26 MASS. EXPERIMENT STATION BULLETIN 382 



made of half-ripe young shoots (80), but they do not ordinarily root very 

 well (51). 



Liquidambar. Cuttings of L. formosana, L. oricntalis (105), and sweet gum 

 (42) will root in sand if taken in summer and made of half-ripened wood 

 with a heel. 



Liriodendron Tulipife\ra, tulip-tree. Propagation by cuttings has been con- 

 sidered impractical (105), but there was 52 percent rooting of untreated 

 July cuttings made with the basal cut a half inch below a node (14). 

 Rooting of summer cuttings, in sand-peat, was hastened by treatment with 

 indoleacetic acid in a relatively high concentration (87). 



Lonicera, honeysuckle. Softwood, summer, cuttings of many species root 

 well in sand (44, 105) or sandy soil (7), and hardwood cuttings are also 

 used with good results. Untreated hardwood cuttings of L. Morrowii 

 rooted well when taken in April (13). Cuttings of L. pileata and L. 

 nitida, without treatment, rooted 100 percent in sandy soil in about 8 weeks 

 when taken here in December. Hardwood, early spring, cuttings of L. 

 coerulea (65) and Tatarian honeysuckle (40, 65) responded to treatment with 

 indoleacetic acid 50 mg./l., 48 hours for the former, 24 hours for the latter. 

 Rooting of November cuttings of L. Korolkozvii was more improved by that 

 acid (100 mg./l., 24 hr.) than by indolebutyric acid (83) but very dilute 

 S'olutions of the latter are effective with softwood cuttings. July cuttings of 

 L. nitida rooted 100 percent in 14 days after treatment with indolebutyric acid 

 5 mg./l., 24 hr. (57) and that treatment was followed by good rooting of 

 softwood, spring, cuttings of L. Maackii in 16 days (48). July cuttings of 

 L. fragrantissima rooted so well without treatment that treatments were of 

 no significant advantage (104), but the rooting of Tune cuttings of that 

 species was hastened by indolebutyric acid (10 mg./l., 24 hr.) (57). 



Lycium, box-thorn. Untreated softwood, summer, cuttings of Chinese mat- 

 rimony-vine and L. ruthcnicimi root readily (42). Hardwood cuttings also 

 root well. Taken here in late March, buried in sand in a cold cellar for 3 

 weeks and then planted in the field, cuttings of L. rtithetiicum rooted 100 per- 

 cent in 9 weeks with or without treatment. 



Madura pomifera, osage orange, can be propagated by softwood cuttings, 

 the basal cut a half inch below a node (14). July cuttings rooted 100 per- 

 cent in sand-peat in 42 days after treatment with indoleacetic acid (100 

 mg./l., 24 hr.), 32 percent without treatment (87). 



Magnolia. These have not been considered easy to propagate by cuttings 

 {72)). Cuttings are made of soft wood, taken in summer (63, 67, 105, 124). 

 Sand is a good rooting medium (63, 87, 105) — better, at least for some species, 

 than sand-peat (14) and better, at least for M. Soiilangcana (27), than sandy 

 soil. A small heel is considered desirable (63). Untreated cuttings may 

 root slowly (124) or not in large percentages and treatments are worth while. 

 Cuttings of M. Soulangcana which were taken here in late June rooted 100 

 percent in 35 days after treatment with indolebutyric acid (50 mg./l. , 22 hr.), 

 32 percent without it. This treatment also improved the rooting of early 

 July cuttings of M. stcUata. August cuttings of M. liliiiora rooted 1(X) per- 

 cent in 49 days after that treatment, 21 percent without it, and rooting of June 

 cuttings of M. Kobus was improved by similar treatment with 80 mg./l. (125). 

 Malus, apple. Softwood cuttings of some species and varieties will root if 

 they are taken in late spring or early summer and if they are more than usually 

 well protected against wilting (42). Taken here in late June, cuttings of 

 M. atrosanguinea rooted 57 percent in sand-peat without treatment ; and cut- 



