Anthurium radicosum Slandl. & Sleyerm., Publ. Field Mus. Nat. Hist., Bot. Ser. 23: 210. 1947. TYPE: Guatemala. Alia Verapaz: along Río Icbolay, 300-350 m, 6 March 1942, Steyermark 44776 (F, holotype).

LEAVES spreading; petioles ± terete, 1.8-13 cm long; blades lanceolate to elliptic, oblong-elliptic or oblanceolate, subcoriaceous, 5-21 cm long, 2.2-9.5 cm wide, acuminate at apex, acute to rounded at base, 5-21 cm long; the midrib raised above, flat to prom-inulous below; primary lateral veins 9-12 per side, departing midrib at 45°-55° angle, ± obscure above, usually obscure below; collective vein arising from the base, prominulous above, flat below, 4-6 mm from the margin.

INFLORESCENCE erect-spreading; peduncle 4.5-14 cm long, longer than petioles; spathe green, oblong-lanceolate, 3.7-5 cm long, 1-1.5 cm wide, acuminate at apex, acute at base; spadix green, becoming brownish-purple, 2.5-4 cm long; flowers 4-lobed, ca. 3 mm in both directions, the sides sigmoid; ca. 3 flowers visible in either spiral; pistils emergent, green, mammilliform; stamens held above tepals; anthers about as long as broad, less than 1 mm long; pollen pale yellow.

INFRUCTESCENCE spreading-pcndent; spadix to 12 cm long; berries red, broadly obovoid, ca. 7 mm long, flattened at apex with central depression. Figs. 86and 95.
The species is known from Guatemala to Panama, Ecuador, and surely will be found also on the Pacific slope of Colombia. In Costa Rica and Panama it is known from premontane wet, tropical wet, premontane rain, and lower montane rain forest at elevations from 150 to 1,000 m. In Costa Rica the species is known on the Atlantic slope from northwestern Alajuela to southeastern Cartago Province. In Panama it is known from both the Atlantic and Pacific slopes. Anthurium interruptum is in section Xialophyllium and can be recognized by its scandent stem with greatly, elongated internodes alternating with two or more successive abbreviated internodes giving the appearance of several leaves being clustered at a node. In addition, no other scandent, entire-leaved species is known to have bright red berries. Anthurium interruptum most resembles A. pittieri and A. carnosum. Steyermark, in Flora of Guatemala (Standley & Steyermark, 1958), combined A. radicosum and A. pittieri, apparently due to their vegetative resemblance. However, A. pittieri can be differentiated by the long-decurrent spathe and shorter internodes. They also differ in altitudinal and geographical distribution. Anthurium pittieri is known only from Costa Rica and Panama while A. interruptum ranges from Guatemala to Ecuador. The former species also has a range of 50 to 2,100 m altitude but mostly above 1,000 m. In Ecuador the species may range to about 1,300 m. Anthurium interruptum is most common in the lowlands between 100 and 1,000 m. Anthurium carnosum differs from A. interruptum in its nearly uniform internode length, thicker leaves and altitudinal range of 1,500 to 2,600 m.

Map of Mesoamerican specimens with coordinates

Belize Toledo:, 4 May 1948, Gentle 6524 (LL).
Belize Toledo:, 28 Apr 1951, Gentle 7309 (LL).
Belize Toledo: 700-750 m, 16.23N 89.09W, 5 April 1992, Bruce K. Holst 4024 (MO).
Belize Toledo: 700 - 730 m, 16.23.17N 089.05.30W, 14 February 1997, Thomas Hawkins 1408 (CAS, CM, MEXU, MO).
Belize Toledo: 420 m, 16.28.25N 088.59.43W, 21 May 1997, Gerrit Davidse & D.L. Holland 36649 (BRH, MO, NY).
Belize Toledo: 450 m, 16.27.48N 088.58.42W, 29 May 1997, Gerrit Davidse & H.B. Buchanan 36879 (MO).
Belize Toledo: 450 m, 16.27.54N 088.52.49W, 2 June 1997, Gerrit Davidse 36993 (B, MO, WU).
