164 KANSAS ACADEMY OF SCIENCE. 



ORDER III. — Archidiaceae. 

 Capsule bursting irregularly: spores few and very large. Genus 



single X Archidium Hallii Aust. 51 



ORDER lY.— Bryaceae. 

 Capsule bursting irregularly (spores numerous) or generally de- 

 hiscing by a deciduous operculum: in the latter case usually 

 furnished with a peristome. Leaves not sphagnoid. Genera 

 numerous, and as follow : 



I. CLEISTOCAEPI. — Capsule without a deciduous operculum. 



A. Green protonema persistent. 

 Leaves ecostate. 



Capsule colorless x Micromitrium, .37 



Capsule colored x Ephemerum, .37 



Leaves costate x Ephemerum, 37 



B. Green i^rotonema not persistent. 

 Margins of leaves flat or incurved. 



Leaves linear-lanceolate to subulate or abruptly pointed. 



Capsule cucullate x Pleuridium, 43 



Margins of leaves more or less re volute. 

 Capsule short-pointed. 



Calyptra mitrate x Microbryum, 4.5 



Calyptra cucullate x Phascum, 41 



II. STEGOCARPI. — Capsule with a deciduous operculum. 



A. AcROCABPi. Flowers and fruit terminating the stem, either the main shoot 

 or a branch. 



1. Mouth of caps vile naked. 



* Leaf-cells isodiametric, at least above the middle of the leaf, often ob- 



scure. 



Lid imperfectly formed, persistent x Astomum, 51 



Lid perfect, deciduous. 

 Capsule immersed. 



Leaves lamellose x Pharomitrium, 100 



Leaves not lamellose, ciliate : x Hedwigia, 152 



Leaves with a hyaline hair-point x Grimmia, 134 



Capsule exserted, not ribbed when dry. Lid conic, beaked. 

 Pedicel long - * Gymnostomum, 52 



* * Leaf cells plainly elongated, distinct. 



Lid small, convex or short-conic; capsule microstome. 



Leaves subulate-dentate x Bartramia, 53 



Leaves broad, entire; calyptra inclosing capsule Pyramidula, 196 



Lid large (rarely small); capsule macrostome. 



Capsule dehiscing regularly above the middle, not covered 



by the calyptra * Physcomitrium, 196 



2. Mouth of capsule furnished with a peristome. 



* Peristome single. 



I Teeth articulate. 

 X Teeth eight. 



