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close when irriiiitcd. These exiieriim^iits resulted in twelve full ijrowu 

 capsules. July 31st and August 3d eighteen stigmas Avere pollenated from 

 flowers found growing on clay soil, one mile south of the city, which 

 resulted in three mature capsules. August the 14th and 18th, nineteen 

 stigmas were treated with pollen from a vine growing in clay soil one- 

 half square north of my vine, and three mature pods were the result. 

 Ten stigmas Avere pollenated August I'.tth from a vine groAving in clay soil, 

 at the root of a large elm tree, aliout one square northwest of the home 

 vine, and eight mature capsules Avere the result. 



Summarized, the results show that sixty per cent, of the pollenations 

 made Avith pollen from a vine groAving in rich loam were successful; 

 fifteen and sixteen per cent. AA-ere successful when the pollen came from 

 clay soil, and the vines grcAv in the open, under conditions nearly the 

 same as that of my back yard, and eighty per cent, as the result Avhen 

 the pollen came from a vine Avhose roots Avere planted in clay soil and 

 entertAvined Avith those of a big elm. From this it seems that the soil iu 

 AA'hich the A'ine grows, has some influence on the fertilizing power of its 

 pollen. The pollen used ui the 1902 experiments, Avhich resulted in fail- 

 ures, came from vines growing in the open and rooted in clay soil. Th^i 

 idea that pollen coming from the big elm tree vine is in some way pecu- 

 liarly efficacious in producing seed is confirmed by the fact that a vine 

 Avithin one hundred yards of it, and favorably located to encourage hum- 

 ming-birds to visit betAveen the tAvo, has borne an abundant crop of cap- 

 sules for the past two years. 



The only insects noticed on the trumpet-flowers were robbers. Avhose 

 visits Avere without compensating advantages. Black ants and little 

 sweat bees came early and stayed late; the ants to get nectar, and the 

 bees to collect pollen. Sometimes they found an entrance between the 

 lobes of the corolla limn before the flower Avas open. The bees invade short 

 work of collecting all the pollen in sight— half of it going within fifteen 

 minutes. When the pollen was knocked down into the tube they did not 

 seem to be in any Avay put out, but Avent on collecting until all Avas gone. 

 As many as six bees Avere seen together in a corolla, very busy, croAvding 

 and fighting for place. Had they found any pollen on a stigma they 

 Avould have taken it. During a drouth conical holes Avere found in the 

 calyx, of many floAvers. that reached doAvn to the ovarj', and as mud- 

 dauber wasps, fipJicf/idc. AA-ere seen about the holes they were charged AA'ith 

 making them. After rain came they disappeared, and may have done the 