Costa Rica :, 1 Apr. 1986, Christenson 1292 (MO).
Costa Rica Alajuela: 900-1000 m, 10.12.40N 84.36.20W, 6 February 1991, Jens Bittner 616 (MO).
Costa Rica Alajuela: Reserva Biológica Monteverde, 820 m, 10.21N 84.40W, 15 June 1991, Bello & Haber 2887 (MO, CR).
Costa Rica Alajuela: 900 m, 10.18N 84.45W, 21 May 1987, William Haber & Erick Bello 7181 (MO).
Costa Rica Alajuela: 10.12.53N 84.36.28W, 2 mayo 1987, Gerardo Herrera Ch. 609 (MO).
Costa Rica Alajuela: 1100 m, 10.10.30N 84.30.00W, 26 Sept. 1987, Thomas B. Croat 68058 (MO).
Costa Rica Alajuela: 500-515 m, 10.15N 84.34W, 27 Sept. 1987, Thomas B. Croat 68170 (MO).
Costa Rica Alajuela: 700-900 m, 10.21N 84.41W, 20 August 1989, William Haber & Willow Zuchowski 9436 (MO).
Costa Rica Alajuela: 500 m, 10.55N 85.20W, 28 October 1987, Gerardo Herrera 954 (MO).
Costa Rica Alajuela: 900 m,, 11 agosto 1985, William A. Haber & E. Bello C. 2303 (MO).
Costa Rica Alajuela: 900 m, 10.18N 84.45W, 21 May 1987, William Haber & Erick Bello 7173 (MO).
Costa Rica Alajuela: 950 m, 10.19N 84.44W, 24 July 1987, William Haber & Erick Bello 7354 (CR, MO).
Costa Rica Alajuela: 1050 m, 10.18N 84.45W, 23 October 1987, William Haber & Erick Bello 7635 (MO).
Costa Rica Alajuela: 850 m, 10.18N 84.44W, 12 December 1987, William Haber & Erick Bello 7887 (MO).
Costa Rica Alajuela: 900 m, 10.18N 84.45W, 4 July 1988, Erick Bello 128 (MO).
Costa Rica Alajuela: W 800-1000 m, 10.11253"N 84.13628", 3 noviembre 1986, Gerardo Herrera Ch. & Victor Mora 189 (MO).
Costa Rica Alajuela: 850 m, 10.19N 84.43W, 5 September 1989, Erick Bello 1183 (MO).
Costa Rica Alajuela: 950-1000 m, 10.19N 84.4W, 7 December 1989, Erick Bello 1570 (MO).
Costa Rica Alajuela: 700-850 m, 10.19N 84.73W, 7 December 1989, Erick Bello 1587 (MO).
Costa Rica Alajuela: 900 m, 10.18N 84.45W, 25 June 1989, Erick Bello 970 (MO).
Costa Rica Alajuela: R. Tropical Obersdofr; Fila Volcán Muerto, 1500 m,, 20 May 1993, Erick Bello & G. Bello 5091 (CR, MO).
Costa Rica Cartago: Valle del Reventazón, 1110 m, 08.49.10N 84.27.30W, 29 June 1993, Priscila Campos 93 (CR).
Costa Rica Costa Rica:, , Brade 2055 (BR).
Costa Rica Guanacaste: 600 m, 10.48N 85.19W, 17 October 1987, Gerardo Herrera 897 (MO).
Costa Rica Guanacaste: 1400 m, 10.22N 84.52W, 30 JUL 1986, William A. Haber ex Eric Bello C. 5827A (MO).
Costa Rica Guanacaste: 1100 m, 10.23N 84.51W, 23 November 1987, William Haber & Erick Bello 7821 (MO).
Costa Rica Heredia: 230 m,, 30 May 1971, Proctor 32159 (LL).
Costa Rica Heredia: 700-800 m, 10.17.30N 84.04.30W, 3 April 1986, Michael H. Grayum 6704 (MO).
Costa Rica Heredia:, 2 Feb 1983, Garwood et al. 875 (BM).
