11G Bibliographical Notices, 



nor in the African deserts, the shores of Venezuela, and scarcely in 

 the mountains of the South of Europe. Two hundred and ten spe- 

 cies are found in the tropics ; 133 are extra-tropical, of which 45 in- 

 habit the southern hemisphere. The New World affords ISO species, 

 the old 175 : but 12 are common to both. The higher mountains 

 of the Andes yield the greater proportion of species (51), then fol- 

 lows tropical Brazil (46), the Himalaya Mountains (41), the United 

 States (33), the Alpine Flora of Europe and Siberia (32), Hindostan 

 (30). the Cape of Good Hope (25). One hundred and thirty-five 

 species flourish at an elevation exceeding 5000 feet above the level 

 of the sea, 230 below that elevation. The maximum of the family 

 may be considered alpine ; nevertheless the species are rare or al- 

 together wanting in the Alps of Mexico, Java, on the Peak of Tene- 

 riffe, and of Sicily. 



The following is Dr. Grisebach's Conspectus Gentianearum ex 

 methodo analytico dispositus. 



A. iEstivatio corollas dextrorsum contorta. 



a. Stylus distinctus, deciduus. 



a. a. Antherarum loculi absque connectivo oppositi! Corolla rotata, circa 



capsulam marcescens. Trib. I. Chironie.e. 



b. b. Antherae connectivo instructs. 



a . a. Semina placentae immersa. Inflorescentia centrifuga, dichotoma. 

 x. Corolla spectabilis, saepius rotata, demum circa capsulam marce- 

 scens. Trib. II. CuLOREiE. 

 /3. Corolla parvula, infundibuliformis, demum aut supra capsulam 

 torta aut decidua. Trib. IV. Erythr/£ace,<e. 

 b.b. Semina funiculis imposita ! Inflorescentia centripeta. Trib. Ill, 

 Hippies. 



b. Stigma ovario stylo persistenti impositum. 



a. a. Inflorescentia dichotoma. Sepala connexa. Stylus distinctus. 



Trib. V. LlSYANTHE.E. 



b, b. Inflorescentia racemiformis. Sepala sublibera 1. rnembrana intra- 



calycina juncta. Stylus saepius 0. Trib. VI. SvvertiejE. 



B. jEstivatio corollas induplicativa. Trib. VII. Menyanthide/e. 



I. ClIIRONIE.E. 



A. Stigma indivisum. Antherarum rima contigua. 



a. Placentae valvares. Antherarum rima elongata ... 1. Chironia, L, 



b. Placentae demum centrales libera?. Antherarum 



rima poriformis 2. Exacum, L. 



B. Stigma bicrure. Antherarum loculi distincti. 



a. Antherae strictae rima? poriformes. Stigma immu- 



tatum 3 . Dej antra, Cham. 



b. Antherae spirales rima elongata. Stigma spirale. Sabbatia Sect. 



PaeudoGh ironia. 



