20 MASS. EXPERIMENT STATION BULLETIN 382 



January, cuttings of one species developed more roots per cutting after 

 treatment with naphthaleneacetic acid (60 mg./l., 24 hr.) and there was 

 similar, although less response to indolebutyric acid (48). 



Dorycnium hirsutwii. Taken here in September and October, untreated 

 cuttings rooted 100 percent in sand in 3 months. 



Elacagnus. Cuttings of E. pungeius rooted 72 percent without treatment, 

 100 percent in sand if treated with indolebutyric acid (30 mg./l., 4 hr.) 

 and taken in October; less well if taken earlier or later (125). January 

 cuttings rooted 30 percent without treatment, 75 percent after treatment 

 with indolebutyric acid (40 mg./l., 6 lir.) (119). The species are also 

 propagated by softer wood, summer cuttings made with a heel (80). 



Enkianthus. Untreated softwood cuttings of E. campanulatus and E. peru- 

 latus rooted 80 percent or more when taken here in late May. Cuttings of 

 the former taken here in early June rooted 100 percent in 6 weeks after 

 treatment with indolebutyric acid (50 mg./l., 20 hr.), 83 percent in 10 

 weeks without treatment. Sand-peat is a better rooting medium than 

 sand (44). 



Epigaea repens, mayflower. August or September cuttings, made to include 

 the current year's growth and, at the base, some of that of the previous 

 year, rooted in high percentages in sand-peat, peat, sphagnum, or their 

 native soil, and in higher percentages than did cuttings taken in spring (6). 

 Untreated cuttings which were taken here in late August rooted 94 per- 

 cent in sand-peat in about 5 weeks. Treatment is unnecessary, but the 

 rooting of October cuttings was hastened by naphthaleneacetic acid 

 (50 mg./l., 24 hr.) (114). 



Erica, heath. Summer cuttings root readily in a sandy, peaty soil (105) or 

 in sand-peat. Untreated cuttings of cross-leafed heath rooted 93 percent in 

 8 weeks when taken here in late June, less well when taken in August. Root- 

 ing is sometimes improved or hastened by indolebutyric acid (40 mg./l., 24 

 hr. or 12 mg./gm. talc) (61). July cuttings of E. darlcyensis rooted 100 per- 

 cent in 4 weeks with treatment, 77 percent without it (88). 



Eiwnymus, spindle-tree. Softwood, summer, cuttings of evergreen species 

 usually root readily, more readily than those of the deciduous species (7), 

 and cuttings of both may be taken later and rooted in sand. Untreated cut- 

 tings of E. japonica which were taken here in October rooted 100 percent. 

 October cuttings of E. kiautschovica (125) also rooted well. Hardwood cut- 

 tings of winged spindle-tree which were taken here in early April and im- 

 mediately set in the field rooted 100 percent in 4 months whether or 

 not they were treated. November and March cuttings of that species and of 

 E. latifolia also rooted well (29). Rooting of cuttings of several species was 

 hastened by treatment with indolebutyric acid (16, 49, 83, 125), concentra- 

 tions to which there was a response being as follows : European spindle- 

 tree (August), 100 mg./l., 24 hr. ; E. japonica (September), 60 mg./l., 24 hr. ; 

 strawberry-bush, winged spindle-tree, and E. kiaiitschoznca 5 to 10 mg./l., 24 

 hr. ; E. Fortunei, 1 to 5 mg./gm. talc 



Exochorda, pearl bush. Softwood, June or July, cuttings will root although 

 not very well (7,105). July cuttings of E. raccmosa rooted 40 percent in 

 sphagnum peat, not at all in sand (66). 



Fagiis, beech. Cuttings do not root at all readily O'i), but European beech 

 has been propagated by softwood cuttings taken in early summer when 

 tlie last one or two leaves on the twig were beginning to develop (42, 67). 



