OF ARTS AND SCIENCES. 279 



lato-subulatis superne argute serratis minute quadrato-areolatis, cellulis 

 alaribus amplis ventricosis fusco-purpureis, costa dorso versus apicem 

 lamellosa, lamellis serratis ; capsula gibboso-ovali in pedicello sicco 

 erecta, humido decurvo-cygneo demissa ; operculo aciculari ; calyptra 

 dimidiata basi fimbriata. — Grows in dense tufts on the ground. — Not 

 unlike large forms of C jlexuosus, but the margins of its leaf and the 

 lamellfE on the back of the costa are serrulate. 



40. C. TENUissiMUS (sp. nov.) : laxe ca3spitans parce purpureo- 

 tomentosus ; caule tenuissimo flexuoso-erecto 4 - 5-ies innovando-con- 

 tinuo, innovationibus inferne appresso-foliosis veluti nudis ; foliis co- 

 malibus paucis subverticillatis horizontalibus longissime setaceis apice 

 dentatis, angulis baseos maxime dilatatis e cellulis magnis ventri- 

 cosis purpureis constructis, areolatione alibi minuta subquadrata viri- 

 descente ; archegoniis normalibus ; capsula desiderata. — On decayed 

 logs in dense forests, — A very slender species 1-2 inches long, 

 remarkable for the subverticillate comal leaves on the successive 

 innovations, which give the plant somewhat the aspect of a minute 

 Char a or Galium. 



Gen. HOLOMITRIUM, Brid. 



41. H. CRisruLUM, Mont. ; Schwcegr. Suppl. t. 309. — Logs and 

 bushes in thick woods. 



42. H. Wrightii {sp. tiov.) : dioicum ? robustum innovando-ramo- 

 sum ; foliis confertis horizontali-recurvis elongato- vel lineari-oblongis 

 latiusculis acuminatis canaliculato-concavis vel subcomplicatis apice 

 grosse irregulariter dentatis, cellulis oblongis apicem versus ellipticis 

 chlorophyllosis, costa percurrente, perichajtialibus longissime vaginan- 

 tibus subito longe subulatis ; capsula elongato-ovato-cylindracea ; oper- 

 culo 6 basi conica subulirostro ; calyptra lineari dimidiata. — On trees 

 in dense woods. — A dark -green species resembling Jl. crispulum, 

 Hornsch., which, however, has cauline leaves suddenly acuminate from 

 a broad obovate base : in the present species the leaves are of a uni- 

 form width throughout, except at the point. 



Gen. LEUCOBRYUM, Hampe. 



43. L. TENUIFOLIDM {sp. nov.), L. suhulato {Hampe) simillimum sed 

 foliis latioribus brevioribus inferne multo angustius marginatis differt. 

 — On decayed logs in thick woods. — Specimens without capsules. 



44. L. RonusTUM (sp. nov.) : a L. longifoUo, cui proximum, statura 



