38 NEW YORK STATE MUSEUM 



15 decay commenced " 46 



On the 15th, the observations ceased. 



It will be seen that No. i continued to increase in size for ten 

 clays or to the nth when its circumference was 43.75 inches. The 

 total increments amount to 33.75 inches. This gives an average 

 daily increase of 3.37 inches. Number 2 continued to increase 

 eleven days when its circumference was 46 inches and the total incre- 

 ments amount to* 40 inches. This gives an average daily increase 

 of 3.63 inches. It remained stationary three days and then began 

 to decay. Number i being larger at the commencement of the 

 observations, it is fair to conclude that it started about one day 

 before No. 2. This gives them both at least eleven days in which 

 to make their full developm.ent. We may therefore conclude that 

 the average time of the development of these puff balls is about 

 eleven days and that their average daily rate of increase in circum- 

 ference is about 3.5 inches or a little more than one inch in diameter. 

 The average time of growth appears to be eleven or twelve days 

 or possibly twelve to fourteen days according to the length of time 

 these two had been above ground before they were first seen. 



Centaurea nigra radiata DC. 

 Homer, Cortland co. August. C. M. Crouse and Mrs L. L. 

 Goodrich. An introduced plant. 



Cichorium intybus L. 



A white flowered form sometimes occurs. Menands. August. 



Convolvulus arvensis L. 



Washington park, Albany. July. S. H. Burnham. A form grow- 

 ing on lawns with leaves oblong and only 1-2 lines broad, the lobes 

 at the base very narrow and divergent. 



Corallorrhiza trifida Chatelain 

 North Elba. June. This delicate little coral root is becoming 

 very rare in our State. Its early blooming time, May and June, 

 at once distinguishes it from our other small species. 



