1963] 



BOTANY OF THE GUAYANA HIGHLANDS PART V 



271 



lineis verticalibus puberulis ca. 9 mm longis in parte basilar i glabro; lobis 

 5 lanceolatis subacutis 11 mm longis 2.8-3 mm latis glabris, denticulo cucullato 

 reflexo triangulari 0.2 mm longo ad basin carinae ab apicem 8.5-9 mm ; staminibus 

 5 inclusis in dimidia parte inferiori 9-10 mm supra basin corollae insertis, 

 filamentis 0.5 mm longis ; antheris linearibus 7 mm longis subsessilibus ; stylo 

 21 mm longo superne puberulo aliter glabro ; stigmatibus 2 lineari-oblongis 8 

 mm longis. 



COLOMBIA. Dept. El Valle : Costa del Pacifico ; Rio Yurumangui : entra 

 Isla de Golondro y La Amargura ; alt. 10-40 m; arbusto epifito de ramos 

 tortuosas pendulasj bracteas y caliz verdes; corola blanca; 7 Feb 1944, J. 

 Cuatrecasas 16028 (holotype F) ; Rio Calima (region del Choco) ; La Trojita ; 

 alt. 5-50 m ; arbolito apoyado de ramos bejucosas ; ramos terminales y las hojas 

 coriaceas rigidas verde palidas ; bracteas involucrales y caliz verde palidos ; 

 corola blanca amarillenta ; 19 Feb-10 Mar 1944, Cuatrecasas 16543 (paratype F). 



This species differs from 8. Ichmannii Standi., also of Colombia, in the densely 

 pubescent midrib of the lower side of the leaf, the pilosulous lower leaf surface, 

 the pubescent upper portion of the calyx, and the more densely pubescent outer 

 surface of the involucre and peduncle. The puberulous upper part of the style and 

 elongate corolla and calyx are additional distinctive features of this species. 



Schradera maguirei Steyermark, sp. nov. 



Suffrutex (teste Maguire) metralis, ramis carnosis; stipulis glabris, 5-7 mm 

 longis 2.5 mm latis, subobtusis ; internodiis plurimis brevibus 1.5-3 cm longis ; 

 foliis abrupte petiolatis, petiolis tenuibus 4-5 mm longis 0.75 mm latis, glabris ; 

 laminis parvis carnoso-coriaceis lanceolato-ellipticis vel elliptico-ovatis vel ovato- 

 ellipticis apice abrupte acutis vel obtuse subacuminatis basi obtusis vel subacutis 

 3.5-5 cm longis 1-2.3 cm latis utrinque glabris, subtus costa media elevata, subtus 

 nervis lateralibus obsoletis supra tenuibus utroque latere 6, subrevolutis ; capitulis 

 subhemisphaericis 3-5-floris 15 mm longis 23 cm latis; pedunculo solitario 

 terminali 0.4-0.8 cm longo apice 2.5 mm lato glabro ; involucro 2-3 mm alto 

 9 mm lato glabro remote denticulato dentibus subulatis 0.1-0.2 mm longis; 

 calyce hypanthioque tubulosis 10.5 mm longis apice 4.5 mm latis glabris, calyce 

 apice subtruncato irregulariter 2-3-lobato, lobis suborbicularibus rotundatis 

 0.5-1 mm altis 1.75-3 mm latis; corolla alba (teste Maguire) hypocrateriformi, 

 tubo 6 mm longo fauce 4 mm lata extus glabro intus 3 mm supra basin puberu- 

 lenti aliter glabro, lobis 5 lanceolatis apice subobtusis 6 mm longis 1.5 mm latis 

 glabris, denticulo cucullato reflexo triangulari fere 1 mm longo ad basin carinae 

 ab apicem 3 mm ; staminibus 5-6 inclusis, filamentis 1 mm longis ; antheris 

 linearibus 3.5 mm longis ; stylo 2 mm longo glabro ; stigmatibus 2 ovali-oblongis 

 1.5 mm longis. 



VENEZUELA. Territorio Federal Amazonas: Cerro Guaiquinima; occa- 

 sional in quebrada in dense woodland, North Valley ; alt. 1600-1700 m ; sub- 

 shrub; leaves fleshy-coriaceous; flowers white; 4 Jan 1952, Bassett Maguire 

 32974 (holotype NY, isotype VEN) ; same locality; occasional along quebradas 

 in lateral south drainage of North Valley ; alt. 1700 m ; shrub 1 m high ; leaves 

 coriaceous; flowers white; 2 Jan 1952, Maguire 32907 (paratype NY, VEN). 



This species is most closely related to the Colombian 8. revoluta Standi., from 

 which it differs in lacking lateral nerves on the lower surface of the leaf -blades, 

 the differently shaped abruptly acute to subacuminate leaf-blades, the partly 

 puberulous inner portion of the corolla-tube, and the much shorter involucre. 

 This species, together with S. revoluta, possesses the smallest leaves of the genus. 



