No. II.] THE BRYOPIIYTES OF CONNECTICUT. 43 



New Milford, Evans. Hartford: Windsor, Evans. Tolland: 

 Bolton, Nichols. Windham : Canterbury, Mrs. Hadley. 

 Fairfield: Sherman, Evans. New Haven: Branford, Hall; 

 East Haven, Harger; New Haven (1856), Eaton; Orange, 

 Evans; Oxford, Harger; Woodbridge, O. D. Allen. 



Greenland to Alaska, south to Florida and the West Indies ; 

 Europe; Asia. 



Ref. Eaton, 15, 69. Evans, 28, 170. Underwood, 75, 69. 



ORDER JUNGERMANNIALES 

 FAMILY METZGERIACE^ 



1. Gametophyte a thallus with no indication of leaves; 



capsule splitting longitudinally at maturity into four 



valves 2 



Gametophyte more or less clearly differentiated into stem 



and leaves 5 



2. Thallus composed of parenchyma throughout 3 



Thallus with a median strand of narrow elongated cells 4 



3. , Branches lateral: capsule oval Riccardia 



Branching produced by forking; capsule spherical. .. .Pellia 



4. Thallus repeatedly forking, bearing cilia on the margin; 



antheridia and archegonia borne on short ventral 



branches Metzgeria 



♦ Thallus simple or with scattered ventral branches, margin 

 entire; antheridia and archegonia borne on dorsal 

 surface Pallavicinia 



5. Leaves in the form of marginal crenulate scallops; 



rhizoids colorless; capsule splitting longitudinally at 



maturity into four valves Blasia 



Leaves distinct; rhizoids purple; capsule splitting ir- 

 regularly at maturity Fossombronia 



Riccardia S. F. Gray 



1. Thallus mostly 4-10 mm. broad, sparingly branched R. pinguis 

 Thallus mostly 1-2 mm. broad, copiously branched 2 



2. Thallus pinnate or bipinnate 3 



Thallus palmate or irregularly branched 4 



3. Ultimate branches distinctly bordered by 2 or 3 rows of 



cells R. multifida 



Ultimate branches indistinctly bordered by one row of 

 cells R. sinuata 



