1957] 



BOTANY OF THE CHIMANTA MASSIF— -I 



427 



TYPE: swampy savanna in depression along tributary valley of east branch of 

 headwaters of Rio Tirica, Central Section, Chimanta Massif, Bolivar, Venezuela, 

 2120 m alt., February 13, 1955, Julian A. Steyermark & John J. Wurdack 851 

 (holotype NY, isotype F). Paratype: swampy depression in wet savanna along 

 east branch of headwaters of Rio Tirica, Central Section, Chimanta Massif, 

 February 12, 1955, Steyermark & Wurdack 816. 



V. angusta is closely related to V. schomburgkii Schultz- Bip., differing in 

 the smaller, proportionately narrower leaves, sparser pubescence throughout, and 

 generally fewer capitula in a relatively more elongated inflorescence. 



Stenopadus chimantensis Maguire, Steyermark, & Wurdack, sp. nov. 29 



Frutex vel arbor 2-5-metralis, ramis novellis fulvo-tomentosis vetustioribus 

 glabris; foliis alternis apice ramorum confertis petiolatis, petiolis incrassatis 

 4-7 mm longis 4-5 mm latis, fulvo-tomentosis demum glabrescentibus, laminis 

 adscendentibus coriaceis supra atroviridibus subtus pallidioribus late obovatis 

 vel subrotundato-obovatis, 7-15 cm longis 3-9 cm latis, leviter revolutis penni- 

 nerviis, nervis lateralibus utroque latere 6-8 utrinque prominulis, costa media 

 subtus elevata, novellis utrinque fulvo-strigillosis vetustioribus parce remoteque 

 strigillosis vel glabrescentibus; capitulis solitariis apice ramorum sessilibus 

 homogamis 22-44-floris; involucro late campanulato, 3.0-4.0 cm longo 2.5-3 cm 

 lato ca. 6-8-seriato, phyllariis valde gradatis adpressis extus cinereo-ochroleuco- 

 strigillosis, exterioribus coriaceis late ovatis vel oblongo-ovatis obtusis, 0.8-2.3 

 cm longis 0.6-0.8 cm latis, intimis chartaceis lanceolatis subacutis 3.2-3.4 cm 

 longis 4-5 mm latis; receptaculo subplano alveolato 7 mm diam., alveolis parce 

 adpresso-puberulis marginibus alveolarum glabris; paleis 4-5 chartaceis persi- 

 stentibus subulato-setaceis, 3 cm longis 0.5 mm latis, apice extus hispidulis 

 marginibus serrulato-hispidulis; floribus 22-44 subventricosis, actinomorphicis 

 stramineis vel vinaceis; corollis 33 mm longis, glabris, tubo stramineo prisma- 

 tic o-cylindrico , (18) 20-25 mm longo 2.5 mm lato, lobis 5, vinaceis linearibus 

 acutis, 17 mm longis 1 mm latis, valde revolutis; filamentis vinaceis, in sinibus 



affixis; antheris stramineis linearibus, 12.5 mm longis, appendicibus terminalibus 

 triangularibus subacutis, 1 mm longis, caudicibus sagittatis lineari-lanceolatis 

 falcato-acuminatis retrorse serrulatis; stylo 45 mm longo, scabrido-papilloso, 

 ramis adpressis ab corona carnosa 1 mm longa subtentis; achaeniis fulvis vel 

 atrobrunneis lineari-cylindricis 10-costatis, 9 mm longis 2 mm latis, pappo stra- 

 mineo 3-5-seriato, ad 18 mm longo, hispidulo, longioribus apice dilatatis. 



TYPE: on summit, at edge of escarpment in and among zanjones, Torono-tepui, 

 Chimanta Massif, Bolivar, Venezuela, 2165-2180 m alt., February 9, 1955, Julian 

 A. Steyermark & John J. Wurdack 652 (holotype NY; isotype F). Paratypes: 

 around rocky ground, east-central portion of summit of Apacara-tepui, Chimanta 

 Massif, 2450-2500 m alt., June 21-22, 1953, Steyermark 75875; swampy depression 

 in wet savanna along east branch of headwaters of Rio Tirica, Central Section, 

 Chimanta Massif, 2120 m alt., February 12, 1955, Steyermark & Wurdack 787. 



Stenopadus af finis Maguire, Steyermark & Wurdack, sp. nov. 



Arbor 10-12-metralis, ramis teretibus griseis juvenilibus parce strigosis 

 vetustioribus glabris; foliis alternis petiolatis, petiolis 4-15(-35) mm longis 

 2-2.5 mm latis, parce strigillosis demum glabris, laminis patentibus chartaceo- 

 coriaceis supra atroviridibus nitidis subtus pallido-viridibus elliptic o-ovatis 

 vel obovatis acutis vel obtusiusculis, 5-15 (-20) cm longis 2.5-6.5 cm latis, 



29 A generic description and key to the species of Stenopadus is to be found in Mem. 

 N. Y. Bot. Gard. 9:379, 380. 



