Between Drosera filiformis and D. intermedia. 89 
attenuated branches, the majority are long flat ribbons that 
give off numerous narrow branches. 
The upper epidermal cells of this area are of varying shape 
and size, but average 150 X 38 yw. They contain relatively 
few scattered small chloroplasts, each 2.5—-3 “across. Sto- 
mata are not present over this area. Its outer or lower epi- 
dermis consists of longer but narrower cells, 185 X 20 4, 
which are well filled with large chloroplasts each 7.5-8 pu 
across. Amongst these are a few stomata, each 40 X 23-25 p. 
More abundant than the stomata are two-celled sessile glands 
of stoma-like character, each cell being filled with rich finely 
granular substance, and a highly refractive nucleus. 
The leaves of D. intermedia (Plate XII, Fig. 3) are on the 
average 1 14 inches long, and in the blade } inch wide. There 
is a sharp differentiation between petiole and blade, the latter 
becoming both widened out and glandular at its junction with 
the former. At the base of the petiole there is, as in D. 
fuiformis, a somewhat quadrangular area, but here the edges 
slope toward the upper part of the area. It is glabrous 
throughout, except across the upper transverse boundary, 
where are 7 to 10 strong multicellular unbranched, or slightly 
branched, hairs. The epidermal cells are 225 uw X 28 yw and 
contain a very few small chloroplasts. 
The lower epidermis of this area consists of elongated nar- 
row cells measuring 200-225 w X 15 w. It has no stomata, 
and instead of the two-celled glands of D. jiiformis, are 
glandular bifid hairs (Plate XII, Fig. 4c). 
In the hybrid the leaves vary considerably according to 
age and position in the annual rosette, but comparison of its 
leaves with those of D. filiformis and D. intermedia prove that 
this variation is an inherited one from both parents. The 
earlier leaves of the annual rosette in D. fiiformis are com- 
paratively short and taper to a somewhat blunt point, the 
typical summer leaves may be 10-11 inches long and greatly 
attenuate at their tips. In D. cuxtermedia the spring leaves 
