438 REPORT OF THE CONFERENCE ON GENETICS. 
HYBRIDS AND HYBRIDISATION AMONG BULBOUS 
PLANTS. 
By C. G. vAN TUBERGEN, Junr., of Haarlem, Holland. 
Or the exceedingly numerous varieties of bulbous plants now grown in 
Holland and elsewhere in such amazing numbers, all, with very few 
exceptions, owe their original existence to having been raised from seed. 
It appears however that, with the exception of the modern raisers of the 
Daffodil, very few attempts indeed have been made by the general 
cultivators to do any artificial crossing, or, if any such has been done, to 
keep a record of it. Whether rightly or not, to me it has always 
appeared that however beautiful an artificially raised hybrid plant may 
be, it loses a part of its interest if the parents are unknown. The 
following is an enumeration of some of the hybrids among bulbous and 
tuberous rooted plants which have been raised in our nurseries, with 
brief notes of anything that struck me as being worth noticing : 
Linium.—Very numerous crosses among various species have been 
effected, and many seedlings are still under observation ; a good and note- 
Fie. 118.—Linium x Mar-Han (L. Hansont g x L. Marracon arpum Q). 
worthy race has sprung from the crossing of Liliwn Martagon album 
with L. Hansoni. It is of particular interest to note that whereas D. 
Martagon album, if raised from seed, almost always comes perfectly true, 
