VIBURNUM 



cymes; calyx with 5 minute teeth ; corolla rotate or 

 campanulate, rarely tubular; stamens 5: ovary usually 

 1-loculed: fr. a drupe with a one-seeded, usually com- 

 pressed stone. In several species the marginal fis. of 

 the cymes are sterile and radiant; such are I", macro- 

 cephahnn, fomentosum, Opultis, Sunjruti and n I i fo- 

 lium, and of the three first named garden forms are 

 known with all fls. sterile and enlarged. 



ALFRED REHDER. 



VIBURNUM 



1923 



2661. Viburnum Sieboldi (X %). 



The familiar Snowball of delightful memory seems to 

 be doomed. It is too much trouble to try to keep off the 

 aphids. Fortunately its place can be taken by a Japa- 

 nese species that is even more satisfactory. Fig. 2663. 

 The berries of the Japanese species, V. tomentosum, are 

 a brilliant scarlet, changing to black. The foliage of this 

 Snowball is also remarkably beautiful. The leaves are 

 olive-green with brownish purple or bronzy margins, 

 and their plicate character makes them very distinct 

 and attractive. The bush is entirely free from insect 

 pests. The single and double forms of the Japanese 

 species differ in the same way that is shown in Figs. 

 2664 and 2666. Unfortunately they have been confused 

 in many nurseries, and only the trained eye can tell 

 them apart in the nursery row. The double or Snow- 

 ball type is, of course, the one destined to the greater 

 popularity, though the single form is a shrub of great 

 value, especially for large estates and parks. The dou- 

 ble form is known to nurseries as Viburnum plicatum, 

 but its proper name is V. tomentosum, var. plir<itnm. 

 While it is hardy in New England, it is not a shrub that 

 can be transplanted as easily as many other species. 

 Hence it should be transplanted every second year in 

 the nursery until it is sold. The double form may be 

 propagated by cuttings of half-ripened wood in close 

 frames, or by layers, which in some soils would better 

 remain two years. French nurserymen propagate it by 

 layering. The layers seem to suffer from winter and, 

 to be on the safe side, it is best to cover them well with 

 moss or leaves when the ground is somewhat frozen, so, 

 that the frost may be kept in until spring. The cluste 

 are about as big as oranges and pure white. They face 

 in great demand for Decoration Day in New York. , 



The single form, unlike the double, is easily trans- 

 planted. It is also readily propagated by layers or cut- 

 tings. Both kinds are hardy in the North arid make 

 compact bushes 6-8 ft. high. 



J. W. ADAMS and W. M. 



A. Lvs. penninerved, not lobed. 

 B. Cymes paniculate, broadly 



pyramidal or semi-globose. 

 c. Foliage deciduous .......... 1. Sieboldi 



cc. Foliage evergreen. 



D. Corolla with cylindrical 



tube .................... '2. Sandankwa 



DD. Corolla rotate-campanu- 



late .................... ::. odoratissimum 



BB. Cymes umbel-like, flat (ex- 

 cept in the Siiotrball forms. 

 See Nos. 12, 16, 8.) 

 C. Secondary ve ins cnr ring and 

 anastomosing before reach- 

 ing the margin: margin 

 entire or finely serrate. 

 D. Foliage persistent, entire. 

 K. Branches and Irs. gla- 

 brous or slightly pu- 

 bescent ............... 4. 



EE. Branches and Irs. hir- 



5. 



DD. Foliage decidtuntx. 



E. Branches and Ivs^ gla- 

 brous or ferriiyin- 

 eously scurfy, 

 v. Lvs. entire or slightly 



undulate-dentate. 

 G. Cymes sessile: Ivs. 



small 6. 



GO. Cymes peduncled... 7. 

 8. 



FF. Lvs. finely and 

 sharply serrate : 

 cymes sessile, sub- 

 tended by the upper 

 leaves. 



G. Petioles mostly with 

 wavy, rather broad 



margin 9. 



GG. Petioles without or 



irifh narrow, not 



irnry margin. 



H. Winters-buds and 



petioles rusty- 



l>i<h<'xcint 10. 



HH. Winter-buds and 

 petioles not 

 rusty-pubescent.!!. 

 KK. Branches and Ivs. stel- 

 late pubescent: winter- 



fniils naked 12. 



cc. Secondary veins prominent, 

 ending in the points of the 

 teeth. 



D, Winter-buds naked: I vs. 

 a- Hh usually numerous 

 small teeth. 



Tinas 

 rigidam 



obovatum 



nudum 

 cassinoides 



Lentago 



rufidulum 



prunifolium 



macroccphalum 



