NOTES ON NORTH BRAZILIAN GENTIANE^. 199 



. in inundated places at the cataracts of Panure, on the Kio TJaupes, 



in December, 1852. 



The <7. minor (H, B. K.) is unknown to me, but is supposed to be a 

 dwarf variety of C. spicafa. 



m 



ScHULTESiA, Mart. 



The only species of this genus, gathered by Mr. Spruce, is the S. suh- 

 crenata, Griseb. (Linnsea, vol. xxii. p. 34), a curious little plant with 

 yellow flowers, which he found in sands in inundated situations near 

 Santarenij in August, 1850. His specimens correspond precisely with 

 those of the Schomburgka (Eob. Schomb. 2nd coll. n. 481; Kich. 

 Schomb. n. 793). 



LisiANTHUS, Idnn,^ et Irlbachia, Mart, 



The genus Irlbachia was established by Martins for his J. elegans^ 

 relying chiefly on the glands of the corolla and the ecMnate pollen. 

 Grisebach, iu adopting the genus, has neglected these characters, but 

 extended it so as to include the Lmanthus ccerulescens , deriving the 

 character mainly from the narrow linear lobes of the style ; but that 

 occurs also iu some of the annual Luianthiy as in L, tenuifoUuSj L. brevU 

 florus^ etc., and passes gradually into the broader lobes of L. nliginosm 

 and others. The calyx valvaris also, prefixed to the character of Irlba- 

 cJiia^ must be a mistake ; the lobes are certainly imbricate in X. cceru- 

 lescens, and are also represented so in Martins* excellent figure of 

 i. elegans. Some of the new species discovered by Spruce tend still 

 further to do away with all distinction between the two genera. lAsi- 

 antJiua therefore, to which Grisebach has himself correctly reunited 

 LeiotJiamnm and Symholanthus^ becomes a numerous South American 

 genus, with species very different indeed from each other in the size 

 and colour of the flowers, but connected together by a series of inter- 

 naediates, and united by good common characters, 



Mr. Spruce's collections contain four undescribed species, with short, 

 almost campanulate white flowers, which must be very nearly allied to 

 the Irlbachia Bonplandiana of Penzl, but with still shorter corollas and 

 a bilamellate stigma*- These I propose to unite in a distinct section 

 of LisianthuB^ with the following characters ; 



* Some error, possibly typographical, must have crept into Fenzl's description : 

 " stylo bicruri, stigmate simpUcissimo acuto termiuatum," an expression not very 

 iutf Iligible, independently of the grammatical fault. 



