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(A) Hoffmann and Ihne have published a special list of plants 
' selected by them as a result of many years’ experience in Europe. The 
following calendar, copied from the appeal for “ phenological obser- 
vations,” contained in their “ Beitrage, 1884,” shows the names of 
the plants and the approximate date in Europe of the phenomena 
that they wish to have observed. Corresponding observations in 
America are desirable and should be communicated either to them 
directly or to the journals of botany, climatology, or general science, 
or to the botanist of the Department of Agriculture. 
CALENDAR FOR PHENOLOGICAL OBSERVATIONS. 
Instructions—Plants should be examined daily. The object is to 
obtain for individual stations average data characteristic of the cli- 
mate; therefore plants that are known to be exceptionally early or 
iate, and those that are forced by special treatment, or those that are 
artificially trained on walls are not to be considered. It 1s not neces- 
sary to confine the observations to the same plant year after year, 
but to those individuals that represent the average eonditions of the 
plant in nature. 
For brevity the following notation may be used: 
(P) Pollen disseminated (Pollen effunditur. Linne). 
(1) Leaf, or the first visible surfaces of the leaves, or beginning of 
the leafing out or of the foliage (frondescentia: prima folia expli- 
cantur Linne; erste Blattoberfliche Hoffmann; fevillaison Quetelet). 
(F) Full foliage: All leaves have appeared (folatio perf. Linne; 
allgemeine Blatt Hoffmann). 
(2) Flower, or the first opening of the flower buds (efflorescentia: 
primi flores ostenduntur Linne; erste Blithe offen Hoffmann; florac- 
son Quetelet). 
(3) Ripe fruit (Prima fructus matura; bacce definite colorate 
Linne; erste Frucht reif Hoffmann; maturation des fruits Quetelet). 
(H) Harvest, or first date of cutting cereals (Zirnte Anfang Hoft- 
mann; J/essts initium Linne). 
(4) Leaves color or fall (foliorum pars major decolorata Linne) ; 
allgemeine Laubverfarbung Hoffmann; vollstandige Hntlaubung 
Karl Fritsch; Hffeuillaison, chute des feuilles Quetelet). 
