12 ON CALIFORNIAN MOSSES. 



characters of his species agree well with Mliller's description, and also with our specimens. 

 It is remarkable enough by its granular areolation (arcolis reticuli minutissimis Hook.), 

 its whitish or nearly pellucid nerve (nervo pallido stepe sub pcllucido Hook.), the long 

 Vr :dehtate flexuous acumen of the leaves (folia ramea omnia longe acuminata quandoque 

 pilo flcxuoso terminata Hook.), its short, rough, red pedicel (seta uncialis rubra tubercu- 

 losa Hook.) &c. Mr. Hooker even mentions the split teeth of the internal peristome re- 

 sembling that of a B a r t r a m i a, and the general resemblance of the moss in some points 

 with Hypnum abietinum. Miiller's description of H y p n u m ramulosum 

 agrees perfectly and in every point with our specimens. On shaded rocks near the Paper 

 Mill, Marin County. 



65. HYPNUM (RHYNCOSTEGIUM) rusciforme Weis. 

 Spring in a canon near San Francisco. 



66. HYPNUM (THAMNIUM) B i g e 1 o w i i Sul 



On the bark of trees and on the ground. Very variable in size. 



67. HYPNUM (EURYNCHIUM) Stockesii Bryol. Eur. 

 On the ground in the shade. Common. 



68. HYPNUM (EURYNCHIUM) Whippleanum Sul. Bot. of the Ex. 



Specimens of this species found mixed with Fissidens limbatus in Mr. Bolan- 

 der's collection, show that the pedicel is sometimes smooth. On shady ground near San 

 Francisco. 



69. HYPNUM (EURYNCHIUM) Oreganum Sul. 



On shaded old logs in a creek, Marin County. 



70. HYPNUM (IsOTHECiuxi) B re werian urn Spec. nov. Ilypno rayosuroidi peraffine differt : colorc 

 sordide-luteo viridi, caospitibus densioribus, ramis crassioribus, subjulaccis, raro clougatis filiformibus ; foliis arctc iui- 

 bricatis apprcssis, versus basim latioribus, superne subito in acuruine brevi contractis, valde concavis vix denticu- 

 latis. Perichactialibus longius lanoeolato subulatis refiexis ; capsula cylindrica breviorc rufa. 



This species could be considered as Hypnum stoloniferum Hook., but that 

 this last species has, according to Hooker, drooping capsules and plants of a larger size. 

 Hooker's plant was collected by Menzies on the roots of trees, even pending from branches. 

 Ours, according to Mr. Bolander's remarks, grows on granite rocks near Mission Dolores. 

 It was also collected by Professor Brewer of the Californian State Geological Survey, and 

 is dedicated to him. 



71. HYPNUM (BRACHYTHECIUM) Bolanderi Spec. nov. Dioicum laxe lateque caespitosum pallide amcene 

 viride. Caule diverse ramoso, raniis elongatis flexuosis, vel suberectis rigidis sub piiinatim vage ramosis; Foliis 

 undique imbricatrs apertis, ovato-lanceolatis brevitcr aouminatis margine piano undique serrulatis, nervo ultra 



