MO).
Nicaragua Zelaya: 750-850 m, 13.45N 85.00W 13.45N 85.01W, 10-11 March 1978, W.D. Stevens 6882 (MO).
Nicaragua Zelaya: 60-150 m, 13.58N 84.28W, 22 February 1979, W.D. Stevens 12603 (MO).
Nicaragua Zelaya: 150 - 200 m, 13.48N 084.26W, 12 julio 1997, Ricardo Rueda & Indiana Coronado 6844 (MO).
Panama Bocas del Toro: 300 m, 8.50N 82.15W, 4 March 1986, Gordon McPherson 8523 (MO).
Panama Canal Area: >300 ft.,, 5 March 1976, Thomas B. Croat 32981 (MO).
Panama CoclŽ: 130-250 m, 8.46.44N 80.31.54W, 7 Feb 1983, G. Davidse & C.W. Hamilton 23708 (MO).
Panama Darien: Río Cocalito,, 17 Feb. 1982, Whitefoord & Eddy 221 (BM).
Panama Darien: Darien National Park, 300-500 m, 7.58N 78.23W, 24 May 1991, Gordon McPherson 15364 (MO).
Panama Darien: 650-800 m, 07.45N 77.40W, 21 August 1987, Gordon McPherson 11522 (MO).
Panama Darien: Parque Nacional del Darién, 850 m, 8.03.30N 77.17.00W, 16 Oct. 1987, Greg de Nevers, H. Cuadros, B. Hammel & H. Herrera 8378 (MO). Panama Darien: 450 m, 8.02N 77.24W, 13 Oct 1987, B. Hammel G. de Nevers, H. Cuadros & H. Herrera 16184 (MO).
Panama Panamá: 200-250 m, 9.15-16N 78.59W, 1 Apr. 1988, Thompson 4705 (MO).
Panama San Blas: 0 m, 9.24N 79.24W, 16 Feb. 1986, Greg de Nevers, H. Herrera & S. Charnley 7192 (MO).