l - CNCFlora

718 Annals of the
Missouri Botanical Garden
between D. horichii (Grayum 4756) and D. oerstedii sheath 8.5-21 cm long (averaging 14 cm), with
(Grayum 4765). It differs in having petioles that are margins drying thin, light brown and minutely unnarrower
and less fully sheathed.
dulate, the tip inequilaterally acute to emarginate
Etymology. The species is named in honor of and free-ending; unsheathed portion flattened or
horticulturist Clarence Horich, who made the first rounded and becoming weakly sulcate toward apex
collection of the species.
in cross section (never sharply sulcate), blunt to
Paratypes. COSTA RICA. Puntarenas: San Jose
Province, Playa Dominical-San Isidro del General Baru,
'rinamastes, Burger et al. 10669 (F, MO), Burger & Baker
10137 (CR, F), along Quebrada Bonita, Carara Res., Grayum
et al. 5723 (INB, MO), Finca E1 Eden, km 183, R.
2, ca. 400 m E of Santa Marta, L. G6mez 22951 (B, CM,
CR, MO); Quebrada Bonita, Carara Res., Grayun 4756
(CR, MO), Croat 79073 (EAP, INB, MO, PMA), hills at
SW part of Montanas Jamaica, ca. 2.5 km NE of Bijagual
moderately acute, rarely broadly and bluntly sulcate;
blades oblong-ovate to narrowly ovate, (12)15-
30(39) cm long, (6)10-26 cm wide (averaging 26
x 16 cm), 0.78-1.77 times longer than petiole (averaging
1.1 times longer), inequilateral, one side
0.5-2.6 cm wider than the other side thinly coriaceous,
abruptly to gradually acuminate at apex,
acute to cordate at base, the sides often + unequal,
de Turrubares, Carara Res., Grayu1m et al. 5467 (MO). usually subcordate with at least one side subcor-
San Jose: Par. Nac. Braulio Carrillo, Quebrada Sanguijuela,
Chavarrfa & Untana 157 (CR, MO), Zona Prot. La
Cangreja, vic. Quebrada Grande, ca. 2 km NNE of Mastatal
de Puriscal, Grayun 8638 (CR, MO), ZP La Cangreja,
ca. 1.5 km E of Santa Rosa de Puriscal, Grayun et al.
8336 (CR, MO), San Jose rd. from Parrita to Santiago de
Purriscal, Barringer 1790B (CR), Res. Biol. Carara-Est.
Quebrada Bonita, Chac6n 1406 (CR), Cordillera Talamanca,
Rfo Hermoso, Finca E1 Quizarra, L. Willianes et al.
28479 (F, NY, US); Acosta, along Rfo Parritilla, ca. 1 km
date at base; upper surface matte to weakly glossy,
dark green, drying dark gray-green to sometimes
blackened; lower surface matte, paler, drying yellowish
gray-brown to dark yellow-brown; midrib 5-
8 mm diam., flat to broadly and obscurely sunken
at base, weakly raised toward apex above, concolorous
to slightly paler than surface, frequently
much paler than surface or even white toward apex,
E of Zoncuano, Grflyum el al. 11174 (INB, MO); Perez
Zeled6n, Fila Tinanlaste, Valverde 741 (CR, MO); Puriscal,
Fila Tufares, Salitrclles de Puriscal, Goncez-Laurito 7792
(CR); Z.P. La Cangreja, Cerros de Puriscal, San Martfn de
Puriscal, La Fila Vala Blanca, J. Morales 2035 ((21t, INB,
MO).
Cultivated specimens. Costa Rica. 800-900 z1, cultivated
at Munich as 1203/74, Horich s.n. (M).
often with a light green streak distally! drying paler
than surface or darker than surface al)ove, convex
to bluntly round-raised, drying somewhat flattened
with acute ribs below, drying darkel than surface
below; primary lateral veins 7 to 12(15) per side,
departing midrib at a 45°-55° angle (to 30°-50° at
apex, 50°-90° at base), arising a( utely, then
14. Dieffenbachia isthlnia Croat, sp. nov.
TYPE: Panama: along trail betw. Rfo Maje &
Quebrada Brava, 60 m, 4 May 1976, 1: B.
Croat 34656 (holotype, M0-240198!; isotypes,
B!, K!, PMA!, US!). Figures 14, 28A.
spreading weakly or not at all sunkell often greenish
toward apex, sometimes raise(l 1leal midrib, and
diminishing toward margins above; lllinor veins obscure
above, obscurely visible to not visible below.
INFLORESCENCES straight to sliglltly curved, 3
to 5 per axil, bracteoles 9-20 cm long; peduncle
Planta
2-3(4.5)
plerumque
cm diam.,
ad 1 m,
atroviridia;
internodia
petiolus
0.5-3
11-34(40)
cm longa,
cm lon-
(2.5)4-12.5 cm long, 6-10 mm diall., sometimes
flattened on one side in cross sec.ti(-)n, green; spathe
gus, vaginatus 0.4-0.77 longitudinis, vagina 8.5-21 cm 15-17.5(23) cm long, medium green outside, slightlonga,
lamina oblongo-ovata vel anguste ovata, (12)15-
30(39) cm longa, (6)10-26 cm lata, plerumque subcordata,
nervis primariis lateralibus 7-12(15) utroque, inflorescentia
3-5 per quoque axillam; pedunculus (2.5)4ly
paler green inside throughout, except the apical
portion white at anthesis, to 1.7 c m lollger than the
spadix, elongating somewhat after closing; spathe
12.5 cm longus, spatha 15-17.5(23) cm longa, spadix tube less than 2 cm diam. when furled, spathe
10.5-15.8 cm longus; pars feminea 6.5-9.5 cm longa, 1.4 blade 2.5-3 cm diam. at anthesis; s)