144 University of California Publications in Agricultural Sciences [\o\. 4 



Another very different greenhouse plant, described as "stout 

 dwarf" (fig. 25, third from left), gave among 29 progeny (table 38) 

 5 (7) individuals evidently not Snowflake. which may have been 

 narrow-dark or may have belonged to another type that was somewhat 

 similar under the conditions of the tests. The parent resembled 

 Snowflake except in its short internodes and short, stout capsules. 



Four otliser plants suspected of mutation apparently entirely failed 

 to repeat their type in their progeny, perhaps because of the smallness 

 of the house cultures. One of these was the plant, much branched 

 for the warm greenhouse, third from the right in figure 18; another 

 was a very late plant with a remarkably large number of main-stem 

 leaves; the others were a plant with unusually small flowers and one 

 with some of the leaves somewhat spatulate. Possibly all of these were 

 Snowflake. though the second, which gave poor germination, probably 

 was not. All these four plants have been included as Snowflake 

 parents for tables showing numbers of apparent mutants. 



The small-smooth-leaved type is well shown in figure 25 (first and 

 fifth from the left) . It is the smallest and weakest of the fairly common 

 and definitely identified types ; it has small, very smooth leaves, and is 

 late in blooming. The two plants shown were both singles, but they 

 set no seed. 



The semicrenate-leaved type (table 3) differed slightly but appar- 

 ently definitely from Snowflake, somewhat resembling crcnate-leaved 

 in leaf form. The one "pointed-crenate-leaved" plant of table 3 may 

 have been crenate-leaved. The "compact" and "curly-leaved" plants 

 of this table have not been identified with any aberrant types in other 

 cultures. With the remaining six types of table 3 all the individuals 

 have been questioned as possibly Snowflake ; it is now practically cer- 

 tain that some of those in the second, third, and fourth groups 

 belonged to the large-leaved type since studied, but the apparent inter- 

 gradation with Snowflake makes any attempt at a definite reclassi- 

 fication from the records a matter of doubtful value. 



The second plant from the right in figure 25 was remarkable for 

 its short stem and few but large leaves. Several other more or less 

 exceptional individuals have appeared in the cultures, especially among 

 some plants with abnormal cotyledons, selected from large niuiibers of 

 greenhouse seedlings in the 1908 cultures, which were examined for 

 syncotyledony. Some of these were very weak plants which finally 

 died without flowering. 



