TY  - JOUR
T1  - Preliminary Statement on the Prothalli of Ophioglossum pendulum (L.), Helminthostachys zeylanica (Hook), and Psilotum, sp
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 68
SP  - 405
EP  - 409
PY  - 1901/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1901.0068
M3  - doi:10.1098/rspl.1901.0068
AU  - Lang, W.
ER  -