_Stereodon Brid. Bryolog. II. 550._ Theca inaequalis, peristomii
interioris ciliis imperforatis.
8. HYPNUM SPINIFORME, caule erecto subsimplici, foliis subbifariam
confertis lineari-subulatis serrato-denticulatis, nervo excurrente,
pedunculo subbasilari, thecae ovato-arcuatae operculo obliquo
conico-rostrato.
Hypnum spiniforme _Linn. Sp._ 1587. _Hedw. musc. frond. III._ 59.
_t._ 25. _Spec. musc. p._ 236. _Schwägr. suppl. I._ 2. _p._ 184.
Hypnum, (Stereodon) spiniformis _Brid. Bryolog. II._ 557.