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FAMILIES WHOSE LIBRIFORM CONTAINS BoTH KINDs oF PoREs. 
Campanulacez, ; SuB-FaMILIEs. 
Celastracez.. . 
Fagacez. Amygdalez. 
Sapotacer.  - Spireze. 
Myrtaceze. Buxacee. 
FAMILIES WHOSE GENERA DO NOT AGREE IN REFERENCE TO THE PORES. 
Caprifoliacez. Scrophulariacez. 
Oleacez. Solanacez. 
Ranunculacez. Tiliacez. 
Saxifragaceze. Zygophyllez. 
By comparing these results in reference to the families of dif- 
ferent groups, it will be seen that the idea of relationship between 
these families is not sustained by a correspondence in the anatom- 
ical structure of the libriform tissue. 
In the group Labiatiflore, for example, we find the families 
Labiate, Bignoniacee, Acanthacez and Verbenacez all contain 
libriform, with only simple pores; Globulariacee, which accord- 
ing to some authors belongs in this group, has at least one 
example, namely, Globularia with only bordered pores, while 
Scrophulariaceze contains genera which do not agree in this 
respect, that is, some genera contain both bordered and simple 
pores, others only simple pores. The remaining two families 
usually included in this group, viz.: Plantaginee and Lentibu- 
lariaceez, were not examined, as oie contain but few. plants with 
well-developed woody tissue. 
Of the families of another large group, Rosiflore, we find 
Pome, Rosez and Dryadez agree in possessing pores with bor- 
ders, while Spireza and Amygdalee have both kinds. Of this 
group Poteriez, Quillajee and Chrysobalanee were not exam- 
ined. : 
In a number of other groups we find the same difference ex- 
isting between the families composing them, and sometimes.even 
between those families in which a certain degree of.relationship is 
a well established fact; for example, Composite and Dipsacee, 
the former having simple, the latter bordered pis So also 
with Anonacez and Magnoliacez. 
On the other’ hand, there’ are two small groups whose mem- 
bers agree; these are Primulinez, containing the families Prim- 
