284 Howe: Notes on AMERICAN HEPATICAE 
II. TELARANEA 
TELARANEA Spruce, Trans. and Proc. Bot. Soc. [Edinb.] 15: 
365. 1885. [As a synonym.] Schiffn.; Engl. & Prantl, Nat. 
Pflanzenfam. 1°: 103. 1895. 
The genus Zé/aranea has points of contact with Lepidosia, 
Blepharostoma, and Arachniopsis, and if generic rank is denied to 
it, might be incorporated with any one of the three with almost 
equal justice. To the Micrv-Lepidozia section of the genus Lepr 
dozia its affinity is perhaps especially close, yet, according to Pre 
vailing conceptions of genera among the Hepaticae, it seems @ 
rather violent proceeding to include it in a generic group the his- 
torical type of which is /ungermannia reptans L. Telaranea di 
verges from Lefidozia in its delicate, filmy, conferva-like habit and 
in the division of the leaves very nearly or quite to the base, the 
segments being never more highly connate than through half the 
altitude of the basal cell and usually for a considerably less dis- 
tance ; the leaf-segments are capillary, of a single row of cells 
unless at the very base, the place of the basal cell being often 0“ 
cupied by a pair of cells side by side. From Blepharosioma, Tel- 
aranca is probably best distinguished by the disparity in size betwee! 
leaves and underleaves and by the more pinnate branching. bs 
archegonia, though usually borne on short postical branches as 19 
Lepidozia and Cephalozia, are sometimes terminal on the main stem 
or lateral branches as in Blepharostoma. 
In its filmy habit and delicacy of structure Ze/aranea is SUS” 
gestive of Arachniopsis Spruce, but the latter genus represents 4 
still further departure along the same lines from the Lepidoza 
type. In Arachniopsis the branches are all postical in origin, the 
underleaves are entirely wanting or are now and then to be recog: 
nized only in a most rudimentary form, and the leaves never have 
more than two segments which are wholly free at the base an 
consist of a single series of cells throughout. 
The species and varieties to be arranged under the genus ae 
so far as we know them, as follows: 
1. Telaranea nematodes (Gottsche) 
= : sht- 
Jungermannia nematodes Gottsche, Hepaticae Cubenses Wrigh 
janae. 
