-114— 



two -thirds their height by bron borders; or brown-centered, 

 flexuous, membranous-bordered, united or free, or early decidu- 

 ous, leaving only a small dark brown spot at the tip of the leaves ; 

 branches none or few, short or up to 18 inches long, fruited or 

 not, on the upper part of old stems. 



Type. California Balfour, 1854. I have seen it from the follow- 

 ing localities: California: Sacramento, Wilkes Exp. (Sheaths 

 black, teeth persistent, near var. J avanicum) ; Berkeley, W. C. 

 Blasdale (very stout, often with two rows of stomata) ; San 

 Rafael, Munson & Hopkins (like last, but with one row of 

 stomata). Arizona: Cedar Ranch, MacDougal. Nevada: Hum- 

 boldt Mts., Watson. Utah: Fish Lake, Jones; Glenwood, Ward. 

 Idaho: Peter Creek, Sandberg; Salmon, Henderson. Oregon: 

 Port Discovery, Wilkes Exp. Washington : Tacoma, Flett; 

 Klickitat Co., Suksdorf. British Columbia: New Westminster, 

 A. J. Hill. (No rosulse, occasionally two rows of stomata, ex- 

 traordinarily thick coating of silex.) 



Except the Berkeley and San Rafael plants these can be told 

 from robustum only by aid of the microscope to see the tuber- 

 cles and rosuke. Though specimens vary considerably in ap- 

 pearance, the presence or absence of teeth, the size and inten- 

 sity of the rings, a parallel can usually be found in a good series 

 of robustum. 



11. Doclli. Stems i l / 2 to 2}/ 2 feet high, erect, dark green, 10 

 to 20 angled, the ridges with two rows of tubercles or short 

 crossbands, the former predominating ; grooves with irregular 

 rows of rosettes; sheaths entirely black or with a narrow ashy 

 band which is broader the second year ; the leaves plainly 4 

 angled through the grooving of the central ridge ; teeth persist- 

 ent or becoming broken in age, rigid, erect, dark brown or black, 

 grooved in the center, with narrow white margins and usually 

 deciduous filiform tips. Somewhat resembles a robust E. trachy- 

 odon, which it is quite near. 



Type European. British Columbia, near Wharnock Station, 

 A. J. Hill; Vancouver, Macoun (as ramosisshnum) ; Blacktail 

 Deer Creek, Yellowstone Park, Knozdton. The latter is quite 

 peculiar in appearance and approaches robustum. None of the 

 specimens exactly agree, but will come here better than else- 

 where. The Ames Botanic Laboratory, North Easton, Mass. 



