1957] 



THE BOTANY OF THE GUAYANA HIGHLAND— PART II 



385 



4-8 m high, leaves sericeous beneath, occasional, upper slopes below saddle 

 between North Peak and central plateau, 2300 m alt., Ilu-tepui, March 15, 1952, 

 Maguire 33415. 



9. Stenopadus ventricosus Maguire & Aristeguieta, sp. nov. 



Arbor mediocris; ramulis dense strigoso-tomentosis, cum pilis fuscis mal- 

 pighioideis; foliis alternis, larainis firme chartaceis rhomboideo-oblanceolatis, 

 (6) 10-15 cm longis, 5-6 cm latis, dense et compacte strigoso-tomentosis subtus, 

 costa prominenti, venis lateralibus primariis 5-6-jugis, subtus prominulis, supra 

 improminulisg apice obtusiusculo vel acutiusculo* basi anguste acute vel acumi- 

 nata; petiolo 15-25 mm longo; capitulo solitario, sessili, terminali, paucis 

 bracteoideis foliis subtento, 25-30-floro, homogamo; involucro angusta campanu- 

 lato, 4.5-5.0 cm longo, in alabastro rhomboideo; phyllariis ca. 35, 6-7-seriatis, 

 glabris, anguste scarioso-marginatis, lucidis carnosis sed non carinatis, inferio- 

 ribus late deltoideis vel oblongo-ovatis obtusis, 5-20 mm longis, superioribus 

 oblongo-lanceolatis 30-45 mm longis obtusis, intimis angustis subcucullatis; 

 receptaculo glabro alveolato. epaleaceo; corollis subcarnosis, tubo ventricoso- 

 urceolato 12-13 mm longo. 6-7 mm diam. (8 nm compresso), lobis valde circin- 

 natis, ca. 18 mm longis, 1.5 mm latis, 3-venosis, apice acutiusculo aliquantum 

 dorsiventraliter compresso; filamentis filiformibus, longiexsertis. in sinibus 

 affixis. ad sinum dilatatis, tubi basi adnatis; antheris 14-15 mm longis, ap- 

 pendicibus apicalibus ca. 3.5 mm longis, acutissimis, appendicibus caudalibus 

 sagittatis ca. 4 mm longis, linearibus, apicibus eroso-acuminatis, adjacentibus 

 omnino connatis; stylis subulatis, ca. 4.5 cm longis, sursum asperulis, ramulis 

 1.2-1.5 mm longis,, aliquantum compressis, obtusis; achaeniis ca. 5 mm longis, 

 nigro-purpureis s glabris, 5-angulatis. 10-nervatis; annulo deficienti; corona ca. 

 1 mm longa s truncata; pappo sordido s ca. 20 mm longo, 3-4-seriato, setis fili- 

 formibus. inconspicue barbellatis. 



TYPE: tree 10-12 m high, flowers cream-white, occasional, margin of wood- 

 land, east slope at 2200 m alt., Serra do Sol (Uei-tepul), Brazilian, Venezuelan 

 frontier, Terr. Rio Branco, Brazil, Edo. Bolivar, Venezuela, December 28. 1954, 

 Maguire & Maguire 40401 (NY). 



Distribution. Known only from the type locality, occurring as small to medium 

 trees about montane forest margins, on the summit of Serra do Sol. Most closely 

 related to S. sericeus from Ilu-tepui some 100 km to the northward. 



Section 4. Stenopadus. 



Heads solitary or sometimes 2-3? 15-40- flowered; corolla infundibuliform, the 

 filaments attached in the sinuses; receptacle strongly paleaceous; achenes 

 prismatic; corona prismatic, slightly 5-sulcate, often pubescent; pappus 5-8- 

 seriate, the setae narrowly subpaleaceous, flattened and united at the base; 

 leaf-blade strongly reticulate-veined. 



TYPE: Stenopadus talaumifolius Blake. 



10. Stenopadus talaumifolius Blake, Bull. Torrey Club 58: 491. 1931. 



TYPE: Savanna Hill at 4400 ft alt., Cerro Duida, Amazonas, Venezuela, 

 Tate 759 (NY). 



Known only by the type collection. 



11. Stenopadus eurylepis Blake, Bull. Torrey Club 58: 492. 1931. 



TYPE: Agiiitao at 3100 ft alt., Cerro Duida, Amazonas, Venezuela, Tate 

 935 (NY). 



Known only by the type collection. 



