FURTHER OBSERVATIONS ON CHLORANTHY IN 
DROSERA INTERMEDIA 
MICHAEL LEVINE 
(WITH PLATE XIII AND THREE FIGURES) 
NAvuDIN (15) was among the first to record a new method 
of propagation other than by seed for the genus Drosera. He 
described the appearance of buds of two young plants on the dorsal 
surface of a mature leaf of Drosera intermedia. These buds 
appeared between the midvein and the margins of the leaf. 
KiRSCHLEGER (8) made similar observations in the case of D. 
capensis. He noted buds arising from the epidermal cells at the 
apex or near the base of the leaf, or on the petiole itself. This 
Species was later studied by WINKLER (19), who confirmed the 
observations of KIRSCHLEGER. NITSCHKE (14) described vege- 
tative budding for D. rotundifolia from material collected in the 
field. The buds are described as appearing on the dorsal surface 
of the leaf, and were most commonly found in the early fall. Others 
have confirmed and extended the observations of NitscHKE and 
the earlier data to which I have referred. Grout (7) ascribes 
the appearance of these buds to excessive moisture conditions. 
Graves (6) in 1896 collected and placed plants of D. rotundifolia 
in an artificial bog. He found that a number of small plants 
appeared on the upper surface of old leaves, and in some cases these 
plants appeared from the ventral surface and edges of the leaf as in 
Bryophylium. Lravrrt (9, 12) was able to propagate D. filiformis, 
D. binata, and D. dichotoma from cut leaves. He noticed that 
after placing leaves of the species named in sphagnum for a period 
about 3 weeks new plants appeared from adventitious buds, 
which finally grew to maturity. He likewise observed that leaves, 
first formed from such buds in plants of D. binata, were orbicular 
like those of D. rotundifolia; while leaves coming from buds on 
D. filiformis were like those of D. intermedia. These observations, 
together with other studies on reversion (LEAvittT 10), led him to 
389] [Botanical Gazette, vol. 62 
