published Lieferungen (209, 210) of Engler-Prantl he gives a 

 very full synopsis of all the species of the genus known to him, 

 recognizing in what had formerly made up the single species 

 Sclaginella rupestris no less than thirty-six species ! Surely our 

 good critic from Boston will have his hands full in reducing all 

 these to varieties or forms, and in reminding us that they did not 

 do this in the good old days before descriptive botany really 

 touched upon specific characters. 



In order further to bring the views of Dr. Hieronymus to the 

 notice of our students, I feel that no better service can be ren- 

 dered than to present the following synopsis of his species so far 

 as he briefly tabulates them in Engler-Prantl, reserving to a later 

 article my own annotations on some of his species, some of which 

 I had refrained from publishing myself for lack of sufficient ma- 

 terial. It will be noticed that he accepts all species published by 

 me as valid as well as Mr. A. A. Eaton's 5. cinerascens, which he 

 properly restores, as tliere is an earlier published S. bryoides. 



Synopsis of the North American Selaginellae according to 

 Hieronymus. 



Plants erect or ascending, emitting roots only in the lower 

 part ; leaves elongate-triangular, always pointed with 

 terminal bristles. 



Strobiles horizontal or at least not erect; microspores 

 and macrospores dorsiventrally distributed. 



Leaves without a hairy margin 



S. tortilpila A. Br. (Carolina) 



Leaves with 8-14 marginal hairs on either side 



S. rupincola Underw. (New Mexico) 



Strobiles erect; microsporangia in axils of upper 

 sporophylls; macrosporangia in the axils of the 

 lower terminal leaf-bristles 0.25-0.45 mm. in length. . 



S. Bigelovii Underw. (California) 



Terminal leaf-bristles 0.45-0.8 mm. long. 



Leaves with 30 or sometimes 50 marginal hairs on 



either side S. Chrismari Hieron. (Mexico) 



Leaves with 8-16 marginal hairs on either side.... 



S. arEnicola Underw. (Florida) 



Plants creeping or forming prostrate spreading masses. 

 Plants creeping or often with thickly crowded climbing 

 branches ; branching stems, mostly not over 10 cm. 

 long: leaves linear-elongate, diminishing toward 

 the blunt ends. 

 Leaves without bristles at the ends or merely with short 

 tips. 



