1953] 



BOTANY OF THE GUAYANA HIGHLAND 



147 



TYPE: low shrub to 1 m. tall, rays yellow, frequent open scrub savanna, 

 Lower Cano Negro, 1400 m. alt., December 25, 1948, Bassett Maguire & Louis 

 Politi 27900; New York Botanical Garden. Paratypes, Cerro Sipapo, Maguire & 

 Politi: shrub to 2 m. tall, flowers yellow, open savanna, Cano Negro, 1500 m. 

 alt., December 15, 1948, 27688A; shrub 1.5 m. high, occasional open scrub sa- 

 vanna, Campo Grande, 1500 m. alt., December 15, 1948, 27672A; shrub to 2 m. 

 high, rays yellow, savannas and terraces southeast slopes North Mt., Peak I, 

 1800 m. alt., 27652; shrub 5 dm. high, rays yellow, occasional terraces along 

 east rim, 2000 m. alt., January 26, 1949, 28634. 



Calea kunhardtii is a handsome shrub generally distributed over the Sipapo 

 cumbre. 



Calea membranacea Maguire & Wurdack, sp. nov. 



Frutex; ramulis castaneis glabris sulcatis in sicco; ramis maturioribus sub- 

 angularibus; foliis oppositis, laminis lanceolatis vel oblanceolatis 6-9 cm. 

 longis 3-4 cm. latis submembranaceis glabris vel minute puberulis minute albo- 

 punctatisque venis lateralibus 6-7 jugis subtus prominulis, marginibus serratis, 

 apice brevi-acuminato, basi acuta, petiolo tenui 4-6 mm. longo; capitulis magnis 

 ca. 2 cm. latis, hemisphaericis solitariis terminalibus vel axillaribus, pedunculis 

 foliaribus 6-8 cm. longis; bracteis involucri exterioribus 4-6 foliaceis 15-17 mm. 

 longis ca. 10 mm. latis ovatis obtusis glabris non-glandulosis, phyllaribus 

 3-4-seriatis, exterioribus oblongis ca. 12 mm. longis 4-5 mm. latis valde 10- 

 nervis, mediis parvioribus, interioribus ca. 8 cm. longis oblanceolatis acutis 

 s.cariosis 1-nervis; floribus ligulatis 8-10, ligulis ca. 15 mm. longis 5-6 mm. 

 latis obtusis 8-10-nervis, floribus discoideis numerosis ca. 6 mm. longis gla- 

 bris, tubo ca. 2 mm. longo, lobis ca. 1 mm. longis subacutis; staminibus ca. 

 2 mm. exsertis, filamentis 1.5 mm. longis, antheris ca 3 mm c longis acute bi- 

 caudatis, appendicibus ca. 0.5 mm. longis triangularibus; pappo squamiformi, 

 squamis 1-2-seriatis 5.5-6.5 mm. longis 0.3-0.4 mm. latis scariosis aristato- 

 attenuatis; stylis ca. 6 mm. longis, stigmatibus subcapitatis; achaeniis 3 mm. 

 longis punctato-maculatis acute 4-angulatis sparse hispidulis. 



TYPE: hierbo 1 m. alta, flores amarillas, sabanas de Uriman, 400 m. alt., 

 en las Orillas del Rio Carom, Guayana, Venezuela, September 18, 1946, F. Car- 

 dona 1612; U. S. National Herbarium; isotype, New York Botanical Garden. 



Calea membranacea is most closely to be associated with C. lucidivenia Gl. 

 & Blake, bu' is strongly set off, differing most conspicuously from the latter 

 species in its much larger thinner leaves, and much larger more numerously flow- 

 ered heads. 



Calea nana Maguire, sp. nov. 



Fruticulus, caudicibus brevibus erectisque vel repentibus; ramis 10-40 

 cm. altis tenuibus simplicibus vel pauciramosis ca. 2 mm. crassis dense hispidu- 

 lis, internodiis 5-10 (30) mm. longis; foliis oppositis subsessilibus 10-15 mm. 

 longis 3-8 mm. latis ovato-acuminatis pauciserratis glabris minute albo-punctatis 

 non glandulosis, triplinervis et reticulatis, basi obtusa vel cuneata; pedunculis 

 2-10 mm. longis dense hispidulis capitulis solitariis terminalibus vel raro axil- 

 laribus; involucro subgradato, bracteis exterioribus 4-5 foliaceis, 6-8 mm. lon- 

 gis, phyllaribus 2-3-seriatis striatis ciliolatis, exterioribus ca 5 mm. longis, in- 

 terioribus 6-7 mm. longis aliquantum angustioribus; floribus ligulatis 5-8, ligulis 

 oblongis flavis 6-10 mm. longis 5-nervis inaequalibus minute 5-crenato-dentatis, 

 unguiculis 2-3 mm. longis, pappo ca. 2 mm. longo, achaeniis compressis 1.5-2.0 

 mm. longis; floribus discoideis 20-30 crateriformibus 3-4 mm. longis, tubo et 

 limbo subaequalibus, lobis oblongo-lanceolatis ca. 1 mm. longis acutis, pappo 

 paleaceo, paleis 1-2-seriatis ca. 2.5 mm. longis acutis ciliolatis, antheris ca. 3 



