THE BOTANY OF THE GUAYANA HIGHLAND— PART II 



367 



terminali di- vel trichotomo denso; capitulis congestis sessilibus 10-11 x 3.5 

 mm, 8-9-floris; involucri subcylindrici squamis ca. 25, 3-4-seriatis apicem 

 versus purpureo-tinctis regulariter gradatis 9 intimis oblongis. obtusis, vel brevi- 

 ter acutis 5 6.5-7 x 1.1-1.5 mm, glabris 5 trinerviis, extimis ovatis, 3.5-4 x 1.5-1.8 

 mm, apicem versus extus parce glanduloso-puberulis, trinerviis; receptaculo 

 convexo glabro vel paucisetuloso; corollis glabris graciliter tubulosis gradatim 

 ampliatis, tubo 4.9 x 0.6 (basi)-0.9 (apice) mm, lobis 0.4 x 0.3 mm; styli ramis 

 longe exsertis flexuoso-recurvatis, 4.5-5.5 mm longis; achaeniis glabris 2.6 mm 

 longis, 5-angulatis; pappi setis ca. 50, barbellatis apicem versus paulo incras- 

 satis plerumque corollae aequantibus vel parce superantibus 5.4 mm longis, 

 sordido-albidis, basi vix coalitis. 



TYPE: shrub 0.7-1.5 m, fls pale lilac, frequent along escarpment overlooking 

 Cano Grande near Cumbre Camp, elev. 1650 m, Cerro de la Neblina, Terr. Ama- 

 zonas, Venezuela, Jan. 10, 1954, Maguire, Wurdack, & Bunting 37210 (NY). 

 Paratypes: upper part of escarpment face above Camp 3, Cerro de la Neblina, 

 elev. 1500- 1700 m, Dec. 27, 1953, Maguire, Wurdack, & Bunting 36959; scrub 

 forest near Cumbre Camp, Cerro de la Neblina, elev. 1700 m, Jan. 4, 1954, 

 Maguire, Wurdack & Bunting 37039; cumbre along west escarpment, Cerro de la 

 Neblina, elev. 1700-1800 m, Jan. 6, 1954, Maguire, Wurdack, & Bunting 37070. 



In general vegetative aspect, E. memorabile is reminiscent of the many 

 coriaceous-leaved Andean species of Sect. Subimbricata, such as E. jahnii. The 

 inflorescence aspect is like that of E. phoenicticum Rob. (sect. Hebeclinium). 

 The convex receptacle would place the Neblina species in sect. Conoclinium 

 (disregarding the very few fugacious spicules). Within the genus Eupatorium, 

 however, only E. roup ali folium Rob. can be ascribed as even a distant floral- 

 character relative of E, memorabile, having the same (albeit much smaller) 

 general capitular characters; the pubescence and leaf characters readily separate 

 the two species. 



Eupatorium bulbosum Aristeguieta, sp. nov. 



Herba perennis erecta 15-30 cm alta, basi bulbosa, ramis juventate pilosis 

 tardius glabratis. Foliis radicalibus suboppositis petiolatis ovatis apice obtusis 

 vel rotundatis basi rotundatis vel subobtusis, 5-9 cm longis, 2.5-5 cm latis, 

 crenato-dentatis membranaceis utrinque sparse pubescentibus penniveniis; 

 petiolo 2.5-4.5 cm longo. Corymbis terminalibus compositis. Capitulis ca. 24- 

 floris, 5 mm altis, 3 mm diametro; pedicellis 2-4 mm longis. Involucri cylindrici 

 squamis 4.5 mm longis, 4-seriatis imbricatis, oblongo-lanceolatis, obtusis, vel 

 subacutis, glabratis. Receptaculo convexo. Corollis 2.8 mm longis, glabris. 

 Achaeniis 1.5 mm longis, scabratis. Pappi setis albis, 2.2 mm longis. 



TYPE: root tuberous, flowers white, locally frequent on talus slopes, Cerro 

 Paru, alt. 1500 m, Territorio Amazonas, Venezuela, Feb. 13, 1951 Richard S. 

 Cowan & John /. Wurdack 31446 (NY). 



This new acaulescent species with a tuber-like rootstalk presents a habit 

 very rare in the genus Eupatorium. However, its floral characters are those of 

 Eupatorium and it seems to be related with E. penninervatum Wurdack, recently 

 described from Cerro Sipapo. 



Eupatorium morichalanum Aristeguieta, sp. nov. 



Suffrutex 1-1.5 m altus, ramosus, caulibus teretibus griseo-pubescentibus. 

 Foliis alternis saepe in axillis proliferis, ovatis vel rhomboideo-ovatis, apice 

 subacutis basi subtruncatis, 4-6.5 cm longis, 2-3 cm latis, serratis, membrana- 

 ceis, supra pubescentibus subtus punctatis pubescentibus, 3-nervatis; petiolo 

 5-12 mm longo. Corymbis terminalibus subdensis. Capitulis 20-25 floris, 6 mm 



