and New Westminster (Hill), covering seventeen degrees of 

 latitude, from 33 -50 , 



The type collected at San Francisco was 2-3 ft. high with in- 

 ternodes 2. 5 long, sheaths with twenty teeth. Mr. A. J. Hill has 

 sent me specimens from Xew Westminster, B. C, seven feet tall, 

 with 40 internodes, some of which are 4' long, stem in 

 diameter with the upper two thirds covered with verticils of 

 horizontal branches, which are often 16' long. The lower third 

 is naked, the sheaths with only two- thirds as many teeth as are 

 seen in the upper ones. 



The absence of stomata in the European and their presence 

 in the American plants has its analogy in Isoetes Echinospora 

 Dur. It is a curious coincidence that the variety Braunii is 

 based on this fact in both instances. 



2. Hillii "var. nov. Stems 10—15' tall comparatively slender, 

 light green, stomatose, thickly branched from the base; inter- 

 nodes short, i'-i. 5' long, distinctly grooved; sheaths short, ap- 

 pressed, light green, with fifteen to twenty very distinct leaflets, 

 each with a deep carnial groove and a shallow secondary groove 

 on each side, thus becoming 4 angled; teeth short, firm, dark 

 brown, separate, narrow, filiform-subulate, wittiout membranous 

 borders except at base ; branches many, 5-S' long, over half the 

 length of the stem, the lower erect or spreading, the upper as- 

 cending or horizontal, often arched above the middle, the tips 

 drooping, usually overtopped 4-6' by the filiform branch-like apex 

 of the stem. They are simple, with distinct central cavity 

 equalling the vallecular in size, and are 5-6 angled, each keel 

 deeply concave. This has the aspect of E. arvense bore ale \ ex- 

 cept its basal branches. Wet sides of a ravine. New Westmin- 

 ster, B. C , Nov. 1, 1899, A. J. Hill 



A very distinct variety, peculiar in its 4 angled leaves, its 

 distinct teeth, its long branches from the base, up, and especially 

 in its possession of a centrum in the 5-6 angled branches. Type 

 in Chapter Herbarium, A. A. Eaton Herbarium, U. S. Nat. 

 Museum, and several sets. Duplicate types will be furnished 

 the remainder. 



3. Gracile Milde. Stems several, csespitose, erect, pale 

 green, 7-15 angled, roughish, stomatose, conspicuously grooved, 

 branched from the base, internodes 6-12', branches 4-5 angled, 

 2-6' long, stem angles broad, deeply concave, as broad as the 

 vallecula: ; centrum and vellecular cavities about equal ; bast none. 



