178 



We must not be surprised therefore to find that while the 

 total number of species, varieties and named forms included in 

 Henry's Flora is 2,359, the total enumerated b}' Piper reaches 

 2,511. Of this number, allowing for differences in nomenclature 

 and in the views held by the two authors regarding specific 

 limits, and excluding 28 of Henry's species that are definitely 

 rejected by Piper, there are common to both manuals 1,517 

 named forms: in other words, at least 60 per cent of all the species 

 mentioned are common to both districts. 



In Henry's Flora there are 764 species and forms not men- 

 tioned by Piper; in Piper's Flora 928 not mentioned by Henry. 

 Doubtless if the present reviewer were thoroughly conversant 

 with the taxonomic history and bibliography of all these forms, 

 it would be possible to reduce these figures materially by detect- 

 ing identity in names that seem wholly unrelated; but neither 

 his knowledge nor the resources at his command permit such an 

 undertaking. 



Retaining the above totals therefore, a few remarks may be 

 offered on the species which appear in but one of the two manuals. 

 In presenting these observations, the reviewer must presume that 

 both authors have covered their territory with equal thorough- 

 ness. In Professor Piper's Flora, the author has appended to 

 each species a full list of ''Specimens Examined," so that it is 

 possible to confirm very definitely each and ever^^ one; but the 

 scope of a school text-book has not permitted Professor Henry 

 to do this, so that a full confirmation of his species cannot be 

 attained. 



Assuming therefore that the 764 species mentioned only by 

 Henry are all essentially diff^erent from any forms included by 

 Piper, and that their existence within his territory can be defi- 

 nitely confirmed, we find that they can be grouped approximately 

 as follows: 



Two hundred and ninety-six belong to the Rocky Mountain 

 flora, of which at least 40 may also be regarded as Alaskan, and 

 21 occur also on V^ancouver Island; 130 are distinctly \'ancou\'er 

 Island species, including the 21 found also in the Rockies and 12 

 which are also Alaskan; 123 may be regarded as Alaskan, in- 



