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LOPHOLEJEUNEA MUELLERIANA IN FLORIDA. 
Alexander W. Evans. 
Several months ago Mr. Severin Rapp, of Sanford, Florida, had the kind- 
ness to send me a package of Hepaticae for determination, all collected in 
the vicinity of his home. Among them were two specimens of a Lopho- 
lejeunea (3 and 14), which should apparently be referred to L. Mueller- 
iana (Gottsche) Schiffn. , a species new to the United States. L. 
Muelleriana was originally described from material collected in Mexico and 
is now also known from several of the West Indian Islands and from South 
America, so that the extension of its range into Florida is by no means sur- 
prising. Both of Mr. Rapp’s specimens grew on the bark of trees. 
So far as their vegetative organs are concerned the plants from Florida 
agree closely with the specimens from Porto Rico which I have recently 
described and figured. 1 The perianth, however, shows a greater develop- 
ment of paraphyllia or laciniae on the surface and indicates that this organ 
exhibits an even wider range of variability than had been supposed. In my 
description of the perianth the surface (leaving out of consideration the 
laciniae along the four sharp keels) is said to be smooth except for the occa- 
sional presence of a few scattered paraphyllia on the postical aspect, the 
implication being that such paraphyllia are frequently absent altogether. 
In the specimens from Sanford the paraphyllia are apparently always pres- 
ent and occur on both surfaces. Those on the antical surface tend to be 
arranged in a median longitudinal row, perhaps marking the position of a 
rudimentary antical keel. Those on the postical surface show a similar 
tendency to be arranged in three longitudinal rows, one lying between the 
two angles of the postical keel and the two others in the strongly flattened 
portions of the perianth between the postical and lateral keels. On some 
perianths one or two of these rows may be very indistinct or absent alto- 
gether, and there are often a few scattered paraphyllia on each surface in 
addition to those in rows. The presence of antical paraphyllia had not been 
suspected from the study of Porto Rican specimens of L. Muelleriana , and 
I find upon examining them again that the antical surface of the perianth is 
perfectly smooth in the majority of cases. Occasionally, however, one or 
two paraphyllia may be detected in this position. In the Brazilian speci- 
mens distributed by Spruce the paraphyllia are better developed and some- 
times form as distinct an antical row as in the specimens from Florida. In 
accordance with these new observations the description of the surface of the 
perianth should be emended as follows: antical surface sometimes bearing 
an interrupted median row of paraphyllia similar to the laciniae of the 
keels ; postical surface sometimes bearing from one to three similar rows of 
paraphyllia ; both surfaces otherwise smooth except for the occasional pres- 
ence of a few scattered paraphyllia. In the Sanford specimens the lobules of 
the perichaetial bracts are distinct and usually acute or apiculateat the apex, 
a condition which is only occasionally to be observed in material from tropi- 
cal America. 
1 Bull. Torrey Club 34 : 27 . pi. 4, f. 1-8. 1907. 
