1961] 



BOTANY OF THE GUAYANA HIGHLANDS PART IV (2) 



33 



branacea (6-) 12-21 (acumine excluso) X (2.5-) 5.5-12 cm apice subabmpte 

 acuminata acumine 1-2 cm longo basi cuneata 5-plinervata nervis omnino supra 

 subplanis subtus graciliter elevatis nervis primariis per paria plerumque vix 

 inaequaliter insertis nervis secundariis plerumque 5-10 mm inter se distantibus 

 nervulis laxe reticulatis, ad margines integra vel inconspicue crenulata. Inflor- 

 escentia inconspicue furfuracea usque ad 10 cm alta cum ramis longis divaricatis 

 secundifloris ; bracteolis 0.3 mm longis ovatis caducis; flores 5-meri glabri 

 breviter (0.5 mm) pedicellati. Hypanthium (ad torum) 2.2-2.5 mm altum 

 anguste oblongum ; calycis tubus vix 0.1-0.2 mm altus, lobis interioribus 0.4^0.6 

 mm altis ovatis apice obtusis, dentibus exterioribus acutis non eminentibus. 

 Petala 1.8-2 X 1.1-1.2 mm obovata apice oblique retusa. Stamina isomorphica; 

 filamenta 3 mm longa ; antherarum thecae 3 mm longae curvatae subulatae, con- 

 nectivo postice exappendiculato vel inconspicue calcarato antice sub insertione 

 filamenti 0.4 mm prolongato appendice extremitate 0.1-0.15 mm hebeti-bilobulato. 

 Stylus 7.5 X 0.25 mm ; stigma truncatum 0.3 mm diam. ; ovarium 3-loculare vix 

 inferum glabrum apice 0.3 mm excavatum et indistincte trilobulatum ; bacca i.s. 

 valde 10-costata ca. 4 mm longa ; semina 0.4—0.5 mm longa tuberculata. 



VENEZUELA: Amazonas: Cerro de la Neblina, abundant in talus forest between Camps 

 3 and 4, alt. 1000-1200 m; shrub 2-5 m, flowers white, young fruit greenish; 9 Nov 1957, 

 Maguire, WurdacTc 4" Maguire 42015 (holotype, NY); talus forest of Cerro de la Neblina, 

 Maguire, WurdacTc <$■ Maguire 42004 (paratype) ; talus forest of Cerro Huachamacari, alt. 

 1100 m, Maguire, Cowan $ WurdacTc 29827 (paratype) ; slopes of Cano Negro, alt. 305-1095 

 m, Cerro Duida, Steycrmarlc 5797? (paratype). 



The closest relative of M. pseudocapsularis is an undescribed species from 

 the Gran Sabana and Tafelberg, having the paniculate inflorescence of M. lateri- 

 flora but the plinerved leaves and 5-merous flowers of the Terr. Amazonas 

 species. The fresh fruit of M. pseudocapsularis is a spherical translucent white 

 to pale orange berry with high water content ; the dried fruit simulates a cap- 

 sule to such an extent that Dr. Gleason, unable to determine the Steyermark 

 fruiting collection, noted that it might represent an undescribed genus of the 

 Bertolonieae. 



In updating Dr. Gleason 's manuscript of the Mela-stomataceae of Panama, I 

 introduced without comment the synonymization of M. disparilis (Standi.) 

 R. O. Williams under M. lateriflora; the basis for this synonymy has been the 

 examination of Baker 116 (MG 9368), from Marco, Para, Brazil. The species 

 is known from Central America to the Amazon Valley and has been recently 

 collected several times in Para; Froes 23810 (NY), from the Rio Solimoes, is an 

 exact duplicate of Baker's collection. 



Miconia yatuensis Wurdack, sp. now Fig. 32, A-E. 



M. lateriflorae Cogn. affinis, sed cum ramulis dense furfuraceo-puberulis et 

 foliis distincte 5-plinervatis. 



Frutex ad 1.5 m ; ramuli cum inflorescentiis petiolisque dense furfuracei- 

 pubescentes primum fusco-rufi demum fuscescentes. Folia aequalia vel sub- 

 disparilia; petioli 2-4 cm longi ; lamina chartacea nitidula (10-) 15-23 (acumine 

 excluso) X (4.5-) 6-9 cm elliptica apice per 1-1.5 cm subabrupte acuminata 

 basi vix cuneata ad margines (praecipue apicem versus) undulato-crenata den- 

 tibus cum cilio brevi caduco armatis triplinervata nervis lateralibus sub- 

 basilariter insertis sed usque ad 5-10 mm non divergentibus nervis secundariis 

 tertiariisque supra et subtus vix prominentibus tertiariis laxe reticulatis secun- 

 dariis ca. 1 cm inter se distantibus, subtus per venam medianam modice fur- 



