104 . 
and the extra-axillary flower bud of that season, but at the time 
examined only a twenty-fifth of an inch long. . 
In some of my previously published notes I have mentioned 
similar facts in regard to part of the species cited above, and also 
other additional varieties. In the January number of the Botan- 
ical Gazette of 1883, “The Hibernaculum of Asarum Cana- 
dense”’ was described. A paper on “The Hibernacula of 
Herbs ” was published in the November number of the American 
Naturalist, of 1883. In this paper Asarum Canadense, Arisema 
triphyllum, and Sanguinaria Canadensis, were described. In 
addition to these, the early appearance of flower buds in other 
spring plants, so far not mentioned in the present article, were 
noted. Anemone Hepatica, Jeffersonia diphylla, Diclytra Cucul- 
laria, Claytonia Virginica, Uvularia grandiflora, Trillium sessile 
and Symplocarpus fetidus. Most of these observations were 
unfortunately made as late as the middle of winter, extending 
into March, and therefore do not have the value of those taken 
this year in August and September, but judging from the strong- 
ly developed character of the flower buds of these plants when 
examined, I should judge that their initial stage could be de- 
tected much earlier. In the March number of the BULLE- 
TIN for 1884, in ‘ The. Development of Dodacatheon Meadta,” 
the early development of the flower buds of that plant is 
described. An article entitled ‘‘Some Morphological Notes 
on Caulophyllum thalictrotdes,” in the July number of the BUL- 
LETIN for 1887, gives some general views on the questions 
here involved, and is, I hope, substantiated by the additional facts 
now cited. “The Development of Symplocarpus fetidus,” in 
the June number of the BULLETIN for 1888, gives a fuller de- 
scription of the curious method of development and arrange- 
ment of the flower buds of that plant. 
’ The total number of species investigated by me therefore is 
twenty-eight. All of these possess the same peculiarity of start- 
ing the formation of their flower buds during the summer of the 
previous year, and often attaining considerable development 
before the retarding influences of winter become effective. No 
doubt the warmer sunny days of winter permit still further 
growth, so that when spring has actually come, the increased 
warmth causes these flower buds to complete their developm ent 
