1963] 



BOTANY OF THE GUATANA HIGHLANDS PART V 



257 



3-6.5 cm long ; calyx-tube 2-3 mm long, calyx-lobes 5-8 mm long, 3-4 mm wide ; 

 corolla-tube 11-13 mm long ; corolla-lobes 3-5 mm long ; capsule 3.5-4 cm broad, 

 2.5-3 cm long, broader than long ; seed suborbicular-ovate, broadly winged, 2.7-3 

 cm long, 1.5-2 cm broad, the central body olive-brown, 1.2-1.5 cm long, 1-1.1 cm 

 high, the winged portion 3-7 mm wide and rufous-brown, the testa conspicuously 

 and densely papillate. 



Additional specimens examined : VENEZUELA. Bolivar : abundante al norte 

 del Salto Hacha, Canaima ; arbusto 5 m alto ; zona rocosa ; Agosto 1957, Blohm 1 

 (VEX); cumbre de cerro arenisco Cucurital, Alto Caroni; arbusto de 6 m ; 

 24 Feb 1953, Cardona 2825 (NY, VEN) ; Cardona 856, 860 (NY, VEN). 



9. Platycarpum rugosum Steyermark, sp. nov. 



Arbor 8-15 m, ramulis novellis strigosis vel hirsutis; stipulis caducis 

 ealyptriformibus, supremis 2.5-5 cm longis hirsutis; foliis plerumque ternatis 

 erecto-adscendentibus coriaceis petiolatis, laminis ellipticis vel late oblongis apice 

 obtusis rotundatis vel obtuse acutis basi acutis vel obtusis in petiolum 7-11 mm 

 longum strigosum cuneatim angustatis 11-20 cm longis 4-9 cm latis, supra costa 

 media nervis lateralibusque strigosis aliter fere glabris vel leviter scabridulis vel 

 strigosis, subtus praecipue costa media nervis lateralibusque necnon inter nervos 

 valde strigosis pilis ad 2 mm longis venularum reticulo minutissime albo- 

 puncticulato inter reticulum glabris, nervis lateralibus utroque latere 11-16 eis 

 ei costa media elevatis ; petioli plerumque tribus glandulis lateraliter et basilariter 

 insertis duobus lateralibus ellipticis utrinque rotundatis vel subrotundatis glabris 

 1.5-2.5 mm altis 0.75-1.5 mm latis, glandula basilari ventrali inserta lineari- 

 fusiformi 2.5-3 mm longa 0.5 mm alta ; thyrsis terminalibus contractis crebre 

 densifloris ut yidetur 2-4 cm altis 3-3.5 cm latis hirsutis; floribus brevipedicel- 

 latis; calyce 5-mero 9 mm longo, tubo (hypanthio) campanulato-turbinato 3-3.5 

 mm longo (alto) 4 mm lato ferrugineo-strigoso vel -hirsuto vetustiore cano- 

 strigoso, lobis 5 subaequalibus ovatis vel ovato-lanceolatis subacutis 4-5 mm longis 

 3 mm latis intus stramineo-sericeis extus dense strigoso-hirsutis ; corollis ut 

 videtur parvis subcampanulato-infundibuliformibus ut videtur extus ferrugineis 

 intus brunneis atropurpureo-striatis marginibus griseis 9 mm longis extus dense 

 strigosis, tubo 5 mm longo in parte inferiore 4 mm lato intus in parte basilari 

 glabro usque 1.5 mm longo supra basin dense barbato-hirsuto, lobis 5 late ovatis 

 acutis 4-4.5 mm longis 3 mm latis quinto intus breviter pubescenti ceteris intus 

 glabris ; staminibus 5 ; staminum antheris ovoideo-oblongis apice acutiusculis 2.5 

 mm longis 1 mm latis ; filamentis 3 mm longis basi dense barbato-hirsutis superne 

 parce puberulis ; ovario apice hirsuto pilis erectis stramineo-fulvis vestito corona 

 annulari 1.5-2 mm alta instructo ; stylo 4 mm longo glabro ; stigmate 2-fido intus 

 papillato ; eapsulis compressis rotundato-obrenif ormibus 5-6 cm altis valvis 4 

 mericarpiis lignosis 2-2.5 mm crassis extus ferrugineis vel atropurpureis vel 

 atrobrunneis manif este rugosis areolatisque, minutissime tomentulosis ; semini- 

 bus maturis in quoque loculo 2 elliptico-sublunatis 4.2-4.8 cm longis ca. 2.5 cm 

 latis (altis) alatis, alis pallido-brunneis 2-13 mm latis corpusculo fusco vel griseo- 

 brunneo 25-30 mm longo 18-20 mm lato (alto), testa dense prominenter papillata. 



Distribution. Southeastern Venezuela, Estado Bolivar, where known only from 

 summit of Uei-tepui and vicinity. 



VENEZUELA. Bolivar ; dominant in dwarf forest in depressed portion, 

 summit of . L T ei-tepui, northwest of km 125 south of El Dorado; alt. 1340 m; 

 common tree 8-15 m tall ; calyx ferruginous-strigose ; corolla ferruginous-strigose 



