The other species which 
been included in the sibirica^group 
are L^BulleyanaTrom Western China, wt \ ic \*£. however are 
origin, since it does not breed true from seed. Its parents, however^ 
unknown and there is no suggestion as to the speci group is I. 
given rise to it. The Himalayan representative or i n s g p The 
Clarkei, but it is distinguished from all others by its solid 
