19631 



BOTANY OF THE GUAYANA HIGHLANDS PART V 



273 



Schradera puberula Steyermark, sp. nov. 



Suffrutex volubilis, stipulis nou visis ; f oliis petiolatis, petiolis 15-18 mm 

 longis puberulis ; laminis subeoriaceis late ovatis vel oblongo-ovatis apice abrupte 

 acutis vel subacuminatis basi obtusis vel subrotundatis 8.5-12 cm longis 4.7-6.5 

 cm latis, costa media nervis lateralibusque subtus dense pilosulis superficie in- 

 feriore parce vel moderatim puberulenti, nervis lateralibus prineipalibus promi- 

 nentibns elevatis utroque latere 11-13 in nervum collect ivum ab margine 3-5 mm 

 conjunctis, nervis lateralibus minoribus 12-20 tenuiter impressis subreticulatis ; 

 capitnlis subhemisphaericis ca. 8-9-floris 20 mm longis (altis) 38 mm latis (in 

 sicco) ; pedunculo non viso ; involucro subcampannlato 15 mm longo (alto) 35 mm 

 lato dense pnbernlo apice irregnlariter lobato; calyce in fructn 8 mm lato 

 extus puberulo. 



COLOMBIA. Dept. El Valle : Cordillera Occidental, vertiente occidental: 

 bosques Hoya del Rio Digua, lado izquierdo : Piedra de Moler ; alt. 900-1180 m ; 

 arbolito con ramas bejucosas ; hojas semicoriaceas, verde claro ; 19-28 Aug 1943, 

 /. Cuatrecasas 15182 (holotype F). 



Although the material has fruit only, the species is otherwise well-marked in 

 possessing a pubescent calyx and pubescent petioles and lower leaf surface. It 

 is further distinguished from the related 8. lehmannii Standi, by the much 

 shorter involucre and pubescent calyx and leaf -blades, from 8. acuminata Standi, 

 by the pubescent calyx and involucre, and from 8. cuatrecasasii Standi, ex 

 Steyerm. by the pubescent petioles, leaves, and involucre, and pubescence of 

 calyx with longer hairs. 



Schradera rotundata Standi, ex Steyermark, sp. nov. 



Suffrutex volubilis epiphyticus ; stipulis non visis ; foliis petiolatis. petiolis 

 12-40 mm longis glabris; laminis crasso-coriaceis (teste Cuatrecasas) late 

 obovatis apice late rotundatis vel subtruncatis basi cuneatim angustatis acutis vel 

 acuminatis 7.5-16 cm longis 4-8 cm latis utrinque glabris, subtus costa media ele- 

 vata, nervis lateralibus prineipalibus utroque latere 9-19 tenuibus vel paullo promi- 

 nulis nervis minoribus tenuissimis vel obsoletis, in nervum collectivism ab margine 

 5-6 mm conjunctis ; capitulis subhemisphaericis 5— 6-floris 20-25 mm longis 25-30 

 mm latis; pedunculo solitario terminali vel axillari 0.5-1.7 cm longo apice 

 ampliato 6-7 mm lato glabro ; involucro prominenti subcampanulato 13-15 mm 

 alto 27-30 mm lato glabro irregnlariter lobato, lobis ca. 10 suborbicularibus 

 rotundatis 2-3 mm altis 6-7 mm latis ; calyce hypanthioque urceolatis 11 mm 

 longis apice 6 mm latis glabris, calyce apice primo margine truncato integro 

 deinde irregulariter 2-3-lobato, lobis truncatis rhomboideis 0.5 mm altis, ab 

 ovario ad 7 mm disjuncto : corolla alba (teste Cuatrecasas) hypocrateriformi 

 17 mm longa, tubo 11 mm longo basi 2 mm lato fauce 3 mm lato extus glabro 

 intus supra basin 3 mm glabro aliter puberulo, lobis 5 lanceolatis apice subacutis 

 8 mm longis 2 mm latis glabris, denticulo cucullato reflexo triangulari ad basin 

 carinae ab apicem 6 mm ; staminibus 5 in dimidia parte inferiore insertis, 

 antheris linearibus 5 mm longis ; stylo 6 mm longo glabro ; stigmatibus 2 lineari- 

 bus 3.5 mm longis : seminibus fuscis ovalibus rhomboideis vel ovali-oblongis 2 mm 

 longis 1.2-1.5 mm latis tenuissime foveolatis margine breviter alata. 



COLOMBIA. Dept. El Yalle : Costa del Pacifico, Rio Cajambre, Barco ; alt. 

 5-80 m ; frutex epifito, ramas bejucosas : hoja gruesa coriacea, rigida verde oscura 

 haz. verde amarillenta enves ; periantio bianco ; bracteas y ovario verde amari- 



