720 Annals of the Missouri Botanical Garden larly somewhat rounded, margins often irregularly & Croat 906 (DUKE), Croat 15173 (MO), Croat 5819 turned upward. INFRUCTESCENCE with spathe to (MO), Croat 6308 (MO), Croat 6502 (MO, PMA), Croat 4576 (MO), Killip 39979 (US), Kenoyer 188 (US); 12 mi. 23.5 cm long, usually orange; spadix, 9-12 cm S of Col6n on Rio Providencia, Tyson &: Blurn 3998 long, ca. 3 cm wide, berries orange to red or orange- (PMA); Frijoles vic., Pittier 3754 (US), Bailey 335 (F); red, drying pale yellow-brown, ellipsoid, T-8 mm Gatun Lake, Standley 41107 (US), Standley 40960 (US), long, 6 mm diam. (the stigmatic area ca. 2 mm AIaxon et al. 6812 (US), Maxon et al. 6820 (US), Standley 31266 (US); Rio Paraiso, above East Paraiso, Standley wide); seeds drying dark brown, 6 mm long, 5 mm 29867 (US). Colon: Rio Guanche, ca. 5 km upstream diam., to 3 mm thick, moderately smooth, caved from rd. to Portobelo, Harernel &: Trainer 14767 (MO). outward on funicular side. Darien: PN Cerro Pirre, vic. Rio Perisenico, Croat &: Zhu 77115 (INB, MO); 112 mi. E of Bayano Dam Bridge, vic. Distril)utio71 (ln(l habitat. Dieffienbachia isthmia Cangl6n, Antonio 4546 (MO, PMA); trail from Cana to ranges from Panallla to Colombia (Antioquia and Colombian border alollg Rio Setgandi, Gentry et al. 28574 Choco). The spee ies is highly variable ecologically, (COL, MO); E1 Real-l'inogana, Duke 5014 (MO); 3 mi. N occurring )rin( i)ally in Tropical moist J7orest (T-mf) of Santa Fe, Tyson et (ll. 4631 (SCZ), 4632 (MO, SCZ); 2 mi. E of Santa Fe, Tyson et al. 4834 (STRI); PN del Daand drier parts of Premontane wet J7orest (P-wf) life rien, between Rio Tol)alisa 8 Rio Pucuro, ca. 17 km E of zones at 50-8()()(1 ()()()) m elevation, but also in Pre- Pucuro, La Laguna alecl, Harernel et al. 16262 (CAS, COL, montane moist /or()st (P-mf), Premontane wet forest MO, PMA); airstrip at Cana gold mine area, Croat 38010 (P-wf), and Tro/)ie (ll wet forest (T-wf) life zones (MO), 38057 (MO); S of E1 Real, Alturas de Nique, near Cana mine, rd. to Boen de Cupe, McPherson 11591 (MO); (Holdri(lge, 1967) in Colombia. In Panama, the Cana region, ca. 1.5 klrs from Cana trail to Boca de Cupe, species ranges fX om Veraguas Province to the McPherson 15037 (M()). Herrera: NZZ of Las Minas, near Azuero Peninsultl ill the west (700-900 m in Her- Chepo, on Montosa (Je Chepo, McPherson 10958 (MO); rera an(l I os Salltos I'rovinces). Dist. Las Minas, Ch(\|o, loma E1 Montuoso, Galdarnes et al. 1626 Phenology. It'lowering for D. isthmia oecurs in (MO, PMA, US); Las Minas, base of E1 Higo, Galdarnes et al. 248f) (I'MA, US). Los Santos: Loma Priethe early rainy se.lsion from May to September (rare- ta, Cerro Grande, I(l(i.s et al. 2195 (COL, DUKE, MO, ly in Novellll) l )^ with fruits maturing during the UC). Panama: Disll ilo (:hepo, Puerto Coquira, Zarnbrano dry season arl(} etltly rainy season of the following & Delgado 1336 (PM \); San Jose Island, I. Johnston 1165 year, mostly ill Al)lil and May, but with many col- (GH); vic. Bayano llk( dam near Canita, Gentry & Tyson 1653 (MO, PMA); (Jllilllcin Lewis et al. 3251 (MO); 3.8 lections ma(le i ll I ru i t from August to Oe tol)er. mi. E of Rio Ipeti, louel slopes of Serrania de Maje, HuJ2t Discus.siosl. '1'11e species is characterize(l