1895.] Bricfer Articdes. 171 
An alternate pubescent line found on the stem is always on the side 
of the axis on which the stronger axillary bud occurs, and on the first 
internode of each branch on that side of the branch next the axis 
from which it arises. In rare instances the two axillary buds were 
found almost equally developed, in which case the main axis has two 
pubescent lines. As these strong axillary buds are apparent even be- 
fore the leaves to which they are axillary unfold, they are an obstacle 
to free growth and also points of greatest pressure in the bud. It 
would seem from this that the utility of pubescence is in this case to 
protect the delicate forming parts from the effects of pressure and fric- 
tion in the bud. 
In accordance with this view the axis, which hasa more rapid growth 
than the leaves, has its pubescence directed downward, while that of 
the leaves is directed upward toward the apex, thus offering the least 
possible resistance to growth. 
Both Gray: and Wood,? in their descriptions of this plant, say that 
the flower-clusters are axillary, but it appears that the peduncle arises 
not from an axillary bud but at the side of the axillary bud which is 
in its normal position. The absence of the axillary bud of the op- 
posite leaf explains this apparent anomaly. Instead of the flower-clus- 
ter arising from an axillary bud it terminates the axis and each suc- 
ceeding internode of the stem arises from the stronger axillary bud of 
the preceding internode. 
Gray describes the inflorescence as a raceme-like cluster and Wood 
calls ita racemous umbel. The raceme and umbel both properly be- 
long to the indeterminate or botryose type of inflorescence, while the 
flower-clusters of Enslenia follow out the same determinate plan ex- 
hibited by the terminal position of the peduncles. This results in that 
form of the scorpioid cyme known as a bostryx, development follow- 
ing the same spiral in the inflorescence as that noted in the stem; thus 
the plane of each pedicel is at right angles to that preceding, and the 
fifth internode bears a flower opposite the first, and the sixth opposite 
that borne by the second, etc 
The development of the weaker axillary bud into a flower doubles 
the number of flowers in the spiral and thus it occurs that the ninth 
flower stands opposite the first. 
Anthesis takes place in the order of tl 
and is in this order: first, third, fifth and second, seventh and fourth, 
ninth and sixth, etc., = pair of numbers corresponding to the buds 
arising from one n 
; Manual of é 
‘Clas st orr 2015 = 
rissstes fe axis 
