1963] 



BOTANY OF THE GUAYANA HIGHLANDS PART V 



217 



mm longis apice acumine lanceolato acuminate plerumque 1-1.2 mm longo ; stylo 

 28 mm longo parte superiore 18 mm pilosula infra glabra, stigmatibus crassis 

 lineari-oblongis 8 mm longis; flores femineis non visis; bacca non visa. 



BRAZIL. Amazonas : Sao Paulo de Olivenca ; silva non inundabili ; arbor sat 

 magna; floribus albis demum luteseentibus, odoratis; 5 April 1944, A. Ducke 1557 

 (holotype US, isotypes F, NY). 



This species was originally determined by Dr. Ducke as K. semisericea Ducke, 

 but differs from that species in the shorter corolla-tube of the staminate flower 

 with the glabrous outer surface of the tube occupying a much smaller proportion 

 of the tube than in K. semisericea. The new taxon appears more closely related 

 to K. neblinensis Steyerm., from which it differs in the relatively longer corolla- 

 lobes in proportion to the corolla-tube of the staminate flowers, the longer calyx- 

 tube of the staminate flowers, and the larger leaf-blades with more numerous pairs 

 (10-13) of lateral nerves. 



6. Kotchubaea montana Steyermark, sp. nov. 



Arbor dioica 8-metralis, ramulis annotinis juvenilibusque puberulentibus 

 subhirtellisque ; stipulis persistentibus late triangularibus apice rotundatis vel 

 obtusis 3-5 mm longis extus strigillosis ciliolatis ; f oliis petiolatis, petiolis 8-10 

 mm longis supra concavis longitudine sulcatis minutissime puberulis ; laminis 

 firme membranaceis elliptico-obovatis apice plerumque abrupte acuminatis basi 

 cuneatim angustatis 9.5-14.5 cm longis 3.5-7 cm latis subtus per omnes partes 

 puberulis, nervis lateralibus utroque latere 7-8 adscendentibus non anastomosin 

 facientibus nervulis subtus obsoletis ; floribus masculis in cymis corymbosis 

 irregulariter 7-floris eompositis, pedicellis 15-25 mm longis glabris ; calyce 

 masculo campamilato-tiibuloso 10-13 mm longo 6-8 mm lato extus glabro intus 

 toto dense cano-sericeo apice irregulariter repando-denticulato dentibus late 

 deltoideis obtusis plerumque 0.2-0.5 mm longis; corolla mascula flava (teste 

 King) hypocrateriformi tubo 43-45 mm longo 4-5 mm lato superne ampliato 

 fauee 7 mm longa 9 mm lata tubo extus inferne leviter breviterque cano-sericeo 

 parte basilari extrema glabra 7 mm excepta intus glabro, fauce extus densius 

 cano-sericea intus dense sericea, lobis 8 lineari-lanceolatis subfalcato-attenuatis 

 apice obtusis vel subacutis 36—41 mm longis 3.5-5 mm latis utrinque breviter 

 canotomentellis ; staminibus 8, antheris lineari-oblongis 5.5 mm longis apice 

 acumine lanceolato acuminato 0.2-0.5 mm longo basi obtuse subsagittatis ; floribus 

 femineis non visis ; bacca non visa. 



PERU. Dept. San Martin: Zepelacio, near Moyobamba ; mountain forest; 

 alt. 1200-1600 m ; Dec 1933, G. King 3452 (holotype NY). 



This species is easily distinguished by the combination of puberulent to 

 subhirtellous flowering branches, the puberulous lower surface of the leaf-blades, 

 and corolla-lobes nearly as long as the corolla-tube in the staminate flowers. It 

 ascends to a higher altitude than any of the other known species of the genus. 



From K. sericantha Standi., with which it was mistaken by Standley, it is at 

 once separated by the corolla-lobes of the staminate flower nearly equaling the 

 corolla-tube, the more sparsely pubescent outer surface of the shorter corolla-tube, 

 the glabrous outer surface of the calyx-tube, the smaller leaf-blades lacking a 

 reticulate tertiary venation, the conspicuous indument on the lower surface of the 

 leaf-blades, and apparent lack of resinous exudate on the branches or foliage. 



