CHE REFERENCE LIBRARY - Pole Shift Survival Information

398 THE NURSERY-MANtJAL
Platanus (Plane-Tree. Buttonwood. Sycamore, improperly).
1’lcltarlncl~cP.
I’sually prop,,& 41 mated by seeds, sown in spring, slightly covered with
earth and kept moist and shaded, but layers, ripe-wood cuttings
and greenwood cuttings under glass in ,June taken with a heel may
be employed. I7arieties may be h vafted in spring on seedlings
of one of the species.
Platycerium ( Stag’+Horn Fern). T’r,l,q~0cl~iaCtW.
Propagation ehiefly~ by division ; sometimes by spores. See Fcn2.s.
Platychis. Owh idnc'rw.
I’ropagatcYl IQ FicIcA-growths from the old pseudobulbs. When
no nnttrr;iI I)retlk occurs, the plants may often be induced to break
1)~. slightly twisting, or notchin, (F the rhizome with a sharp knife.
See Orchids, page 32.
Platycodon, \YahIcnI~crgia. C’n,,lz~nnulu~r?cr.
Propagatd 1,) sc~ls, and old plaints I,y division in spring if care
is taken wit]: tllr flev from fresh well-ripened seeds. The pits or
stones should I)e remo\*ed from the pulp tind then stratified until
spring. If thcb>* are allowed to freeze-•, tllc b germination will be more
uniform, a5 tltc pits will be more easil). optn:vI I)y thcl swelling
enibr~*o. Plum pits are rarely cracked 1))~ hand. The strong-growing
species and \*arietic5, cspeciaII~* southwarrls, will give stocks strong
enough to iburl thrh first season ,- but the we&r ones must stand
untii the nest season after the seccls ;tre planted. In all tile northern
states, howe\*tT, I)lum pits arc’ usually sown in seetl-be&, in t,hc
SlffllC way as apple and pcxr scvYls. The set-bcllings arc’ taken up in
the fall, and tlie following sprin, (7.
wt out in nurser)’ rows, wlierc~ they
arc” !miidtvI in :‘itigrr?;t.
1’1uii15 are c~stensi\x~I,~ r, vown from suc’liers, which spring in great
numbers frorr~ the roots of man>’ species. In France tllis method of
propaga.tion 1. ‘s Iargely used. $0 long as graftagc does not intervene,