by its & Jacobs 1997 (M()); Itfo Majo-Quebrada Brava, ca. 2 mi. moderately small (usually less than 1 m tall and upstream from watell'tllls near edge of Bayano Lake, Croat with stems usually less less than 2.5 cm diam.) 34745 (MO); Isla 13tlstlno, Garibaldi 68 (MO); near Chihabit and frequently subcordate blackish-drying man, ca. 2 mi. up lwlo La Maestra, Kennedy 1193 (F). Veraguas: near plol)osed route of rd. from E1 Cortezo to blades which often have a white streak on the distil Arenas, Harernel 5.X72] (MO); Azuero Peninsula, trail behalf of the flattened (not flat-raised) midrib. In Pan- tween Jobero and lleadwaters of Rio Pedregal, Croat ama, it is probal)ly most easily confused with D. 34475 (COL, F, M(), I'MA); 18 km NZZ of Las Minas, Cerro killipii, which differs in having proportionately nar- Alto Higo, Harernel 12(98 (MO); "Los Girasoles," Escuela Agricola Alto Piedltl ( a. 5 km NW of Santa Fe, Dressler rower (typically only to 16 cm), usually subcordate 4716 (DUKE, F, M(), I'MA); 18 km W of Las Minas, Cerro greenish-drying blades with the uppel midrib Alto Higo, Harernel jU98 (MO); Cerro Delgadito just NW weakly flat-raised rather than merely flattened of Cerro Tute, S of Fiarlta Fe, Luteyn 4043 (DUIkE); Dist. above. Montijo, Isla Coiba, (erro de La Torre, Galdarnes et al. 2286 Though its range does not overlap with D. isth- (MO); Isla Coila, Rio Escondido vic., Galdarnes et al. 2252 (MO). COI ()MBIA. Antioquia: Mutata, Bajiramia, D. oerstedii may be confused with this species. Nuevo Oriente RoafJ, Brand & Ascanio 277 (COL). Cho- The latter, ranging from Mexico to central Panama, co: Riosucio, PN Natural Los Catios, Campamento de Tildiffers in having a usually sharply sulcate petiole upo, Forero et al. 1723 (COL, MO). and blades that dry greenish to yellowish green rather than blackened as is usually the case in D. 15. Dieffenbachia killipii Croat, sp. nov. TYPE: . I - IsthUmla. Panama. Cocle: vic. of E1 Valle de Anton, La Etymolog;y. The species epithet ;;isthmia" re- Mesa, forested flat area near Finca Macarenita, fers to its dominance in the area of the Isthmus of 8°36'N, 80°0T'M1, 800 m, 6 July 1994, YS B. Panama. Croat & G. Zhu 76666 (holotype, MO- 04612287!, isotypes, AAU!, B!, CAS!, COL!, Paratypes. PANAMA. Canal Area: Barro Colorado Island, Aviles 24 (MO), Shattuck 397 (MO); Lutz Trail, CR!, DUKE!, F!, GH!, HUA!, INB!, K!, M!, Croat 5378 (F, MO, RSA, SCZ, STRI), Croat 10133 (MO), MEXU!, NY!, PMA!, SCZ!, US!, VEN!, WU!). Croat 5317 (MO), Croat 5896 (MO), Croat 7712 (MO), Figure 15, 28B. Croat 11291 (F, NY, SCZ), Croat 5183 (MO), Croat 10982 (MO, SCZ), Croat 5709 (MO), Foster 865 (DUKE), Luteyn Planta terrestris, 40-100 cm.; internodia 1.5-5.5 cm
Volume 91, Number 4 2004 Croat Revision of Dieffenbachia Figure 15. Dieffenbachia killipii. A. Habit showing plant with quilted primary lateral veins (Croat 56902). B. Leaf blade adaxial surface (Croat 78247). C. Close-up of adaxial surface of blade (Croat 74759). D. Habit of flowering plant (Croat 76666). E, G. (Croat 75154). E. Close-up of stems. F. Habit of flowering plant (Croat 76666). G. Close-up of two inflorescences, one at anthesis. H. Close-up of pistillate and sterile staminate portions of spadix (Croat 76259). 721
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