— 241 
full fruits. Of the other hybrid (No. 46,1), which I did not see 
when flowering, the fruits were collected, but among 805 only 59 were 
apparently full and have given three plants, which probably will flower 
next year (No. 141). Another hybrid (No. 46,4) is hermaphrodite 
and not very far off H. aurantiacum, but still with more of 77. excellens ; 
it is also better in its vegetative parts; it is painted in the 
Plate as fig. 5. It flowered again in September, when the drawing 
was painted, and some of its heads were isolated, others castrated ; 
unfortunately it did not survive the winter. Of the fruits from 
castrated heads of it 82 were empty, 68 apparently full (No. 144); 
of them from isolated heads 318 were empty, 160 apparently full 
(No. 143). They were sown in the spring of 1906 and have ger- 
minated to some extent (38 plants). Two hybrids are nearer to 
H. excellens; they have copious stolons and are vigorous in all 
vegetative parts as well as in rich-flowered corymbs. The flowers 
are female as in H. excellens, from which they differ in a orange- 
red stripe on the under-side of the corollas of the outer flowers, 
and in the darker hairiness of the involucres and the stalks. The 
one of these two (No. 46,3) has given fruits after isolation; they 
were sown, and have germinated in September 1905 (No. 107), 
but only a single plant has come from them. The last hybrid 
(No. 46, 2) is very near to A. excellens and is perhaps only a pure 
H. excellens; not-isolated fruits germinated in 1905 and were planted 
out in 1906 (No. 142). — At present only the following primary 
hybrids are alive: 1° a hybrid certainly, but near excellens, (No. 46,3), 
2° a plant which is so near excellens, that it is doubtful if any 
hybridisation has taken place (No. 46, 2), and 3° a plant which 
hitherto has not flowered (No. 46, 6). 
Series IV (H. excellens x aurantiacum). 
A specimen of H. excellens, planted in a pot, was placed in 
a cold-house. June 16t* 1904; after removing the opened flower- 
heads some buds were castrated. June 17; two heads, opened 
to day, were fertilized with AH. aurantiacum taken from a lawn in 
the Garden near the Observatory (No. 48). Harvest, sowing and 
planting as in the foregoing Series III. The offspring of the castrated 
heads was of course typical H. excellens (No. 47), of which a single 
plant is kept alive. Among the plants, growing from the cross, 
only one was not a pure H. extellens. This hybrid (No. 48 a) is 
a very robust plant with strong stolons, large radical leaves and 
tall and many-flowered corymbs. The heads are a little larger 
16 
