;268 Muscineen. 



Ä. foUicolutn Berk. auf Ulmus, Celtis, Smüax. 

 A. viridulum B. und C, auf Blättern von Pirus communis^ 

 Jflicoria, Quercus. 



A. corrugatum Ell. auf Umhellularia californica. 

 A. fultum Harkn. auf Eucalyptus. 

 A. album Peck. auf Aralia racemosa. 



Ludwig (Greiz.) 



Evans, A. W., Revision of the North American species 

 of FruUania, a genus of Hepaticae. (From Transactions of 

 the Connecticut Academy. Vol. X. Maj 1897. 39 pp. With 

 15 lith. pl.) 



Nach einleitenden Bemerkungen über die Charaktere der 

 •Gattung FruUania giebt Verf. zunächst folgenden Schlüssel zu den 

 Subgenera: 



Lobule iuflated in the upper part only, connected with the lobe by a 



long fold subparaliel with the stem; inflorescence paroicous ; perianth trapezoidal 



in section. 1. Subgenus Chonanthella Spruce. 



Lobule inflated throughout its whole latent or nearly so, connected with 



the lobe by a short fold approximately at right angles to the stem. 



Lobule about as broad as long. 



Underleaves not cordate at base; perianth thypically triangulär or 

 trapezoidal in Section, usually with tubercles or supplementary ridges 

 or both. 2. Subgenus Trachycolea Spruce. 



Underleaves cordate at base ; perianth siniply trigonous and smooth. 



.^. Subgenus Ho7notro2)antha Spruce. 

 Lobulue decidedly longer than broad ; perianth simply trigonous and smooth. 

 Inflorescence dioicous ; perianth terminal trigonous and smooth. 



4. Subgenus ThiopsieUa Spruce. 

 Inflorescence autoicous; perianth terminal on the stem or a main 

 brauch. 5. Subgenus Diastoloba Spruce. 



Das Subgenus Chonanthella ist in Nordamerika nur durch FruUania ane- 

 tina Tayl. (Synopp, Hep. p. 413) vertreten, welche ausführlich beschrieben und 

 auf Taf. I. durch Fig. 1—6 abgebildet wird. 



Zu Subgenus Trachycolea wird folgende Uebersicht gegeben : 

 Autoicous. 



Lobule more than half the size of the lobe Frull. Oakesiana Aust. 

 Lobule less than half the size of the lobe, often explanate. 



Perianth truncate and abruptly narrowed into a short beak : bracte- 

 oles free trom the bracts. Frull. inflata Gottsche. 



Perianth not truncate, gradually narrowed into a stört beak; bracte- 

 oles connate on one side with bracts. Frull. Catalinae Evans n. sp. 

 Dioicous. 



Lobes not cordate at base; leaf-cells in middle of lobe with incon- 

 spicuous trigones and uo intermediate thickenings ; branches often 

 terminating in upright, leafless flageila with squarrose underleaves. 



Fi-ull. Bolanderi Aust. 

 Lobes cordate or auriculate at base; leaf-cells in middle of lobe with 

 conspicuous trigones and occasional or frequeiit intermediate thicke- 

 nings; branches not terminating in leafless flageila. 



Leaves strongly squarrose when meist. Frull. squarrosa Dum. 



Leaves scarcely or not at all squarrosa when meist. 

 Lobule usually explanate. Frull. riparia Hampe. 



Lobule usually inflated. 



Lobule inflated in upper and outer parts, compressed below; under- 

 leaves dentate or crenate on the sides above the middle ; perianth 



