HORTICULTURE. 441 



seedless but certain A-arietiot^ show a dark area iu the flesh when seeds are 

 I>resent. Other varieties are always light-fleshed even when seeds are present. 

 Both dark and light fleshed varieties may occur on the same tree. 



No conclusions have been reached relative to the physiological causes which 

 underlie the changes in color of the flesh. 



Prune growing- in southwestern Washington, O. M. Morris {Washington 

 Sta. Popular Bui. 5T^ (1914), pp. 13, figs. 4)- — 'J^bis is a preliminary report on 

 a survey of the soil and orchard conditions in southwestern Washington in 

 conjunction with a study of the weather records. It discusses the cause of 

 the frequent failure of the prune crop in certain localities and suggests 

 certain changes in orchard management for the improvement of these conditions. 



Summing up the observations thus far made it api)ears that unfavorable 

 weather at a critical time during the blossoming or immediately after, together 

 with a weak condition of the trees, has been the gi'eatest cause of crop failure. 



Orchard notes, J. B. Thompson (Guam Sta. Rpt. 1913, pp. 17-19, pi. 1).— This 

 comprises brief notes on the behavior of a number of fruits and miscellaneous 

 plants being tested at the station grounds. 



The propagation of the "Saipau" mango (Mangifera odorata) on seedling 

 stocks of the ordinary Guam mango (J/, indica) has been readily accomplished 

 by Oliver's system of inarching seedling stocks (E. S. R.. 24. p. 736). In the 

 work at the station inarched plants have flowered within four months from the 

 time of inarching. The results indicate a tendency of this variety to early 

 bearing when inarched. 



The jelly plant Abera gardnerii, introduced from Florida in 1911. has been 

 successfully fruited and seedlings are being grown for distribution. Thus far 

 the results with citrus trees have been un.satisfactory, due, it is believed, to 

 unfavorable soil conditions. The trees have been lost largely from a disease, 

 probably " gum disease," which is prevalent among citrus ti'ees throughout the 

 island. A further introduction of several varieties Avas made during the year. 

 Seedlings of the cherimoya {Annona chcrimola) were found to inarch readily 

 with those of both the bullock's heart {A. reticulata) and the sour-sop (A. 

 iniiricata). A list is given of a number of new fruit and other economic plants 

 that were introduced successfully during the year. 



Small fruits for Colorado, E. P. Sandsten (Colorado Sta Bui. 195 (1914), 

 pp. 3-19, figs. 2). — This bulletin contains cultural directions for growing re<l. 

 purple-cane, and black raspberries, blackberries, dewberries, loganberries, straw- 

 berries, currants, and gooseberries, including information relative to varieties 

 adapted to Colorado and insects and plant diseases. 



State bog report, H. J. Franklin (Ann. Rpt. Cape Cod Cranberry Growers' 

 Assoc., 26 (1913), pp. 17-32, 43-47). — A report on cranberry investigations 

 presented to the Cape Cod Cranberry Growers' Association, August, 1913. The 

 substance of this report is essentially the same as that noted (E. S. R., 30. p. 

 142) with the addition of some preliminary observations for the season of 1913. 



The " little bogs " at Amherst, T. W. Morse (Ann. Rpt. Cape Cod Cranberry 

 Growers'' Assoc., 26 (1913), pp. 6-9). — The first season's results from fertilizer 

 tests on experimental cranberry plats located at Amherst. Mass., are here 

 reported. 



Although no conclusions are thus far drawn relative to a fertilizer for cran- 

 berries, the heaviest yields of fruit were secured where potash predominated. 

 Nitrate and acid phosphate fertilizers had a similar effect upon the yield. 

 Potash gave the least vine growth and nitrate the most. The results as a 



" The popular bulletin entitled Sheep for Washington Farms, issued September 1.3, 1913, 

 •and abstracted (E. S. R., 29, p. 870) as Popular Bulletin 57, is evidently now regarded 

 as Popular Bulletin 58. 



