Description originale : Heteropsis steyermarkii Bunt., sp. nov. (
Fig. 16)
Herba usque 7 m scandens. Caules multum ramosi, lignei tenacissimi 0.35-0.6 cm crassi virides postremo brunnescentes scabrelli internodiis 0.3-3 cm longis, gemmis lateralibus longe exsertis (0.3-0.4 cm). Petiolus 3-6.7 cm longus, basi geniculi tenus vel ultra vaginatus alis stantibus attamen marginibus involutis denique siccantibus brunnescentibus persistentibus; geniculum 0.5-1.7 cm longum. Foliorum lamina pergamena vel subcoriacea autem fragilis oblongo-elliptica vel elliptica aut latissima paulo supra vel infra medium, interdum subfalcata 16-36 cm longa 4.6-10 cm lata, ad basim truncata vel rotundata, ad apicem acuta vel fere obtusa apice ipso acuminata, paululum corrugata, adaxiale impolita nitescens, nervis lateralibus numerosis subaequalibus 0.3-0.4 cm inter se distantibus sub angulo 55-75°(-82°) oreuntibus marginem versus valde arcuatis, abaxiale grisea vel veneto-grisea vel argentea costa luteola; folia nova aenea abaxiale pruinosa. Inflorescentia solitaria terminalis (in ramo patenti vel pendulo 4-10 cm longo) erecta. Pedunculus 1.2-2.2 cm longus ad basim 1-2 bracteis sub anthesi viridibus deinde lutescentibus et caducis. Spatha fusiformi-inflata (acumine 0.2 cm longo incluso) 4.5-7 cm longa ca. 2.2 cm diam. (in positione naturali) 6 cm lata (ubi complanata) marginibus laxantibis vel paulo discedentibus tamen non aperiens, mox caduca, extra viridis vel ex luteo viridis, intra cremicolor. Spadix spipitatus stipite 1.0-1.4 cm longo, ambas extremitates versus angustatus 2.5-3.5 cm longus ad 0.8 cm diam., sub anthesi pallide viridis. Flores apice convexi. Infructescentia matura ad 4.7 cm vel ultra longa 1.5 cm crassa aurantiaca. Baccae ad 0.4 cm longae 0.3-0.7 cm crassae; semina 4-5 apostrophiformia brunnea perpallida foveolata, 0.35-0.38 cm longa 0.2-0.27 cm lata.
TYPUS: Julian A. Steyermark & George S. Bunting 102607. Climber to 7 m up tree trunk with spreading and pendent branches to 6 mm diam., woody, green becoming brownish in age; lf. blade pergameneous-subcoriaceous, brittle, adax. glossy dark green, slightly corrugated by concavities along nerves, abaxially prominently light gray, rib green-yellow; spathe fusiform-inflated, to 7 cm long, 2.2 cm across, slightly parting but not opening, yellow-pale green outside, inside creamy, early deciduous; spadix 4 x 0.8 cm, light green in anthesis; mature infructescence 1.1 cm diam. A lo largo del río Yatua, margen izquierda, bajando desde el Cerro Arauicaua, 1°35' N. , 66°10' O., Depto. Río Negro, Territorio Federal Amazonas, 125 m, 11-12 de abril, 1970 [Holotypus: VEN].
PARATYPUS: Julian A. Steyermark & George S. Bunting 103056. Leaves silvery below, dark green above; spadix 3.5 x 1.4 cm, pale gray, apices of individual fruits slightly convex, ca. 4 mm diam. Cerro Yapacana, selva alta en la parte suroeste, desde el Campamento Base hasta las faldas pedregosas, 3°45' N., 66°45' O., Depto. Atabapo, Territorio Federal Amazonas, 125-400 m, 3 de mayo, 1970 [VEN].
Type : Venezuela, T.F. Amazonas, Depto. Río Negro, a lo largo del río Yatua,
margen izquierda, bajando desde el Cerro Arauicaua, 01°35' N 66°10' W, 125 m, 11-12/04/1970, fleurs et fruits. Climber to 7
m up tree trunk with spreading and pendent branches to 6 mm diam.,
woody, green becoming brownish in age; lf. blade
pergameneous-subcoriaceous, brittle, adax. glossy dark green, slightly
corrugated by concavities along nerves, abaxially prominently light
gray, rib green-yellow; spathe fusiform-inflated, to 7 cm long, 2.2 cm
across, slightly parting but not opening, yellow-pale green outside,
inside creamy, early deciduous; spadix 4 x 0.8 cm, light green in
anthesis; mature infructescence 1.1 cm diam. J.A. Steyermark & G.S. Bunting 102607 (HT:
VEN90974; IT:
F0044972F, G,
K000524005 [sur
Global plants],
MO,
P02137250, U).
Venezuela, T.F. Amazonas, Depto. Atabapo, Cerro Yapacana, selva alta en la parte suroeste, desde el
Campamento Base hasta las faldas pedregosas, 3°45' N 66°45' W,
125-400 m, 03/05/1970, fruits. Leaves silvery below, dark green above; spadix
3.5 x 1.4 cm, pale gray, apices of individual fruits slightly convex,
ca. 4 mm diam. J.A. Steyermark &
G.S. Bunting 103056 (PT:
VEN285432).
