
          of this very species last year, un-named, which I [added: collected] in the Alpine
regions of the White Mts. I have since found it on the highest of
the Green Mts. i Vt. May I ask your opinion in regard to this
interesting lichen? Perhaps you posess P. enteromorpha, a comparison with
which would decide the matter. The primary apothecia (which are very num-
erous commonly) on large, cyathiform, or globlet-or perhaps, hat-shaped
with  a very considerablt concavity. These apothecia have the lower pat so narrowed
as to present frequently a perfect figure of a goblet. In maturing these apoth.
change considerably by the ripening + consequent growth of the disk which splits
the margins; + they then present the appearance of large flat immarginate
sentellae. Altogether it is the most curious Parmelia I have seen: and I should
[added: be] greatly delighted if you would spare a minute to give me your
decision upon it. I shall send [added: it] with a parcel I have just got ready con-
taining a very few plants of trifling moment [?] which I was unable
to get ready before: + as I sent you before a N. Hampshire specimen, I
will now send one of my Vermont plants. Both are identical with that
from Van Diemen's land. I think you will be pleased with its appearance in
a wet state - + it is well worth the trouble.
No 3. Peltigera venosa Hoffm.
26. Usnea florida, var. near var. gamma strigosa!, Ach.
27. Usnea florida, var. near var. B [beta] hirta!, Ach.
25. Cladonia retipora, Spreng. Most beautiful.
24 (b.) Cladonia
18. Cladonia
19. Cladonia
24. Cladonia
20. Cladonia
21 Cladonia
24(a) Cladonia. I cannot distinguish this from No 21.
Hooker quotes Sir J. Smith as saying that "to determine the species among
the cup-bearing lichens is one of the most difficult problems in botany."
This remarks applies I think equally well to the whole genus, whether
of the scyphifornm or subulate-branched Cladoniae. Some of these Van
        