— 240 — 
aurantiacum were cautiously rubbed against the heads of H. excellens; 
this corymb was only isolated by being in a room where no other 
plant was present. June 30k; the ripe fruits were collected; in 
July they were sown in pots with burnt soil, germinated and were 
planted in pots with better soil; in September they were planted 
out in the Garden, where the young plants grew well during the 
autumn. 
In the beginning of June 1905 the flowering time began. The 
offspring of the corymb (A), both the castrated ones and the isolated 
ones, were all A. excellens — consequently apogamic offspring. 
Some of the flower-heads of this offspring were isolated again in 
July 1905; a few of the harvested fruits were sown, germinated 
very sparingly in September, and the only one which survived the 
winter was planted out in June 1906 (No. 100); other flower-heads, 
opened while under glass-isolation, were fertilized with the hybrid 
H. excellens X aurantiacum (No. 46) mentioned below; the fruits 
were sown, but these also, as all the fruits sown in July 1905, 
germinated very sparingly; the young plants (3) were planted out 
in June 1906, but are all pure H. excellens. I can not give any 
satisfactory explanation of the slight germination of all the fruits 
sown in July of 1905, but I think some mistake of an unknown 
kind must have been made. 
Of the fruits harvested from corymb (B) 26 specimens germinated, 
of which one (No. 46,6) only gave rise to a rosette of leaves 
without flowers, and consequently its character could not be deter- 
mined; neither until now has this specimen flowered. Among the 
25 individuals 20 were pure H. excellens, which are supposed to 
have originated from apogamic fruits; as being of no interest they 
were discarded. The 5 remaining individuals were all with certainty 
hybrids, but were ail different from each other, some coming 
nearer to H. excellens, others to H. aurantiacum; still it is worth 
noticing that the mother, H. excellens, is the more dominant. The 
hybrids coming nearer to H. aurantiacum are hermaphrodite (with 
well developed pollen), the corolla is light orange-red, redest in the 
outer flowers, and the vegetative part of the plants is comparatively 
weak and with slighter power to develop stolons. Two of the 
hybrids were so precocious, that I, being away for some time, did 
not happen to follow their flowering; the one (No. 46,5) was near 
H. aurantiacum and hermaphrodite; its fruits were collected and 
sown, but did not germinate; only few of them appeared to be 
