PROPAGATION OF TREES AND SHRUBS 21 



Such cuttings responded to treatment witli indoleacetic acid (200 mg./l., 

 24 hr.), 50 percent of them rooting in sand-peat in 2>7 days (87). 



Foiitancsia Fortunei is easily propagated by softwood cuttings. Taken here 

 in mid-July, they rooted 100 percent in sand in 8 weeks without treat- 

 ment. Sandy soil may also be used (80). Late June cuttings rooted 53 

 percent in 3 weeks after treatment with indolebutyric acid (5 mg./l., 24 

 hr.), less well with greater concentrations (57).- 



Forsythia, golden bell. The species are easily propagated by hardwood and 

 softwood cuttings. Untreated cuttings of F. ititeniicdia (14) and F. viridis- 

 sima (66) rooted 100 percent when taken in July; also very well, in sand, when 

 taken from May through September (44). Rooting of late June cuttings was 

 hastened by treatment with indolebutyric acid, F. suspensa responding to 50 

 mg./l., 6 hr. (83) and F. intermedia to 5 mg./l, 24 hr. (57). 



Fothergilla. Cuttings are considered difficult to root {73), but July cut- 

 tings of F. Gardeni rooted 100 percent in sand-peat in 42 days after treat- 

 ment with indoleacetic acid (200 mg./l., 24 hr.), 67 percent without it (87). 

 Untreated softwood cuttings of F. monticola which were taken here in spring, 

 when the shrubs were in flower, failed to root in sand but rooted 67 percent 

 in sandy soil in 60 days. 



Franklinia alatamaha (Gordonia) is not difficult to propagate by late sum- 

 mer or fall cuttings. August cuttings rooted 83 percent in sand in 29 

 days after treatment with indolebutyric acid (30 mg./l., 24 hr.), equally- 

 well but more slowly without treatment (125). Cuttings which were 

 taken here in early November rooted 93 percent in 64 days after treat- 

 ment with indolebutyric acid (50 mg./l., 24 hr.), 67 percent without it; 

 and these November cuttings proceeded to make more top growth than 

 did cuttings taken in August. 



Gardenia. Cuttings respond to treatment with indolebutyric acid (40 mg./l., 

 24 hr. or 2 mg./gm. talc) (61) but sometimes the only effect is to hasten 

 rooting. Untreated cuttings which were taken here in late November, 

 from greenhouse plants, rooted equally well, 94 to 100 percent in 40 days, 

 in sand, sand-peat, or sandy soil and the only benefit of treatment was 

 to hasten rooting by about a week. April cuttings rooted 88 percent in 

 53 days after treatment with indolebutyric acid, 56 percent without it (16). 

 While cuttings taken about December 1 were rooting 57 percent without 

 treatment, there was more than 80 percent rooting of cuttings which had 

 been treated with Rootone or Hormodin (120). 



Genista. Summer cuttings of most species root well in sandy soil (7, 105). 

 Some of them may also be taken in fall. Untireated cuttings of G. pilosa 

 rooted at least 90 percent in sand when taken here in September and 

 October, less well if taken in December. 



Ginkgo biloba, maidenhair-tree. Softwood, July, cuttings root fairly read- 

 ily (45). Such cuttings rooted 90 percent in sand in 36 days after treat- 

 ment with indolebutyric acid (50 mg./l., 24 hr.), but untreated cuttings 

 rooted almost as well (125). 



Halesia, silverbell-tree. Cuttings of H. Carolina and H. monticola which 

 were taken here in mid-July rooted 80 percent in sandy soil in 6 weeks 

 after treatment with indolebutj^ric acid (25 mg./l., 20 hr.), not more 

 than 40 percent without treatment; and decidedly less well in sand, 

 whether treated or not (27). Cuttings have also rooted well in sand-peat 

 (87) and better in peat moss than in sand (66). 



