1886.] MICKOSCOPICAL JOURNAL. 147 



f. End lobe much narrower than the basal, end convex . oscitans^ ii6. 

 f, '^ '^ " " end deeply emarginate, 



foUacea^ ii8. 



g. Basal lobes furcate (with lobules), (/). 

 g. " not furcate (_/'). 



h. End lobe convex, without prominences latlceps^ 115. 



h. *■' truncate, with 2 small prominences ..... recta^ ii2. 



h. " retuse, basal lobe furcate B alley i^ 118. 



/. " with 2 slender, transverse, bidentate projections, 



quad rata ^ 117. 

 /. " without projections, convex ; sinuses broadly rounded, 



KltcheUll^ 116. 

 I. End lobe without projections, concave ; neck short; sinuses acutish, 



Rabenhorstll^ iiS. 

 /. " •'• " " neck long; basal lobes curved 



upward simplex.* 



j. Basal lobes horizontal, not curved plnnatljida., 116. 



j. " curved upward, narrow, 



expansa. 117; arcuata, 117; simplex.* 

 k. Basal and lateral lobes deeply furcate (with lobules) . furcata., iii. 

 k. "• '' " shallowly furcate, 



Criix-Melltensls., hi j stiperjiua.\ 



k. " '' '' not furcate psetidoftircata^ iii. 



/. Lobules deeply furcate ; borders not serrate . . . . dlchotoma., iii. 



/. " not furcate, borders not serrate rlngeus., 112. 



/. " " borders serrate serridata.* 



m. End lobe remote from the lateral {n) . 

 m. End lobe not remote from the lateral {o) . 



n. End lobe triangular triangularis, 115. 



n. '' not triangular hatnata, 114. 



o. Lobes closely approximate, radiating (/). 



0. " " " not radiating, end lobe truncate, 



trimcata, 114: 



p. End lobe triangular . . triangularis, 115. 



p. "■ cuneate, end concave conferta, 114. 



p. '• very broad, end truncate or convex crenata, 113. 



r. Cytioderm papillose . aplculata, no. 



r. " not papillose (j). 



s. Basal lobes with 4 subdivisions, lateral with 8 ; apices of end lobe furcate, 



rotata, fimbrlata, 109. 

 s. " " " " " apices of end lobe not 



furcate coruuta. 



s. Basal lobes with 2 subdivisions, lateral with 4 {u) . 



s. Basal and lateral lobes with the same number of subdivisions {v) . 



t. End lobe with i row of pearly granules .... AIlnnesotensls.-\ 



t. " without pearly granules (_)')• 



u. End lobe exserted on a long neck hrachyptera, no. 



u. " without long neck, its apices furcate . . . simplex, iio. 



V. Margins spinous brachyptera, no. 



V. "• not spinous blsplnata.-\ 



y. .Sinuses deep, inwardly widened and rounded; subdivisions of semi-cell 

 20-40 radlosa, 109. 



• Bulletin Torrey Botanical Club, Dec, 1885. + Journ. R. Micr. Soc, Dec, 1885. 



