1958] 



THE BOTAXY OF THE GUAYAXA HIGHLAND PART III 



41 



3. Outer bractlets rather strongly nerved, glaucous, strongly glandular-punctate; 



plants of marshy campos, southern Matto Grosso. 3. C. angustatus. 



2. Setae not clavate; spikelets usually 15-25; involucral bracts (3) 4-6 cm long; 

 outer bractlet of the spikelet ca. 8.5 mm long; leaves usually 30-45 cm long, 

 4-6 mm broad; campos of southern Minas Gerais. 1. C. riedelianus. 



1. Outer bractlets mucronate. 



4. Inner bractlets setose, spikelets 8-12; bracts (2.5) 3-5 cm long; leaves 30-50 cm 



long, 3-12 mm broad; confined to Para. 4. C. gracilis. 



4. Inner bractlets mucronate; spikelets 2-3; bracts 2 cm or less long; leaves 4 mm 

 or less broad, 15-30 cm long ; confined to the campos of southern Matto Grosso. 



5. C. microglochin. 



1. Cephalostemon riedelianus Kornieke, Linnaea 37: 445. pi. 1, f. 1-12. 1873. 



Bapatea gracilis Seubert, Fl. Bras. 3 1 : 129, spec. Sello, 1847; not Poepp. & Endl. Nov. 

 Gen. & Sp. 2: 51. 1838. 



Type: in pratis humidis Serra da Lapa, Prov. Minas Gerais. Brazil. Sello s.n. 

 (holotype B). 



Distribution : Campos of southern Minas Gerais and possibly adjacent Goyaz. 

 Brazil. 



2. Cephalostemon affinis Kornieke. Linnaea 37: 447. 1873. 



Type: prope Esmeralda ad numen Orinoco, Dec 1853, Spruce 3228 (holotype 

 P; isotypes G, K, XY). 



Distribution : Open marshy places, Esmeralda Savanna, in the vicinity of 

 Cerro Duida, and Yapacana Savanna, Amazonas, Venezuela, and Tafelberg. 

 Suriname. 



3. Cephalostemon angustatus Malme, Ark. Bot. 26A 9 : 11. 1934. 



Type : loco aperto uliginoso juxta cum Erioeaulaceis, Zyridis spec, etc., Serra 

 da Chapada, Buriti, Matto Grosso, Brazil. June 25, 1894, G. A. Malme 1710 

 (holotype S, isotypes B, S). 



Distribution: Open marshy areas; known only from the type region, Serra 

 da Chapada, south-central Matto Grosso. 



4. Cephalostemon gracilis (Poepp. & Endl.) Rob. Schomburgk, Bapatea Frid. 



Aug. Saxo-Frid. Reg. 9. 1845. 



Bapatea gracilis Poepp. & Endl. Nov. Gen. & Sp. 2: 51. pi. 168. 1838. 



Typo : in paludosis camporum Campinas dictorum ad Colares, versus ostia 

 fluv. Para [Brazil], Junio nor. Poeppig 2986 (holotype B, isotype G). 



Distribution : Paludose plants of open sandy places ; known only from low 

 altitudes in the State of Para, Brazil. 



5. Cephalostemon microglochin Sandwith. Kew Bull. 1929: 125. 1929. 



Type : flowers pale yellow, in moist boggy soil on edge of fringing forest, near 

 source of Rio Paraguay (Rio Amolar), Diamantino, Matto Grosso, Brazil, May 

 23, 1927, Dorrien Smith 151 (holotype K). 



Distribution : Palustrine plants of the campos, southern Matto Grosso, Brazil. 



11. Duckea Maguire, gen. nov. 



Inflorescentia subglobosa, multispicata, bibracteata: spicis lanceolato-fusifor- 

 mibus. unifloris ; bracteolis gradatis imbrieatis ; flore trimero ; sepalis lanceolatis, 

 ad basim connatis; petalis inclusis ad basim connatis; staminibus 6, antheris 

 4-thecatis, poro oblique apicali uno dehiscentibus ; ovario 3-loculari, loculo unio- 