Costa Rica Heredia:, 2 Feb 1983, Garwood et al. 876 (BM).
Costa Rica Heredia: 100 m,, 3 Feb 1983, Garwood et al. 966 (BM).
Costa Rica Heredia: La Selva,, , Folsom 9554A (TEX).
Costa Rica Lim—n: 20-170 m, 10.41N 83.38W, 15-20 Sep 1986, Warren Douglas Stevens 24599 (MO).
Costa Rica Lim—n: 5 m, 10.43N 83.40W, 25 Jan 1986, Warren Douglas Stevens 24021 (MO).
Costa Rica Lim—n: 10-40 m, 10.40N 83.40W, 12 March 1987, W.D. Stevens, G. Herrera & O.M. Montiel 24747 (MO).
Costa Rica Lim—n: 650 m, 9.23.30N 82.57.50W, 9 July 1989, Abelardo Chacón 146 (MO).
Costa Rica Lim—n: 600 m, 9.24.30N 82.58.10W, 6 July 1989, Abelardo Chacón 83 (MO).
Costa Rica Lim—n: 10-80 m, 10.40.30N 8.39.30W, 17-18 Sep 1986, Gerrit Davidse & Gerardo Herrera 31343 (MO).
Costa Rica Lim—n: 40 m, 10.25N 83.34W, 4 November 1987, Rafael Robles 1231 (MO).
Costa Rica Lim—n: 30 m, 10.22N 83.31W, 9 December 1988, Rafael Robles 2248 (MO).
Costa Rica Lim—n: P.N. Cordillera de Talamanca; Cordillera de Talamanca, 2250 m, 09.24N 83.11W, 1 April 1993, Alvaro Fernandez 978 (CR).
Costa Rica Lim—n: Cordillera de Talamanca, 1000 m, 09.47.00N 83.20.30W, 10 Aug 1995, Grayum 10846 (CR, INB, MO).
Costa Rica Puntarenas: 200 m, 08.42N 83.34W, 8 Oct 1984, M. Grayum 4075 (MO).
Costa Rica San José: 1100-1200 m, 10.04N 83.58W, 23 Jan 1983, G. Davidse et al. 23201 (MO).
Guatemala Alta Verapaz:, 15 May 1964, Contreras 4693 (LL).
Guatemala Alta Verapaz:, 15 Apr. 1964, Contreras 4314 (LL).
Guatemala Peten:, 19 Aug. 1976, Lundell & Contreras 20223 (LL).
Nicaragua Jinotega: 930 m, 13.35N 85.39W, 13 Jul. 1980, Sandino, J. C. 142-a (MO).
Nicaragua Matagalpa: 180-200 m, 12.03N 85.13W, 14 May 1980, Araquistain, M. & Moreno, P. 2373 (MO).
Nicaragua Matagalpa: 180-200 m, 12.03N 85.13W, 14 May 1980, Araquistain, M. & Moreno, P. 2396 (MO).
Nicaragua Río San Juan: 50-200 m, 10.45N 84.01W, 10 Julio 1994, Ricardo Rueda, Blas Hernández y Edith Palma 1905 (MO).
Nicaragua Río San Juan: 120 m, 11.01N 084.14W, 3 Enero 1997, Ricardo Rueda, Indiana Coronado, Oscar Aráuz & Franklin Flores 5299 (MO).
Nicaragua Zelaya: Cerro La Pimienta, 800-1000 m, 13.44N 59.45W, 16 Apr 1979, Grijalva, A. 403 (MO).
Nicaragua Zelaya: 750 m, 13.46N 84.59W, 10 Apr. 1979, Pipoly, J. 5073 (MO).
Nicaragua Zelaya: Kururia, 50 m, 14.41N 84.04W, 03 Mar. 1979, Pipoly, J. 3976 (MO).
Nicaragua Zelaya: 10 m, 11.33N 83.48W, 4 febrero 1982, P.P. Moreno & J.C. Sandino 14749 (MO).
