26 ARISAEMA TRIPHYLLUM 
This result has been repeated with slight variations during the 
three seasons. Cultures kept in the greenhouse from the time of 
planting, those allowed to freeze sharply two or three times and 
then brought into the greenhouse, and others allowed to remain 
outside during the entire winter all showed about the same 
ratio of percentage of seeds producing functional plumules and 
of those germinating blindly. These findings have been further 
strengthened by the discovery, in cultures of A. triphyllum, of corms 
without plumules, very similar to those of A. Dracontium during 
the growing season. 
Briefly stated, A. triphyllum seeds produce during the first 
season underground stems or corms in which is stored the trans- 
formed food from the endosperm in the case of those germinating 
“blind,” and in addition to this food, that which is produced by 
photosynthesis in the first leaf in the case of those producing func- 
tional plumules. At the end of the first growing season the corms, 
surrounded by a layer of periderm, surmounted by a single terminal 
bud, and entirely free from roots and seed remnants, have much the 
appearance of well nourished mature plants except in size. The 
largest corms found were in cultures with a total growth period of 
fifteen weeks. They were 15 mm. long and 12 mm. thick. The 
range of size in the corms of these cultures was from 5-12 mm. in 
thickness and 6-15 mm. in length, with the exception of a few 
which were about the size of seeds. The number of these small 
corms was so nearly that of blind germinations in each culture 
that a relation between the two is certainly suggested. Fics. 61, 
62 (PLATE 4) are from photographs of two such groups of corms. 
Fic. 61 probably represents the blind or incomplete germinations 
and Fic. 62 a part of the complete germinations from seeds of one 
planting. 
Some data concerning conditions for germination, not given by 
previous investigators, may well be given here. Seeds freed from 
the pulp were planted 2 cm. deep in rich loam in flower pots on 
November 16. These cultures were divided into three groups, 
A, B, C, and subjected to different conditions as follows: 
A. These cultures were left in the greenhouse at an average 
temperature of 70° F. from the time of planting. The first leaves 
appeared above the soil January 15. The last leaves to appear 
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