HOW PLANTS ARE SCATTERED Sy: 
out long, leafless runners which root at intervals and so 
propagate the plant, carrying the younger individuals off 
to a considerable distance from the parent plant. 
Living branches may drop freely from the tree and then 
take root and grow, after having been blown or been car- 
ried by a brook or river to a favorable spot, perhaps hun- 
dreds of yards away. The so-called snap-willows lose 
many live twigs under conditions suit- @ 
able for starting new trees. 
A slightly different mode of dis- 
persal from that of 
the raspberry is one je noe 
in which buds sepa- kVA 
i ime Ab y KL3 iG 
rate from the plant =" Ss ibis : 
NAKA Wek iets 
gate it. Inthe blad- Wo Iw 
derwort (Fig. 264), 
at the close of the Fic. 264.— A Free Branch and Two Buds of 
Bladderwort. 
growing season, the 
terminal buds are released by the decay of the stem and 
sink to the bottom of the water in which the plants live, 
there to remain dormant until spring. Then each bud 
starts into life and gives rise to a new individual. 
444, Dispersal of Seed-Plants by Bulblets. — Almost 
every farmer’s boy knows what “onion-sets” are. ‘These 
are little bulbs, produced at the top of a naked flower- 
stalk or scape by some kinds of onions which do not 
usually flower or bear seed. ‘Tiger-lilies produce some- 
what similar bulblets in the axils of the leaves, and there 
is a large number of species, scattered among numerous 
families of plants, all characterized by the habit of producing 
