214 Evans: HeEpatricAE OF PUERTO RIco 
very brief characterization of the leaves and underleaves and would 
apply to almost any species of Prionolejeunea or even to species of 
other genera of the Leyeuneae. Weber’s description of the type- 
locality is also indefinite ; it is given as follows: ad Z7ichom. rig- 
idum ill. Sprengel. observavit, et absque nomine olim communi- 
cavit. Later references to Weber's type-specimens are both vague 
and confusing. Under Lejeunea denticulata Nees, in the Synopsis 
Hepaticarum, the first specimen quoted is from the following locality: 
ad Trichomanes radicans Jamaicae (Spreng. in Hb. Web.); this is 
the only specimen noted from the Weber herbarium and also the 
only one under which reference is made to Sprengel. It was pre- 
sumably determined by Weber himself even if it did not represent 
a part of his type-material. In Stephani’s paper on “‘ Die Gattung 
Leeunea im Herbarium Lindenberg,” two specimens are quoted 
under L. denticulata,* either of which might be a part of Weber's 
type, although no definite statement to this effect is made. The 
first of these is No. 6277, “ad. Zrichom. rigid.” ; the second 1s 
No. 6278, “ Patria? Sprengel.’”’ According to Stephani neither of 
these is the true Z. denticulata as he understands the species: the 
first becomes the type of his new L. angulistipa ; the second is 
sterile and indeterminable, but is also distinct. Whether he studied 
the Jamaican specimen referred to in the Synopsis does not appeat 
from his writings, and there are apparently no later references of 
any sort to Weber’s specimens. The only fact to be learned from 
the evidence just submitted is that /ungermania denticulata was 
probably an aggregate and that it may have included other forms 
than those mentioned by Stephani. Under the circumstances it 
seems wisest to allow the name to disappear from the literature. 
This conclusion is supported by the fact that recent writers have 
applied the name L. denticulata to entirely distinct species. The 
plant described + and distributed by Spruce, for example, is desti- 
tute of subfloral innovations, while in a specimen from Guadeloupe, 
determined by Gottsche and kindly communicated by Stephani, 
innovations are present and the leaves present a different cell-struc- 
ture. The specimens collected by Schwanecke have not been €*- 
amined by the writer. 
eo pesca 
* Hedwigia, 29: 69. 1890. 
t Hep. Amaz. et And. 156. 1884. 