Nicaragua Zelaya: 180-200 m, 11.40N 84.26W, 11-12 February 1978, W.D. Stevens 6311 (MO).
Nicaragua Zelaya: 100-200 m, 13.36N 85.05W, 18 March 1978, W.D. Stevens 7521 (MO).
Nicaragua Zelaya: 200 - 350 m, 13.48N 084.24W, 10 julio 1997, Ricardo Rueda & Indiana Coronado 6658 (MO).
Panama Bocas del Toro: 600 m, 8.47N 82.12W, 12 Mar. 1985, Hampshire & Whitefoord 488 (BM).
Panama Bocas del Toro: 310 m, 8.45N 82.10W, 9 March 1985, T.B. Croat & M.H. Grayum 60132 (MO).
Panama Bocas del Toro: 700 m, 8.45N 82.15W, 10 March 1985, T.B. Croat & M.H. Grayum 60244 (MO).
Panama Bocas del Toro: 820 m, 8.45N 82.16W, 12 March 1985, T.B. Croat & M.H. Grayum 60381 (MO).
Panama Bocas del Toro: 910 m, 8.44N 82.17W, 12 March 1985, T.B. Croat & M.H. Grayum 60409 (MO).
Panama Bocas del Toro: 900-950 m, 8.48N 82.15W, 8 March 1986, Gordon McPherson 8695 (MO).
Panama Chiriquí:, 16 Feb 1981, Gordon & Him 54 (MO).
Panama Chiriquí: 1050 m, 8.45N 82.15W, 9 March 1986, Gordon McPherson 8739 (MO).
Panama Chiriquí: 1200 m, 8.42N 82.14W, 16 June 1984, H.W. Churchill 5465 (MO).
Panama Panamá: 700-750 m, 9.15N 79.25W, 19 June 1988, Thomas B. Croat 68658 (MO).
Panama Veraguas: 300 m, 8.33N 81.08W, 28 June 1987, Thomas B. Croat 66951 (MO).

Map of South American Specimens with coordinates

Colombia Antioquia: Las Orquideas, 1300-1500 m, 06.31N 76.19W, 2 Apr 1992, Alvarez & Alvarez 3226 (MO).
Colombia Antioquia: Parque Nacional Natural "Las Orquideas", 1300-1500 m, 06.31N 076.19W, 2 Abril 1992, cardenas 3226 (MO, JAUM).
Colombia Caqueta: Río Caguán,, 24 Apr 1953, R. Romero-Castaneda 4093 (COL).
Colombia Choco: 05.35N 076.57W, 23 Apr. 1979, Forero et al. 5696 (COL).
Colombia Narino: 940 m, 1.21N 78.06W, 27 Feb. 1992, Thomas B. Croat 72453 (COL, MO, VEN).
Colombia Narino: Reserva Natural Río Nambi, 1325 m, 01.18N 078.08W, 1 Dec. 1993, Franco, P. et al. 4712 (COL).
Colombia Narino: Reserva Natural Río Nambi, 1325 m, 01.18N 078.08W, 7 Dec. 1993, Franco, P. et al. 5007 (COL).
Colombia Narino: Reserva Natural Río Nambi, 1325 m, 01.18N 078.08W, 7 Dec. 1993, Franco, P. et al. 5033 (COL).
Ecuador :, , sodiro 11953 .
Ecuador Esmeraldas: Cotacachi-Cayapas, 200 m, 00.43N 78.53W, 20 Sep 1993 - 31 Sep 1993, Milton Tirado & E. Albuja, M. Chapiro 433 (MO, QCNE).
Ecuador Esmeraldas: Bilsa, 400-600 m, 0.21N 79.44W, 18 Sep 1994, John L. Clark & B. Adnepos 79 (MO, QCNE).
Ecuador Esmeraldas: 400-600 m, 00.21N 79.44W, October 2, 1994, Margot S. Bass & Nigel Pitman 127 (QCNE, K, MO, NY).
Ecuador Esmeraldas: Bilsa, 500 m, 00.21N 79.44W, 22 Oct 1996, John L. Clark 3084 (MO,QCNE).
