— IO — 



Marginal hairs as long as 0.16 mm 



. .. .S. mutica D. C. Eaton (Colorado, New Mexico) 



Marginal hairs scarcely 0.08 mm. long 



S. cinerascens* A. A. Eaton (California) 



Leaves with terminal bristle tips. 



Bristles yellowish-green ; leaves with 4-9 hairs on 



either side S. Watsoni Underw. (California) 



Bristles white or whitish. 



Macrospores smooth or nearly so. 



Leaves with 6-9 marginal hairs on each side 



S. Montaniensis Hieron. (Montana) 



Leaves with 9-15 marginal hairs on each side 



S. Schmidtii Hieron. (Alaska) 



Macrospores with amastomosing thickened ridges 

 forming a distinct net work. (Besides the five 

 American species of this group, it contains also 

 vS\ longipila Hieron., from the Himalayas and S* 

 Siberica (Milde) Hieron, from Siberia). 

 With 2-6 marginal hairs on each side of the leaf ; 

 terminal bristles 0.6-0.95 mm. long; strobiles 

 0.5-2 cm. long. .S. Engelmannii Hieron. (Colorado) 

 With 6-8 marginal hairs on each side of leaf ; stro- 

 biles as long as 1.25 cm 



S. Bourgeaui Hieron. (Oregon) 



With 8-12 marginal hairs on each side of the leaf ; 

 terminal bristles 0.55-1 mm. long; strobiles 2 cm. 



long; microsporangia wanting 



S. rupestris L. (Eastern U. S.) 



With 8-12 marginal hairs on each side of leaf ; 

 terminal bristle 0.9-1.4 mm. long; strobiles as 

 long as 3cm. S. Haydeni Hieron. (Oregon, Nebraska) 

 With 8-12 marginal hairs on each side of the leaf; 

 terminal bristle 0.3-0.4 mm. long; strobiles 1.5cm. 

 long, growing horizontally and with a dorsiven- 



tral distribution of sporangia 



S. Wallacei Hieron. (Oregon) 



Plants creeping mostly with the ascending or spreading 

 branches less crowded ; branching stems mostly over 

 10 cm. long; leaves elongate-triangular or drawn out 

 into an elongate triangle from a linear-elongate base, 

 mostly ending in a sharp point. 



*Dr. Hieronymus gives this in his synopsis as S. bryoides Nutt., but 

 later corrects the synonymy because of an earlier S. bryoides which he re- 

 vives iromLycopodium bryoides described by Kaulfuss in 1824. It is in- 

 teresting to see how this Berlin doctor utterly disregards the Berlin "fifty 

 year limit" in thus reviewing Kaulfuss' name, which according to approved 

 American practice ought to be revived, but according to his own should 

 not. How any one with any pretentions of familiarity with botanical 

 literature and the practical working of rules of nomenclature can hold to 

 such a frivolous suggestion as a "fifty year limit" is one of the things to be 

 classed among psychological curiosities and amenities. 



