1963] 



BOTAXY OF THE GUAYAXA HIGHLANDS PART V 



161 



dorsally). Probably Boyania will serve to emphasize the union of the New World 

 Bertolonieae with the Old World Sonerileae ; the intertribal hybrids of horticul- 

 tural literature have tainted the traditional division between the tribes, although 



1 have never seen such hybrids from accurately-named parents. None of the 

 5-merous Old World genera treated by Cogniaux and subsequent taxonomists 

 seems to have the floral character combination seen in Boyania of completely 

 superior ovary without hypanthial septs and subulate anthers with large dorsal 

 and ventral appendages. Although the fruit of Boyania is unknown, the general 

 generic relationship seems quite certain because of the habital and pubescence 

 similarities. Of the Tibouchineae, only Ernestia, with bilobed ventral connective 

 appendage, 3-4-celled ovary, and quite different pubescence, would at all conform 

 as a possible relative. Boyania commemorates the extensive field work performed 

 by Jonah and Rufas Boyan for the British Guiana Forestry Department and 

 The New York Botanical Garden through many years. Two of the three sheets 

 of Tillett et al. 45000 show nearly glabrous upper leaf surfaces, while all other 

 specimens (including the type number) have moderately pubescent upper blade 

 surfaces ; more collections are needed to evaluate this feature. 



Platycentrum clidemioides Naud. 



Leandra hylophila Gleason, Bull. Torrey Club 68: 24(3. 1941. 



There are no specific differences between the Putumayo and Trinidad collec- 

 tions of this species; the misleading "ovary 2/3-inferior " of Gleason 's original 

 description was actually a misprint of "ovary 2/5-inferior," as shown in the 

 original dissection notes. Examination of the Colombian specimens shows a nearly 

 superior ovary. The species has also been collected in Venezuela on the slopes of 

 Cerro de la Neblina at alt. 1000 m (Maguire, Wurdack, &' Bunting 37357). 



Leandra chimantensis Wurdack, sp. nov. 



L. procumbenti Ule affinis sed foliis proportionaliter vix angustioribus 

 ramorum et foliorum subtus pilis barbellatis inflorescentiis hypanthiisque 

 densiuscule glanduloso-setulosis. 



Rami teretes basim versus radicantes novelli petiolis inflorescentiisque modiee 

 vel dense setulosi pilis flexuosis remote barbellatis vetustiores glabrati. Petioli 

 4-7 mm ; lamina 2-5 X 1.2-2.5 cm elliptica apice late acuta vel anguste obtusa 

 basi rotundata rigida, supra primum in nervis primariis sparsissime barbellato- 

 setulosa mox glabrata, subtus in nervis primariis secundariisque primum sparse 

 barbellato-setulosa demum glabrata, 3-nervata (jugo exteriori inframarginali 

 tenui neglecto) nervis nervulisque supra anguste impressis subtus vix elevato- 

 reticulatis, apicem versus remote ciliolato-serrulata. Panicula 2-6 cm longa 

 oblonga pauciflora sparse setis i.s. nigris glanduliferis ca. 1 mm longis obsita ; 

 flores 4-meri plerumque 0.5-3 mm pedicellati; bracteolae 1 X 0.2-0.3 mm lanceo- 

 latae setulosae ad hypanthii basim insertae persistentes. Hypanthium (ad torum) 



2 mm longum sparse vel modice barbellato-setulosum et sparse glanduloso- 

 setulosum ; calycis tubus 0.1 mm longus, lobis interioribus 0.5 mm longis ovatis 

 apice obtusis sparse ciliolatis, dentibus exterioribus crassiusculis setuliferis 

 interiores aequantibus. Petala 3.5 X 1.4 mm oblongo-lanceolata apice acuta et 

 mucronulata glabra. Filamenta i.s. 2 mm longa glabra; antherarum thecae i.s. 

 2.2 mm longae oblongae minute porosae, connectivo non prolongato sed dorsaliter 

 ad basim per 0.5 mm crasse elevato. Stylus 5.5 X 0.3-0.2 mm ; stigma vix ex- 



