10 
I 
The Introduction of Extra-limilal Plants — To what degree is our 
flora influenced by designed introduction of extra-limital plants? A 
person in no Avay a botanist, though after his fashion a lover of the 
woods, confessed to me that he was in the habit during his rambles 
of scattering seeds of foreign or western plants here in Rhode Island. 
Now, if these germinated, as no doubt they often did, they would 
give rise to plants quite extra-regional. This, when it first was 
noticed, might cause the experienced student no great annoyance, 
but it is easy to see that after a while, and when well established, 
they might easily mislead. There is no way that I can^ suggest of 
stopping such a custom in our free country. The question is how 
far is it reprehensible? 
W. W. Bailey. 
■ 
LeavesoftheAbietinese.— Botanists will be glad to avail them- 
selves of the opportunity to study the structure of the leaves of the 
Abieiinecz oi the United States and judge for themselves as to the 
value of the specific characters afforded by the position of the resin- 
ducts and the number and nature of the hypodermic cells; and I 
therefore take pleasure in announcing that Mr. J. D. King, of Cottage 
City, Mass., has prepared from material furnished from the collec- 
tions of the Harvard Arboretum, and now offers for sale, beautifully 
mounted sets of microscopic slides showing cross-sections of the 
leaves of the sixty species of the United States. 
C. S. Sargent, 
■ 
Corema.— I find in Rev. J. Fowler's list of New Brunswick plants, 
Corema Conradii " abundant in sphagnous bog in rear of Carleton, 
N. B." 
W. W. Bailev. 
■ 
Shortia.— A correspondent, referring to the note on Shortia in 
the December Bulletin, suggests that Mr. Hyams would have come 
nearer the truth had he said the plant '' is sold out " instead of ''dytf^g 
out," in view of the fact that he has for the last few years been adver- 
tizing to supply specimens at ten dollars each. 
James F. Robinson, a well-known collector, at one time Secre- 
tary of the Botanical Exchange Club, and more lately connected 
with Oivf^nc Cr\W^rxa. ■^Tor^^^^ ^^*- A\^A ^.^If^ cii/M*in1vT nn the iSt Ot 
Providence institutions. 
W. W 
Botanical Notes- 
Nectar 'Glands of the Cruci/erce, — M. J 
paper of fifty-six pages {BulL de la Soc. Tcheque des Sciences, 6, xu.^ 
1884), has drawn attention to the characters of the nectarifero 
glands in the Crucifer^, which he believes might be employed 1 
characterizing some genera and even larger groups. Thus the 
