1961] 



BOTANY OF THE GUAYANA HIGHLANDS PART IV (2) 



15 



mm longis articulatis ; floribus conspicuis ; sepalis 5, imbricatis lanceolatis acutis 

 16-20 mm longis, 7.5-8.5 mm latis, valde multinervatis ; petalis albis obovatis late 

 obtusis 25-40 mm longis, 18-30 mm latis, multinervatis ; staminodiis dimorphicis, 

 in corona 2-3 mm alta dispositis ; staminodiis alternatis, spathulato-oblanceolatis, 

 obtusis, 8.5-9.5 mm longis, ca. 2.5 mm latis, 7-9-nervatis, ad basim interne valde 

 earinatis; appendicibus staminibus oppositis 10-15, squamosis, 3-5 mm longis, 

 simplicibus vel profunde trilaceratis, acuminatis, aristatis ; staminibus 5 in discis 

 depositis, subsessilibus introrsis oblongo-linearibus obtusis, ca. 6 mm longis lateral - 

 iter dehiscentibus ; granis pollinis plus-minusve sphaeroidalibus 3-colporatis, ca. 

 20-22 /ul diam.; ovario 3-loculari, placenta parietali, ovulis numerosis, stylo 

 simplici, integro, subulato ; capsula ca. 12 mm longa septicidali ; seminibus non 

 visis. 



VENEZUELA: Amazonas: Cerro de la Neblina, often locally dominant and abundant, 

 in low Bonnetia scrub at 2000 m alt., north head of Canon Grande; fastigiate shrub or small 

 tree to 6 m high, leaves shining, tremulous; 8 Dec 1957; Maguire, WurdacTc <$- Magwire 42330 

 (holotype, NY) ; Cerro de la Neblina, east basin upper Canon Grande, East Escarpment, alt. 

 2000 m; shrub 3-5 m high, petals white, pale orange at base, abundant; 13 Dec 1957, Maguire, 

 WurdacTc $• Maguire 42383 (paratype) ; abundant and often dominant in Tyleria- Bonnetia 

 scrub, escarpment trail, alt. 2000 m; shrub or small tree 1-5 m high, petals white, pale orange 

 at base; 17 Dec 1957, Maguire, WurdacTc Sr Maguire 42431 (paratype). 



Adenarake Maguire & Wurdack, gen. nov. 



Inflorescentia paniculata, bracteis dissectis, patelliformi-glandulosis, sepalis 

 unicyclicis ; androgynophoro androeciali cupulif ormi ; ; staminodiis 2-seriatis ; 

 staminibus 5; ovario 3-carpellato, placentis centralibus; capsula septicidali; 

 seminibus ellipticis echinnlatis. Fratex; foliis alternatis, stipulis similibus 

 inaequaliter flabelliformibus. 



Typus: Adenarake murietdata Maguire & Wurdack. 



The name is from aden, aSr ( v. gland and arake, apay.Y), cup. 



Adenarake muriculata Maguire & Wurdack, sp. nov. Fig. 27C. 



Frutex parvus tenuis pauciramosus, ad 2 m altum ; ramis 1.5-3.0 mm diam., 

 glabris; foliis alternatis, vulgo 1-3 cm distantibus; petiolis 2-5 mm longis, 

 tenuibus; stipulis similibus, inaequaliter flabelliformibus 2-3 mm longis glandu- 

 loso-denticulatis, demum caducis; laminis elliptico-lanceolatis (3-) 5-8 cm longis, 

 1.8-2.5 cm latis, chartaceis, ad apicem acuminatis ad basim acutis vel acuminatis; 

 margine minute serrulato glanduloso-ciliato, petiolis 2-3 mm longis ; inflores- 

 eentiis anguste paniculatis, bracteis bracteolisque plus minusve dissectis, patelli- 

 formi-glandulosis; pedicellis subfiliformibus 1.5-3.0 cm longis; sepalis 5, unicy- 

 clicis praecipue valvatis, oblongis ca. 5 mm longis, 1.0-1.2 mm latis, ad apicem 

 4-6-pectinato-patelliformiglandulosis ; petalis ellipticis 12-15 mm longis, 6-7 mm 

 latis, acutis; androgynophoro ca. 1.5 mm alto, corona androeceali cupuliformi ca. 

 1 mm alta; staminodiis 2-seriatis, exterioribus 10, lanceolatis 3.0-3.5 cm longis, 

 0.7-0.8 mm latis, staminibus oppositis, interioribus 5, spathulato-oblanceolatis 

 6-7 mm longis, ca. 2 mm latis, 1-nervatis, staminibus alternatis; staminibus 5, 

 filamentis ca. 0.3 mm longis; antheris lanceolatis ca. 4 mm longis, ca. 0.6 mm 

 latis, in apiculum 0.5 mm longum productis, 4-thecatis disto-lateraliter dehiscen- 

 tibus ; ovario ad basim coronae disposito, conico, 3-carpellato, ad basim 3-septato, 

 placentis centralibus, ovulis ca. 20 evidenter anatropis; capsula septicidali, ad 

 basim solo intruso-septata ; seminibus ellipticis, 1.1-1.5 mm longis, 0.7-0.8 mm 

 latis brunneis, bicuspidatis minute echinulatis. 



