195 
The special vernation of the different Species is as follows: . 
In B. stmpLex both portions of the bud are straight, the fertile 
frond being enclosed within the folding sides of the sterile. The 
common stalk is the shortest portion of the whole bud and usually 
much less developed than in the other small species. The apex of 
the sterile frond is never curved, or bent over, but. is always erect. 
Figure 3. 
The doubts which have so long obscured this species are being 
gradually removed, and it will soon be universally recognized as a 
good species. Heretofore the German authors alone appear to have 
fully understood its true character, and it has long ‘been placed by 
them on an independent basis. But, through the frequency of later dis- 
coveries, it is now becoming more familiar to our own botanists, and 
the time will come when it will cease to be a stranger to any 
herbarium. The species has been described at length by Milde in 
his Monograph on the Botrychiums, and figured by him in all of its 
forms in Nova Acta. Vol. XXVI. (1858) and more recently in my 
own paper published by Mr. Robinson, (1877). : 
In B. Lunaria the apex of the sterile frond in the bud is always 
inclined, or bent over the nearly erect. fertile frond in. a hood-like 
manner. The common stalk is usually more strongly developed 
than it is in B. simplex, but not so prominently as in &. matri- 
cariaefolium, and the segments of the sterile frond are arranged very 
nearly perpendicularly. Figure 4. - Looe Se. 
This species continues rare within the limits of the Unites States, 
but the Syracuse specimens described in the Torrey BULLETIN for 
October, 1877, suggest the probability of its occurring more fre- 
quently than is generally supposed, and that some forms of it may 
have been confused heretofore with other species... 
In B. BoREALE the apex only of the sterile frond is bent over 
inside (in B. Lunaria it is bent over on the outside) of the upper 
segments. The nearly erect fertile frond comes. up between the 
lowest pair of sterile segments with its apex outside of but inclined 
toward the apex of the sterile frond. The segments of the sterile 
frond are arranged on an angle that exactly indicates its deltoid 
form in the living plant. (This may be understood better by re- 
ferring to Emerton’s figure, he having emphasized this point for me 
by a dotted line a, 4, through the upper portion of the bud.) "Figure 
5. Inconsequence of this arrangement, the lower part of that portion 
of the bud composed of the two fronds bulges out and appears much 
broader than the common stalk. : : 
I have not been able to obtain sufficient data to justify me in 
speaking of this species with any degree of confidence. The two 
specimens from Sweden in the “ Davenport Herb,’’ Mass. Hor. Soc., 
are the only ones that I have seen, and only one of these contained 
abud. Reasoning, however, from analogy, it appears safe to assume 
that the figure given fairly represents the prevailing form of the bud 
in this: species. ae ea ane 
Milde does not give any special description or figure of the bud 
in this species, his only allusion to it being in his introductory chap- 
ter on vernation, where he speaks of a similarity. in. the vernation of 
