278 BOTANICAL GAZETTE : [OCTOBER 
August. The remaining plants were pulled out as large rosettes 
in July. 
O. atrovirens XO. cana.—Represented by 55 plants, among which 
8 densa and 17 Jaxa have flowered. They were in all respects like 
the twins of the corresponding cross of O. Lamarckiana. Just 
as in this cross, some specimens had cordate petals and others had 
linear ones, repeating the cruciata type. But on the first plants 
stray flowers with narrower petals were found, from time to time, 
indicating a high degree of fluctuability rather than a splitting into 
two constant and uniform types. 
The reciprocal cross yielded only 23 seedlings, 20 of which 
were yellow and died very early, and the 3 remaining ones were 
very weak, reaching only a height of 40-60 cm. when they flowered. 
They had the type of the gracilis of the corresponding cross of 
O. Lamarckiana. They were not mentioned in table IX. 
O. canaXO. biennis L.—Among 7o plants of this culture, one- 
half had the type of O. LamarckianaX biennis, and of these 15 have 
flowered. The other half were evidently cana. Of these, 28 had 
the stature of typical O. cana, but with some marks which indi- 
cated an influence of the father. The foliage was less gray, a 
darker green, with broader bracts, and more dense spikes with 
smaller flowers than in the other crosses. The stigmas were sur- 
rounded by the anthers, insuring natural self-fertilization, as in 
O. biennis. Besides these intermediate types there were 7 dwarfs, 
which had the gray, narrow, and pointed foliage of O. cana, and 
which in the table have been calculated together with the high 
specimens of the cana type. 
The reciprocal cross yielded only Jaeta and velutina, together 
57 plants, of which about one-half of each type have flowered. 
O. canaXO. Lamarckiana.—The two types of this culture were 
exactly the same as in the self-fertilized offspring of the mutant. 
There were only 19 specimens, of which 6 were cana, 11 Lamarck- 
zana, and 2 nanella. The dwarfs combined the marks of cana with 
those of nanella and have been calculated in the table with the 
cana specimens of tall stature. 
The same cross had been made in 1907, the seeds being sown 
in 1913. In this case there were 50 offspring, among which 26 
