i88 



MOSSES WITH A HAND-LENS 



FIG. 5. 



FIG. 6. 



Archegonium, the flask-shaped female reproductive 

 organ. (Fig. 5.) See, also, antherosoid. 



Arcuate (capsule), bent in a curve like a bow. 

 (Fig. 6.) 



Ar eolation, the net work formed by the outlines of 

 the cells of a leaf. 



Astomous (capsule), without a mouth. Used of 

 capsules which have no regularly dehiscent lid. 



Auricles, small lobes at the basal angles of the leaf, 

 usually consisting of cells differing from those 

 of the main part of the leaf in size or shape or 

 both. (Fig. 3 and Fig. 2, a.) Properly used only 

 when there is an outward curve in the outline 

 of the leaf at the base, as in the figures, but often used 

 loosely to denote the basal angles of 

 widely decurrent leaves. 



Autoicous or autoe clous, having male 

 and female organs on the same plant. 

 According to Braithwaite, there are 

 three forms. 



i. Cladautoicous, with the male 

 organs on a special proper branch. 



2. Gonioautoicous, with the male organs in 

 a bud-like cluster, and axillary on a female branch. 



3. Rhizautoicous, male branch very short and cohering to 

 the female by the rhizoids. 



Axil, the angle at the base of a leaf between it and the stem. 



Basal or basilar cells, cells at the base or in- 

 sertion of the leaf, often of different shape and 

 color from those of the main part of the leaf. 



Beak, prolonged narrow tip of the operculum. 

 The opercula in Figs. 6 and 8 are strongly beaked. 

 Bicostate, having a double costa, which is usually 

 much shorter than in leaves having a single costa. 

 Bifarious, growing in two ranks. 



Bifid, cleft into two divisions like the amphigastria of 

 Chiloscyphus or the teeth of Dicranum. 

 Bi-sexual, synoicous. 



Bordered, having a margin different from the rest of the 

 leaf. In Mnium and Bryum (which see), the border consists of 

 a few rows of greatly elongated cells, often in two or more layers. 



FIG. 7. 



FIG. 8. 



