
604 Report or THE HorticunvuRIst OF THE SS i 
; 5 ey oy 
IV. Hybrid of Bourquiniana and Labrusea. Bee is Ni ae < 
1. Delaware.—Ten clusters bagged. ‘‘ Fully self-fertile, ™ ae vate. 
TOPAL it ices cca elp o's «ea pink Rhea ai sec ORs A ae 
V. Vitis cestivalis.— Typical wild vine transplanted to the rhea % 
Five clusters bagged. ‘‘ Fully self-fertile.” a 
Dota cs ciied sah ese ds co basis wigls olen a easels ety oan an «Fine Relea 
VI. Vitis Doaniana.—Typical wild vine transplanted to the vineyard. = 
Two clusters bagged. ‘‘ Pollen self-irritant.” ‘ oP. 
Of the four varieties purely Zabrusca, three were found to 
be fully self-fertile and the fourth was nearly so. Its Chae ‘ aie 
would commonly be called “loose” but not imperfect. oa St 
Of the eighteen hybrids of Zabrusca and vinifera three were 
fully self-fertile, and these three had long filaments. Whether — 
self-pollination occurred before the blossoms opened was not'noted. —_ 
Another one, though not fully self-fertile still developed a large per 
cent of the ovaries into perfect fruit. It has short filaments. Self- — 
pollination occurs before its blossoms open. ae 
Eleven had pollen self-irritant only, i. e, the ovaries 
started to develop, but soon fell away or persisted as 
abortive fruits. Ten of these have short filaments, and one has 
long filaments. Self-pollination was observed with seven of this 
class. Whether it occurred with the other four can not be stated: 
One proved to have ‘“ pollen impotent,” i. e., the ovaries were not 
incited to any perceptible growth. It has short filaments and self- ae 
pollination occurs before the blossoms open. A 
One hybrid of Labrusca and vinifera. less thay one-half 6 
vinifera, had pollen self-irritant only. It has short filaments. yr sf 
With the eighteen hybrids of Zabrusca and vinifera above — ae 
noted, only those varieties having long filaments can develop — he 
fruit when only self-fertilized, but not all which have long — oe 
filaments can develop fruit when only self-fertilized. .In every ¢ ii, 
instance the vines with short filaments were really pistillate, since — % Ms 
they failed to develop fruit when only self-fertilized. According 
to Munson,* in all species of Vets, wild vines having pistillate 
flowers with short recurved stamens are almost always practically ~ 










* In a personal letter. 
