18 SCANDINAVIANS AND 



Tolf nya slag af Urtictp-slaktet fr&n Vestindien, 1787. 



Beskrifning ])& nio nasslor (frt/rrO, hvilka uyligen p& Jamaica blifvit upp- 

 tackta och beskrifna af O. Swartz, 1787. 



Xova Genera et Specie.? Plantarum, etc., 1788. 



Cinchona auffit.itifulia.en okand vast frftn Vastindien, 1788. 



Solandi-fi, ett nytt slakte ivkn Vastindien, 1788. 



Quassia excelsa,eTi ny vaxt fran Tastindien, 1788. 



Stylanlhus, ett nytt ortslakte, 1788. 



Observationes botaniciF quibus planfct' Indite oecidentalis, 1791. 



Icones plantarum ineognitarum quas in India occidentale delexit atque deli- 

 neavit, 1794. 



Flora IndiiTp oecidentalis aucta atque illustrata, etc., 1797 — 1806. 



Synopsis f ilicum, 1806. 



Lichenes Americani, 1811. 



Flora Bartholomensis et Guadaloupensis. 182.5 & 1827. 



5. JUSSIEUAN PERIOD, 1789-1819. 



This period begins with the publication of the Genera Fhiniarum secnndum 

 orrlines >iatar(iles clisposHa by Antoine L. de .Jussieu. In this appears for the first 

 time a system of classification based on the natural relationship of the plants. 

 This .system was in reality founded by his uncle, Bernard de Jussieu, but never 

 published. The system was much more natural than the sexual SA'stem of Lin- 

 nisus. but was also much more complicated. As it had many Inconsistencies, and 

 as there was no uniformity in the names of the families, it did not receive the ad- 

 herents that it deseri'ed, and there are few books in which we find it used during 

 this period. Even if the Jussieuan system of clas.sifieation did not leave deeper 

 marks on the period which bears its name, it is evident that a new era began at 

 this time, a very active one, especially in systematic botany, with such systemat- 

 ists as Willdenow, Aiton, Sahsbury, Persoon, Sprengel, and Robert Brown, the 

 latter, however, lielonging just as much to the next period. 



Before this time nothing had been published that excluaiveiy treated on North 

 America except Walter's "Flora Caroliniana", which appeared the year before 

 Jussieu's ■'Genera"- During this period were puVjlished all the older floras of this 

 country, viz., those of Michaux, Pursh, Barton, and Bigelow, and Xuttall's "Gen- 

 era". Elliott's work was published a few years after the beginning of the next. 

 H. Muhlenberg and C. C. Robin belonged to this time. Lewis and Clark made 

 their famous expedition across the continent, A. Poiteau, John Lunan, and G. 

 Richard de Tussac explored the West Indies, David Cranz, a Moravian missio- 

 nary, collected in Greenland, and another one of the same creed, Kolmeister, in 

 Labrador. 



The following Scandinavians partook in the work; none of them, however, 

 contributed anything important to the knowledge of the flora of the continent. 

 Their A^ork was mostly limited to the West Indies. 



A. West Indies. 



John Ryan was a planter on St. Croix. When and where he 

 was born and when he died, I have not been able to ascertain, but 



