136 



The Journal of Heredity 



on other fmit trees, where the flowers 

 are borne in ckisters, as is the case with 

 apples, pears and plums. 



NO HELP FROM D. VIRGIXIANA. 



In a very large part of the area in 

 whieh D. Kaki may be grown, the com- 

 mon American persimmon, D. Vir- 

 giniana, is native and very naturally 

 the question may be asked, will not 

 staminate trees of this species serve as 

 pollinizers? This the writer thought 

 possible a few year ago. The evidence 

 at hand so far proves that they are en- 

 tirely worthless for this purpose and 



necessity of i^oUinizers for D. Virginiana 

 has been denied by some writers. 



It follows therefore that to make 

 fruitfulness certain it is a wise plan in 

 all localities to include D. Kaki polliniz- 

 ers in the planting, and with most horti- 

 cultural varieties of D. Kaki, in most 

 sections, it is a provision of fundamental 

 necessity. What \'arieties can be used 

 as pollinizers? 



Quite a number of varieties of D. 

 Kaki are known to produce staminate 

 flowers. The list now known in this 

 country comprises Okame, Taber's No. 

 23, Taber's No. 129, Gailey, Masugata, 



PLANTING PL.\N FOR JAPANESE PERSIMMONS. 



In order that there may be pollinizers wherever wanted, but not else- 

 where, Mr. Hume recommends setting them in the positions indi- 

 cated by small circles in the above diagram, the crosses indicating 

 ordinary female trees. (Figure 19.) 



the proximity of staminate D. Virgini- 

 ana trees has no influence whatever on 

 the fruitfulness of D. Kaki. Moreover 

 out of many hundred hand pollinations 

 between I). Kaki and I). Virginiana us- 

 ing both species as the male ]jarent no 

 viable seed has so far been secured. 

 They appear to be absolutely incom- 

 [)atiblc. It may be i^ointed out in 

 jjassing that evidence is accumulating 

 which shows that the ])resencc of stam- 

 inate D. Virginiana trees is essential to 

 the fruitfulness of pistillate trees of the 

 same species in some localities. The 



Siang (S. P. I. No. 21910) New Sien 

 (S. P. I. No. 22368) and S. P. I. No. 

 27037. All of these have produced 

 staminate in addition to the pistillate 

 flowers, and occasionalh' ])erfect flowers 

 (i.e., those containing both stamens and 

 l)istils) have been found. 



Thus far the most jjainstaking and 

 careful examination of man>' liimdreds 

 of trees, when in l)loom, has failed to 

 reveal the ])rescnce of staminate flowers 

 on varieties Costata, Hachiya, Hya- 

 kimie, Tsuru, Tamopan, Tanenashi, 

 Zengi, Triumi)h, Yemon, Yeddoichi and 



