44 Illinois State Laboratory of Natural History. 



XIII. TARGIONIA MICH. 



Carpocephalum wanting, the involucre being sessile be- 

 neath the apex of the thallus, bivalved, 1-fruited. Inner invo- 

 lucre wanting. Calyptra thin, persistent. Style deciduous. 

 Capsule short pedicelled. Spores globose, tuberculate. Elaters 

 bi-trispiral. Androecium lateral, disciform, papillose, rising on 

 a separate innovation from the ventral costa. Thallus furcate 

 and continuous from the apex, conspicuously porose, squamu- 

 lose beneath. 



1. T. hypophylla L. Thallus 0.41.3 cm. long, obcu- 

 neate-linear or obovate, rigid, costate, involute when dry, with 

 more or less conspicuous whitish pores above, dark purple be- 

 neath; scales densely imbricate, 2-horned or caudate, the upper 

 ones extending to the margin of the thallus. (T. Miclelii 

 Corda. ) 



Hab. -Cal. (Bolander}. 



BibSjn. Hep. p. 574; Hep. Europ. p. 162. 



Exsic. Hep. Bor.-Amer. No. 137. 



ORDER III. ANTHOCEROTACE^E LINDB. 



Terrestrial, annual plants with thallose vegetation. Cap- 

 sule dorsal, pod-like, mostly erect and bivalved, usually with 

 stomata in its outer wall, tapering into a pedicel or often sessile 

 with a bulbous base. Columella filiform. Involucre tubular, 

 the inner wanting. Calyptra rupturing early near the base, 

 carried up on the apex of the capsule, crowned with a subsessile 

 stigma. Spores flattish, more or less convexo-prismatic, papil- 

 lose or smooth. Elaters with or without fibres. Texture flac- 

 cid, more or less vesiculose; epidermis and pores wanting. 



I. ANTHOCEROS L. 



Monoecious or sometimes dioecious. Involucre tubular. 

 Capsule linear or cylindric-oblong, bivalved. Spores papillose 

 or smooth, colored. Elaters simple or branched, often genicu- 

 late, more or less heteromorphous, the fibres wanting or indis- 