Ecuador Esmeraldas: Bilsa, 500 m, 00.21N 79.44W, 5 Jan 1997, John L. Clark, E. Austen, S. Bennett & D. Kapan 3725 (MO, QCNE).
Ecuador Esmeraldas: Bilsa, 500 m, 00.21N 79.44W, 5 Jan 1997, John L. Clark, E. Austen, S. Bennett & D. Kapan 3726 (MO, QCNE).
Ecuador Esmeraldas: Bilsa, 500 m, 00.21N 79.44W, 16 Jan 1997, John L. Clark, L. Chatron, C. Repetur & P. Maas 3813 (MO, QCNE).
Ecuador Esmeraldas: 685 m, 00.52.04N 078.29.03W, 30 June 1998, Thomas B. Croat, Richard Mansell, Lynn Hannon & Jane Whitehill 82174 (MO).
Ecuador Guayas: 300 m, 02.25S 79.39W, 3 May 1996, X. Cornejo, C. Bonifaz 5082 (GUAY, MO ).
Ecuador Guayas: 150-200 m,, 27 Julio 1994, X. Cornejo, C. Bonifaz 3060 (GUAY, MO, QCNE ).
Ecuador Guayas: 50-100 m,, 25 May 1980, G.Harling & L. Andersson 19436 (MO, GB).
Ecuador Imbabura: Río Mira valley, 750-775 m,, 8 September 1976, Thomas B. Croat 38984 (MO).
Ecuador Imbabura: Lita, 600 m,, October 1980, Laura Cobb 18 (MO).
Ecuador Los Ríos: La Centinella, 450-475 m, 00.33S 079.22W, 13 October 1980, Thomas B. Croat 50662 (MO).
Ecuador Los Ríos: Hacienda Clementina, 20 m,, 18 January 1967, Benkt Sparre 14489 (S).
Ecuador Manabi: Estero Perro Muerto, 400-420 m, 01.36S 80.42W, 23 Jan 1991, A. Gentry & C. Josse 72686 (MO).
Ecuador Pichincha: 750 m, 0.05N 79.02W, 15 Jul 1986, Thomas B. Croat & Jimena Rodríguez B. 61458 (CM,G,K,MO,QCA).
Ecuador Pichincha: La Centinela, 1000 m, 0.32S 79.11W, 14 Mar 1992, Thomas B. Croat 73022 (MO).
Ecuador Pichincha: Bosque muy humedo, 1600-1800 m, 00.16S 078.44W, 15 June 1990, G.Benavides 118 (MO, Q).
Ecuador Pichincha: Between Quito and Santo Domingo de los Colorados, 1270 m,, 2 September 1976, Thomas B. Croat 38768 (MO).
Ecuador Pichincha: Alluriquin-Chiriboga Road, 1200-1400 m,, 20 April 1977, M.T.Madison 4062 (MO, NY).
Ecuador Pichincha: 1630-1730 m, 00.21S 078.50W, 12 October 1980, Thomas B. Croat 50632 (MO).
Ecuador Pichincha: 850 m,, 9 September 1967, Benkt Sparre 18448 (S).
Peru Amazonas: Río Cenepa, Bosque Primario, 700 m, 04.25S 78.16W, 17 Agosto 1994, R. Vasquez, N. Jaramillo, R. Apanu, M. Ugkuch 18886 (CM, MO). Peru Huanuco: Dtto. Hermilio Valdizan, 1600 m,, , Schunke 11397 (IBE).
Peru Madre de Dios: Río Palotoa, 700-1000 m, 12.35S 71.18W, , Foster et al. 10911 (F).
Peru Pasco: Río Alto Iscozacin, 400-500 m, 10.19S 75.16W, , Foster & d'Achille 10107 (F).
Peru Ucayali: 260 m, 08.02S 73.55W, 19 June 1987, Al Gentry & Camilo Diaz 58438 (MO, USM).
Venezuela Amazonas: 80 m, 1.05N 66.25W, 29 June 1984, Gerrit Davidse & James S. Miller 26826 (MO, NY).