Muscineen. 269' 



strongly tuperculate with more or less distinct supplementary ridges. 



Fi~ull. Brütoniae Evans, n. sp. 

 Lobule infiated tbroughout, nnderleaves entire or unidentate on 

 the sides. 



Perianth with one or more distinct roughened supplementary ridges 

 both antically and postically, Frull. Virginica Gottscbe, 



Periantb smooth and witbout distinct supplementary ridges. 



Frull. Eboracemis Gottsche.- 

 Vorstebende Arten werden nicbt nur sehr genau und ausführlich beschrieben, 

 sondern auch auf Taf. I — IX abgebildet. 



Subgenus Homotropantha ist nur durch Frull. plana Sulliv., Mem. Amer. 

 Acad., new. ser. IV, p. 175 (1849) vertreten, von welcher nicht nur 

 eine genaue Beschreibung, sondern auch auf Taf, IX, in Fig. 12 — 21, 

 eine Abbildung gegeben wird. 



Zu Subgenus Thiopsiella giebt Verf. nachstehenden Schlüssel : 

 Unterleaves reflexed, at least toward the apex. 



Lobes acuminate or acuti underleaves not erispate at base ; bracts 

 subentire ; innermost bracteole connate on both sides. 



Frull. Niaquallensis Sulliv. 

 Lobes t^ute or obtuse; underleaves strongly erispate atbase; bracts 

 more or less dentate ; innermost bracteole free. 



Frull. Tamarisci Dum. 

 Lobes obtuse or rounded; underleaves not erispate at base; bracts 

 entire or slightly dentate ; innermost bracteole usually free. 



Frull. Asagrayana Mont,. 

 Underleaves plane or nearly so. 



Lobes marked with a distinct line of discolored cells; underleaves 

 entire on the sides, sometimes auriculate at base; Stylus a con- 

 spicous disc-like process; Stylus of lobule of bract a distinct segment. 



Frull. Asagrayana Mont. 

 Lobes marked wirth a distinet line of discolored cells; underleaves 

 often unidentate on the sedes, never auriculate at base; Stylus 

 small or minute ; Stylus of lobule of bracts not distinet, replaced 

 by a Cluster of fine laciuiae or cilia. Frull. Franciscana Howe. 



Lobes with or without scattered discolored cells; underleaves entire 

 on the sides ; Stylus minute, Stylus of lobule of bract a distinct 

 segment. Frull. Californica (Aust.) Evans. 



Die Arten des Subgenus Thiopsiella werden ebenfalls beschrieben und auf 

 Taf. X— XIII abg'^bildet. 



Vom Subgenus Diastoloba endlich wird folgender Schlüssel aregeben : 



Bracts and bracteoles (at least those of the innermost row) strikingly 

 dentate or spinöse. 



Lobes of leaves marked by a line of discolored cei!s ; lobules of 

 bracts with a distinct segment or Stylus on inner edge. 



Irull. Selwyniana Pearson. 

 Lobes of leaves without discolored cells ; Stylus of bracts not distinct. 



Frull. Donellii Aust, 

 Bracts and bracteoles entire or nearly so, 

 Lobles of leaves parallel with the stem. 



Frull. Kunzei Lehm, et Lindenb. 

 Lobules of leaves widely spreading from the stem. 



Frull. Caroliniana Sulliv. 



Auch die Species des Subgenus Diastoloba werden beschrieben und auf 

 Taf. XIII — XV abgebildet. Als unvollständig bekannt sind zum Schluss der 

 Arbeit erwähnt: 



Frull. Chilcootiensis Steph., Engler's botan. Jahrb., VIIL p. 98 (1886) 

 aus Alaska und Frull. Wrighlii Aust,, Bull. Torrey Botan.-Club, III, p. 15 

 (1892) aus New-Mexico. Eine Figurenerklärung von p. 36—39 bildet den Be- 

 schlu3s der sehr verdienstvollen Arbeit, 



Warnstorf (Neuruppin). 



