4: VERMONT MOSSES. 



ABBREVIATIONS. 



^— Mrs. E. G. Britton. 



Bl—Hv. E. Blanchard. 



F — Edwin Faxon and C. E. Faxon. 



Fr—C. C. Frost. 



G—K. J. Grout. 



P—C G. Pringle. 



MOSSES INSERTED ON THE AUTHORITY OF C. C. FROST 'S 

 COLLECTION WITHOUT EXAMINATION. 



Ditrichum pallidum. Thelia asprella. 



Barbula fallax brevifolia. Thelia hirtella. 



Barbula convoluta. Homalothecium subcapillatum. 



Grimmia Olneyi. Rhynchostegiuni serrulatuni. 



Grimmia Doniana sudetica. Hypnuni cuspidatum. 



Mnium rostratum. Hypnum moUuscum. 



Mnium hornum. Heterocladium squarrulosum. 



Leptodon trichomitrion. Physcomitrium pyriforme. 



KEY TO THE GENERA. 



I. — Leaves composed of large hyaline cells with intervening rows of small chlorophyllose. 

 cells.* Sphagnum. 



Leaves with cells all alike except variations in shape and size. 2. 



2. — Fruit terminating the axis of stem, or becoming apparently lateral through being 

 pushed aside by a new shoot. MUSCI ACROCARPI. 



Fruit lateral, not terminating the axis of stem. MUSCI PLEUROCARPl. 



(See p. 22 for key to Musci Pleurocarpi.) 



MUSCI ACROCARPI. 



3. — Capsule opening by 4-6 valves connivent at the summit. Andreaea. 



Capsule without operculum, opening by irregular transverse ruptures. (Phascum and 

 Bruchia which belong here have been reported from Vermont by Frost, but no 

 specimens have been found in his collection. 



Capsule with a deciduous operculum. 4. 



4. — Stem none or very short; peristome consisting of a membrane. 5, 



Stem distinct; peristome none or formed of separate teeth. 6. 



* Vide also Leucobryum. 



