6;5 



to grow. When this structure is fully grown the ovary usually 

 has a similar structure to that described for 0. Lmdlieimeri and 

 in addition is surmounted by this butt of a hollow style. 



Perhaps the most peculiar abnormality of all, more rarely met 

 with, is that in which the tissues of the joint simulate portions 

 of the fruit. A {^\n joints of the cochineal pear [Nopalea cochi- 

 iiilliferd) were found the past season wherein a portion of the 

 base of several joints had turned to the color of the fruit. Ex- 

 amination showed that the texture as well as the flavor was 

 exactly that of the rind of the mature fruit. There were no fruits 

 produced by any of these joints. The abnormal red portion was 

 a little swollen and more prominent than the remainder, but 

 further than this, there was no abnormahty except that the vas- 

 cular system for some reason was slightly knotted. It is not at 

 all uncommon to find joints or portions of joints of O. Klciniae or 

 0. Icptocaulis simulating their fruits in color. The red coloration 

 in these species may occur at the proximal, distal or central por- 

 tion or may take in the entire joint. A change in the tissue also 

 accompanies the change of color but these joints often become 

 incorporated as a permanent part of the plant body. It is not 

 at all uncommon to find portions of the joints of 0. /acvis, and 

 other Platyopuntias, adjacent to the fruits becoming somewhat 

 changed when the latter ripens. Sometimes the tissues imme- 

 diately surrounding the vascular bundles entering the fruits may 

 simulate the color of the fruit for an inch below the areole while 

 at other times the whole areolar region is colored red. 



Washington, D. C. 



CRATAEGUS OF DUTCHESS COUNTY, NEW YORK* 



l^.Y W. W. Eggleston 



With but little time for exploring in 1905, I had two things in 

 mind in regard to my Crataegus problem. The first was to know 

 the form in the field which Dr. Britton had considered nearest 

 Crataegus coccinea L., and the second to cover as much unexplored 

 territory north of the city as possible. 



* Read before the Torrey Botanical Club, February 28, 1906. 



