

44 



GEOGEAPHICAt, DISTRIBUTION. 



The highest kind of morphological evidence is, as we haye already seen, that derived 



- 



from the structure of the corolla. 



It h 



been 



? 



seen that Orthorrhynchous 



and 



Siphonanthous corollas, while negativing the suggestion of a progressive development the 



one from the other, agree in indicating a 



indicati 



Rhyncholoph 



typ 



development of both from corollas of 

 It has also been seen that many natural groups exhibit the 



transition from Rhyncholoph 



to Anodontous coroll 



) 



d that there is 



strong 



presumptive evidence of the independent evolution of Bidentate from Anodontous 

 corollas. We are thus led to the conclusion that among the Anodontous corollas we see 

 the most archaic types exhibited by the genus at the present time. 



It 



clear from th 



very natural sections exist 



difficulty that has been experienced in classification that no 



the 



genus 



I 



the meantime therefore it 



waive a 



fundamental charact 

 beak on the 



deration of the distribution by these 



necessary to 



which classification is founded 



But fortunately the very natural and 



the absence or presence of a 



►liar— and which divides the genus as a whole into two almost 



qual 



prince. The evidence of Peuphrasioides, as already said, has to be discounted. It is a Temperate rather than an Arctic 



Alpine species 



cireumpol 



been 



P 



In the first place, it is the most highly specialised of all the Arctic species 



T the m 03t hlgh j speciahsed and mogt characteristically American group of the Rhyncholoph ^ Then the remaia . 

 members of this group (P. t ncurva- Andes of Colombia and R attollens- California) are endemic in America and absolutely 

 extra-Arc he, while their nearest ally (P. excelsa) is endemic in the Himalaya and is also extra. Arctic. Finally, P. groenlal 

 dica ^ itself is not peculiar to Greenland, but extends thither northwards from New Mexico an^ ^>;^« *■—-* *'-- 

 Rocky Mountains, Rupert's Land, and Labrador. The annexed tables more fully explain this note : 



Table XVIII. 



of distribution ft 



and Greenland. 



8 pedes. 



1. P. Menziesii 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 



10. 



11. 



12. 





• •• 



yerticillata , . . 



Oederi 



••• 



hirsuta 



4 • * 



lanata 



9 • • 



Langsdorfii ... 



capitata 



• • • 



Chamissonis .„ 



enphrasioides 



palustris 

 sudetica 



t •• 



• • • 



pedicellata ,*. 



Totals 



• • • 



Percentages 



• • . 



ALA8RJ1, 



Endemic. 



1 



• • • 



t • • 



» * m 



• •• 



mm 



• •• 



• • t 



. *« 



m *#- 



1 



2 



166 



To 

 America 



• • • 



» • * 



• • • 



• »• 



• « % 



r. • 



• • • 



1 



1 



• •« 



t . • 



2 



16-6 



To 

 Greenland, 



»•» 



• r i 



• •• 



1 



1 



99 * 



• m t 



* m m 



i 



*«« 



••• 



3 



25 



To Arctic 

 Siberia, 



• •i 



i 



i 



i 



i 



i 



i 



i 



i 



i 



i 



• • • 



10 



833 



Greenland 



1. 1*. hirsuta 



2. 



3. 



4 



5. 



6. 





lanata 



• • • 



euphrasioides 

 lapponica ... 

 flammea 



groenlandica 



Totals 



Percentages 



••• 



Ta 

 America. 





• ♦ ♦ 



i 



i 



i 



i 



4 



666 





*•« 



3 



600 





. 



To 

 Alaska. 



Ta 

 Lapland. 



l 



i 



l 



99m 



i 



• • • 



m mm 



i 







1 



3 



500 





