22 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [ VOL. 10 



Only further collections will prove whether the above is a distinct species or 

 only a variety of N. sul)petiolata. At present it can be said to differ by its nar- 

 rower leaf-blades and smaller, more highly connate sepals. 



Navia parvula var. expansa L. B. Smith, var. now Fig. 10. 



Canle elongato, pauciramoso; foliis ad 15 cm longis; floribus inflorescentiae 

 pluribus; sepalo anteriori verisimiliter omnino abortivo; petalis erectis, anguste 

 laneeolatis, 15 mm longis, aureis; staminibus longe exscrtis. 



VENEZUELA: Amazonas: Cerro de la Neblina, Rio Yatua, alt. 1200-1400 m, abundant 

 in colonies on dry rock ledges in Canon Grande east of Cumbre Camp, 26 Nov 1957, B. Ma- 

 guire, J. J. Wurdack $ C. K. Naguire 42246 (type). Number 42502 from dry cliff faces in 

 forest south-southwest of Cumbre Camp at alt. 1050-1100 m is the same variety, and 42536 

 from the same cliffs but higher and in a sheltered area is intermediate between the two 

 varieties. 



The type of the species is its smallest form and occurs at the highest altitude, 

 which indicates a correlation between shelter and size- of plant. The material 

 from this latest expedition provides good flowers which were lacking in the type, 

 and thereby discloses several unusual characters. The petals are narrow and 

 erect and the stamens long-exserted, but most remarkable is the absence of any 

 trace of an anterior sepal. Such a situation can be considered the final phase 

 in a reduction evolution which began by its being covered by the other sepals. 



ANNONACEAE 7 



Guatteria longedecurrens R. E. Fr., sp. nov. 



Arbor ca. 18 m alta ; ramuli novelli nigreseentes, pilis sparsis mox deciduis 

 instructi; internodia 1-2 cm longa. Foliorum petiolus ca. 5 mm longus, supra 

 paulo canaliculatus ; lamina 10-15 cm longa, 3-5 cm lata, ovato-laneeolata, basin 

 versus longe acutata et in petiolum decurrens, rigida, apicem versus in cuspidem 

 1-1.5 cm longam obtusam sat sensim contracta, supra (exsiccata) sordide viridis, 

 subtus olivacea ; costa supra vix depressa, subtus valde prominens teres et 

 rubeseens; nervi laterales I tenues; reticulum venularum densissimum, utroque 

 latere elevatum. Flos (unicus obvius) 2 cm longe pedunculatus ; pedicelli rigidi, 

 glabri. Petala oblonga, apice rotundata, exteriora ca. 14 mm longa, 6 mm lata, 

 interiora^ea. 15 mm longa. 7 mm lata. Stamina 1.5-2 mm longa, disco piano 

 glabro. Monocarpia numerosa, immatura nigra, obovoidea, obtusa, 8-10 mm 

 longa, 4-5 mm crassa, in stipitem 6-7 mm longum contracta. 



VENEZUELA: Merida, Pueblos del Sur, alt. 1600-2200 m, Bernardi 2255 (type NY, 

 cotype S). 



This species agrees in most respects with G. giaberrima R. E. Fr. (known 

 from Ecuador), which, however, even in early stages of development has quite 

 glabrous branchlets and leaves. In G. longedecurrens the network of veins is 

 very elevated and conspicuous, especially on the under side. It differs from 

 G . giaberrima also in its broader, ovate-lanceolate leaves. 



Cxandra venezuelana R. E. Fr., sp. nov. 



Arbor alta; ramuli glabri; internodia 1-1.5 cm longa. Foliorum lamina 

 rigida, giaberrima, flavovirens, ovato-oblanceolata, basi rotundata vel brevissime 



7 P,y Robert E. 



Fries. 



