LOT 
placentae is suggestive of many other cases of fusion of flowe 
parts (Fig. 9). 
Interest in the questions of family relationships has been 
connected with the fact that the Systematic Section of the 
Brooklyn Botanic Garden is laid out approximately by the 
Engler system. ™ 
Most adjoining families in our Garden resemble 
UMBELLIFLORAE , 
ay 
MYRTALES —__ !} 
OPUNTIALES ~ N 
7 PARIETALES 2 : 
(i a MALVALES ve ‘ 
{ ! 
oF RHAMNALES ' 
y at ‘6, ) } 
8 2%, " SAPINDALES 4 
4 % ¢. ON ) / 
% ‘ 2 GERANIALES / 
Y S bi \ oe 
4 5 te ROSALES 1=<=~ 
Be} 3 ra) N 
c S \ 
>, < é SARRACENIALES 
es % %S 1 
SS en RHOEADALES 2 / 
‘0 (“A \ A a 
A oe \ “Ss Ld 
~ > ~~~. RANALES 1-7 
\ \ \ 
x CENTROSPERMAE 
\ 
: POLYGONALES -—~ r 
\ 
--ARISTOLOCHIALES ; 
4 
PIPERALES ~----7 
Orders of Dicotyledons (in part), after Engler, ee Nis showing 
posible ea ae ines from Engler diagram, 
Additional lines: ee with saNaete or single car ae 2, Groups 
largely with parietal ce remaining groups mostly with axile or 
central placentation. (10,389) 
one another to some extent, though in some instances, for ex- 
ample Aristolochiaceae, this is definitely not the case 
Tlerbarium Research and Field Work 
By Henry Ix. SVENSON 
arly in the year an account of the vegetation of Middle 
Tennessee was published in the Journal of the Tennessee Academy 
