56 THE PLANT WORLD. 



yet placed in species sheets, whether for hick of time, or because they 

 have not been satisfactorily identilied. In the lower left-hand corner, 

 the name of the genus should be written and the same place on the 

 species cover should contain the name of the species. 



It is customary to place several genus covers at the end of the 

 genus, in which to place foreign material. When the collections are 

 large it is difficult to distinguish between these plain covers, therefore 

 various color-schemes for makinjj the task efisier have been suofgested. 

 The Field Columbian Museum uses colored manila covers for its 

 foreign specimens, l)ut the trouble of ol)taining and keeping in stock a 

 supply of the colors needed may prevent many from adopting this 

 scheme. A less expensive method, which gives e(|ually good results, 

 is to have a number of slips 3 by 4 inches in size cut from thin paper 

 of the desired color. These may be pasted to the lower left-hand 

 corner. of the ordinary genus cover, and has the advantage over entire- 

 colored covers, in that the color can be changed at will by painting a 

 second slip over the first. 



If colors are used to mark the different counti-ies, they should be 

 used in the order following. For North America, plain manila; South 

 America, red; Europe, blue; Asia, orange; Africa, green; Australia 

 and Polynesia, yellow. 



In conclusion it may be said that an herbarium made after the 

 directions herein given will continue to increase in value with age, and 

 instead of being thrown away as so much rubbish when the owner is 

 done with it, will find many others glad to preserve it. 



ABNORMAL FORMS OF DOGWOOD. 

 By E. W. Berry. 



Dogwood seems to reach the acme of profusion only every second 

 year. In the spring of '96 we saw lots of it and in the fall of 

 that year the woods burned with the hues of its many tinted leaves 

 and scarlet berries. During 1897 we had dogwood, of course, but not 

 so plentifully, and the scarlet of its fall dress was lost in the many other 

 autumnal tints. In 1898 even 1896 was surpassed, the woods were 

 snow-white in patches; often tinted, not pink as is usual, but splashed 

 and blotched with crimson. Many flowers measured five inches across 

 their bead. 



