genera, six are restricted to North Ameiica and .Vsia, viz: Ccv/o- 

 'pleurum^ Coniosclhi/ini^ CrxptotiOiia^ ./)iscopleiira^ Osinorhiza^ 

 and Phelloptcn(s\ no u;enus is restricted to Nortii America and 

 Europe; four genera are common to the whole northern hemi- 

 sphere, not extending southward, \iz: CJucropJiylhini^ Cicuta., 

 Heraclf/im, and Lig-usticuin; tlirec genera extend only into Mexi- 

 co and South America, viz: Apiastrum^ Bowlcsia^ and Ve/cea; 

 sixteen genera are world-wide in their distribution, viz: Angelica^ 

 Apium ^ Berula^ Bupleurum^ Caiii/ii, Caucalis, Crantzia^ Dati- 

 cus^ Eryngiu7n^ Hydi-ocotyle^ CEnanthe^ Peucedanutn^ Pimpinella^ 

 Sajiicula^ Sel'mjim^ and Shnn\ our twenty-two strictly North 

 American genera are Alctes^ .{}?ii)iosc/ii/?/iii^ Coloptera^ Cyn/op- 

 tcrns, Cynosciadium^ Erigenia^ EtilopJuis^ Eurytcvnia^ Har- 

 bonria^ Lcptocaulis, Leptotcenia^ Museniopsis, Museniufn^ Oreoxis^ 

 Orogenia^ Podistera, Polytcciiia^ P scndocy mopterus ^ yiiaspium^ 

 Tiedemanina^ Trcpocarptis^ and Zizia. It will be seen that so far 

 as North American Umbellifene have received any impress froni 

 other continents the dominant influence has been Asiatic, at least 

 25 of the genera being common to that continent. In regard to 

 the 13 native species found also in other countries, 10 are found 

 in Asia, viz: PhcHopjicr/is littoral is (common to W. North Ameri- 

 ca and E. Asia), Osmorhizu loiigistylis and Cryptotcenia Canadensis 

 (common to E. North Air.crica and E. Asia), Siuin cicittivfoliiim and 

 Ccelopleiirum Gmelini (widely distributed throughout North Ameri- 

 ca and Asia), Ligiisticimi Scoticum ixnd Berula angustifolia (extend- 

 ing also into Europe), and Hydt'ocotylc Asiatica and H. verticillata 

 (extending trom Asia and the Polynesian Islands into Africa). 

 The three remaining species, viz: Apium Icptophyllum^ Crantzia 

 lifieata^ and Hydrocotylc Americana, are distributed throughout the 

 southern hemisphere, extending north only in North America. 

 This, of course, only represents the present view regarding species. 

 When those of different continents are more thoroughly compared, 

 doubtless manv more species will be merged. 



Comparing the North American IJ mbcllifera^ with the 

 foreign representatives of the order, the North American cast is 

 furnished by such forms as the aliundant we; tern display of 

 acaulescent dr\- ground Peucedanums and tlieir allies, species of 

 Cymopterus and their allies, as well as the peculiar western 

 Saniculas. 



