THE BOTANY OF THE GUAYANA HIGHLAND— PART II 



391 



a branched shrub from 1-23 dm high, upright in thickets and protected areas, 

 often depressed on wind-swept sites. 



Three genera of Guayanan Mutisieae, viz., Quelchia with regular corollas, and 

 Achnopogon and Neblineae with bilabiate corollas, have laterally disposed, 

 axillary _ compound inflorescences. Peculiar to the three genera (oursX the central 

 axis is monopodial. continuing to grow vegetatively. All odier members of die 

 Guayan Mutisieae have large massive many-flowered heads that seem to termi- 

 nate the axes, hence the stem development is sympodial. The large, relatively 

 massive, solitary heads of Glossarion seem to be axillary and lateral, the central 

 axis thereby being monopodial, as is characteristic of the lianoid genus Mutisia. 



This, if accurately interpreted, cuts across the otherwise prevailing correla- 

 tion of monopodial development and compound laterally disposed inflorescences 

 on the one hand, and sympodial development and large solitary heads on the 

 other. 



Gongylolepis benthamiana Rob. Schomb. var. pubescens Maguire & Wurdack, var. 

 nov. 



Var. benthamianae similis sed ramis foliisque et axibus inflorescentiarum 

 dense sericeo-tomentosis, demum plus minusve glabrescentious; paniculis multi- 

 capitatis, capitulis 12-15- 



TYPE: shrub or small tree to 5 m high, extreme pubescent form, rocky slopes 

 and elevations, savannas, north side of Rio Aponguao, Gran Sabana, at 1200 m 

 alt., Edo. Bolivar, Venezuela, March 27-28, 1952, Bassett Maguire 33640 (NY). 



Typically G. genthamiana is glabrous and has fewer than eight heads. The 

 new variety is fairly common in the type locality, and seems to be the prevailing 

 form there. 



Gongylolepis hiiachamacari Maguire subsp. neblinensis Maguire & V/urdack, 

 subsp. nov. 



Subsp. buachamacari similis sed ramis glabris vix pilosis in axillis foliorum; 

 foliis angustioribus 7-12 cm longis, 15-25 mm latis; inflorescentiis pervalde 

 corymbosis non umbellatis; corollis antherisque flavidis non purpureis. 



TYPE: small tree to 4 m high, involucral bracts maroon, corollas and anther 

 tubes cream-colored, styles maroon, locally frequent, intervale beyond Ridge No. 

 3 9 Southwest Escarpment at 1800 m alt., Cerro de la Neblina 3 Amazonas. Vene- 

 zuela, January 20, 1954, Maguire, W'urdack & Bunting 31353 (NY). 



Neblinaea Maguire & Wurdack, gen. nov. 



Capitula parva, 2-5 flora, homogama, in cymis lateralibus dispositis; invo- 

 lucro anguste cylindrico; phyllariis multiseriatis (12-15) gradatis, oblongo- 

 oblanceolatis vel oblanceolatis Dergamentaceis; receotaculo parvo hemisphaerico 

 epaleaceo hirsuto, minute carnoso squamuloso; corollis submemoranaceis bila- 

 biatis, tubo 5 (8)-nervato, labia exteriore aliquantum arcuata minute 3-dentata, 

 6 (8)-nervata, labis interiore profunde 2-partita, lobis linearibus valde circinnatis, 

 2-nervatis; antheris caudato-sagittatis, appendicibus apicalibus anguste triangu- 

 laribus, appendicibus caudalibus dense puberulis adjacentibus connatis; granis 

 pollinis luteis, tricolpatis, sulcis longiacutis, granis subprolatis, spinulosis, 

 axibus polaribus ca. 50/Li; achaeniis plus minusve angulari-teretibus, obscure 5 

 (lO)-costatis, annulo non evidenti, disco pappifero evidenti, pappo pauci(3)- 

 seriato, setis filiformibus minute barbellatis. Frutex ramosus; foliis oblanceolatis 

 chartaceo-coriaceis, ret iculato-pinninervatis, plus minusve sessilibus. 



TYPUS: Neblinaea promontoriorum Maguire & Wurdack. 



