Postelsia 20 
= 
morphous, four-ranked, those of the 
upper and lower ranks almost flat, 
those of the lateral ranks abruptly fold- 
ed over the others. 
Miupe psi ror, and” Cupressus (sect: 
Chamecy paris) p. 197. 
Note on the Taxonomy of the genus Abies. 
The genus Abies as here defined has the 
limits assigned to it by ‘Tournefort* and 
Adanson. fT 
Table II. shows seventeen of the chief points 
of disagreement between species of this genus 
and the occurrence of these characters in those 
sections of the genus which contain any American 
species. Below is given a summary of the num- 
ber of these pointsin which species of the same 
or different sections agree with one another. 
Picea. Bees Tsuga. eo Eu-Abies. 
; 
EN Cea reruns elie 14-17 76t-11| 5-914 516-7 281g 
Hesperopeuce....7144-11 16-17 1I-I3 44-614, 344-816 
PRSU Sage tee ancien 5-916 TI—13 15-17 | 744-1014) 34-1014 
Pseudotsuga....... 516-7 41g-616| 7146-1016) 16-17 6-13 
BueAbiese .< 624...0. 2-816 34-814) 3146-1014, 6-13 10-17 
* Tournefort. Institutiones. 585. pl. 353,354. 1700. 
+ Adanson, Fam. Pl. 2:480. 1763. 
{ The agreement of a constant character with an individually in- 
