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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 30 th ; 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 H. 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, e) 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 



