100 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



| VOL. 10 



0.1-0.2 mm bilobulato. Ovarium triloculare apice dense cum glandulis sessilibus 

 praeditum ; stylus glabor 7 X 0-3 mm ; stigma punctiforme ; capsula bilocularis, 

 seminibus 0.8 X 0.5 mm cochleatis densissime minuteque foveolatis. 



Type: shrub 0.3-2 m tall in large colonies at edge of savanna on right bank 

 of Rio Pacimoni 50 km above mouth, elev. 100-140 m, Terr. Amazonas, Vene- 

 zuela, Feb 7, 1954, Bassett Maguire, John J. Wurdack, & George S. Bunting 

 37601 (NY). 



Paratypes: shrub 1 m, buds pink, abundant in savanna on left bank of Carlo Hechimoni 

 8 km above mouth, Kio Siapa, Terr. Amazonas, Feb 9, 1954, Maguire, Wurdack, 4" Bunting 

 37668 ; bushy shrub ca. 6 dm tall in fruit, edge of clearing on east bank of Rio Casiquiare 300 

 meters below mouth of Rio Pacimoni, Terr. Amazonas, April 19, 1953,. Maguire # Wurdack 



35724. 



M. axillifiora represents the ultimate reduction in the genus, with its tiny 

 flowers and bilocular ovary. The vegetative analogy with M. stylosa (which 

 grows in the same area) is obvious. However, M. stylosa has somewhat larger 

 leaves, much larger long-pedicelled flowers in peduncled axillary cymes, sparsely 

 glandular-pubescent styles and filaments, and quadriloeular ovaries. The flower 

 size and bilocular ovary of M. axillifiora are very suggestive of Samdemania. 

 The two species of Sandemania are pubescent shrubs with terminal panicles, 

 rostrate anthers, and eglandular ovaries. None of the material of M. axillifiora 

 was in anthesis, the diagnosis being compiled from old flower remnants still 

 clinging to the fruiting specimens. 



Macairea neblinae Wurdack, sp. nov. 



M. rigidae Benth. affinis sed cum foliis anguste ovatis ramulorum sterilium 

 pubescentia fusco-rubra erecta ovario sieut capsula plerumque 4-loculari. 



Rami obtuse quadrangulares, juveniles densissime cum pilis patulis robnstis 

 glanduliferis i. s. fusco-rubris (demum fusco-brunneis) ca. 1 mm longis vestiti. 

 Petiolus 0.7-1.3 cm longus, pilis ramorum eisdem; lamina 3.5-6 X 2-3 . cm, 

 anguste ovata apice hebetiacuta basi obtusa 5-nervia (nervis extimis prope mar- 

 gines), supra dense tuberculato-strigosa tubereulis 1-2 /mm 2 cum seta glanduli- 

 fera armatis, subtus dense glanduloso-puberula et leviter venoso-foveolata. Pani- 

 cula terminalis peduneulis pedicellis bracteis hypanthio calycis lobisque modice 

 glanduloso-hirtellis pilis fusco-rubris ; pedicelli supra bracteolas 2-4 mm. Hypan- 

 thium 2.4 X 2.5-2.7 mm. ; calycis lobi 2.3-2.5 X 0.3 mm, subulati. Petala 6-6.5 

 X 3.5-4.0 mm, asymmetrice rhomboidea seta unica glandulifera armata extus 

 minute granulosa alioqui glabra. Stamina paulo inaequalia filamentis modice 

 (praecipue supra) glanduloso-puberulis. Stamina maiora : anthera 2.9-3.0 mm. 

 connectivo sub loculis 0.7-0.8 mm, appendice cordata 0.6-0.7 X 0.6-0.7 mm; 

 filamentum 4.7-5.7 mm. Stamina minora : anthera 2.4 mm, connectivo sub loculis 

 0.4 mm, appendice 0.5 X 0.5 mm; filamentum 3.5 mm. Ovarium 4-loculare, 

 apice dense glandulifero-setulosum pilis 0.3-0.4 mm longis ; stylus 5 X 0.2-0.35 

 mm, basim versus sparse glanduloso-setulosus ; capsula plerumque 4-locularis, 

 seminibus 0.6 X 0.4 mm cochleatis minute foveolatis. 



Type : shrub 1-2 m, fruiting, frequent on upper escarpment slopes east of 

 Camp 3, elev. 1700 m, Cerro de la Neblina, Rio Yatua, Terr. Amazonas, Vene- 

 zenla, Dec 27, 1953, Bassett Maguire, John J. Wurdack, & George S. Bunting 

 36935 (NY). 



Paratypes: same locality, Dec 24, 1953, 36849 ; open headland 8 km north of cumbre camp, 

 dev. 1900 m, Cerro .de la Neblina, Jan 10, ]954, 37198; along escarpment overlooking Cano 

 Grande below cumbre camp, elev. 1650 m, Cerro de la Neblina, Jan 10, 1954, 37212. 



