390 TRELEASE 



ville & Kearney, 2010a ; Trelease, 2607) ; St. Matthew Island (Tre- 

 lease, 2608). Also collected on Ingersoll Islands, Yukon Valley 

 (Gorman, 988). 



58. Equisetum sylvaticum Linnaeus. 



Britton, 22. — Brixton & Brown, i : 36. — A. A. Eaton, Fern Bull. 9 : 33. 

 — Flett, 67 ; Fern Bull. 9 : 32. — Knowlton, 220. — J. Macoun, 250. — 

 Maxon, 640; List 645. — MiLDE, Monogr. 298. — Rothrock, 459. — 

 Turner, 81. 



Equisetum sylvaticum squarrosum A. A. Eaton, Fern Bull. 9: 36. — Gil- 

 bert, 9. 



Nushagak ; Kotzebue Sound ; Cape Nome. 

 Equisetum variegatum Schlich. 



CoviLLE & Funston, 349. — EASTWOOD, Bot. Gaz. 33: 129. — Flett, 67; 

 Fern Bull. 9 : 32. — Kurtz, 429. — J. Macoun, 252. — J. M. Macoun, 

 575. — Maxon, 640. — Milde, Monogr. 589. — Underwood, 129. 



Chilcat region ; Bartlett Bay ; Khantaak Island ; Unalaska ; Bering 

 Sea : St. George Island ; St. Paul Island. 

 Probably all referring to the next. 



59. Equisetum variegatum alaskanum A. A. Eaton, var. nov. 

 Gilbert, 9 — name only. 



Glacier Bay (Brewer & Coe, 629; Coville & Kearney, 620, 635, 

 733; Kincaid, 108; Trelease, 2602, 2603, 2604) ; Yakutat Bay (Tre- 

 lease, 2606, 2606a) ; Disenchantment Bay (Brewer & Coe, 632 ; 

 Coville & Kearney, 1040, 1084; Trelease, 2605); Russell Fiord 

 (Coville & Kearney, 932) ; Gens de Large and Koyukuk Rivers 

 (Schrader in 1899) ; Reindeer Station near Port Clarence (Walpole, 

 1420) ; Unalaska (Evans, 541). Also collected on Coal Creek Hill, 

 on the Yukon (Funston, 82). 



Aspect of small hyemale. Rootstocks black : roots densely brown 

 felted: stems tufted, 1.5-4.5 ^'^' ^'^1 ^"4 JTUti- wide, usually erect, 

 but decumbent or assurgent in small cespitose forms, often branched 

 after the first year when the tip of the main stem has been destroyed ; 

 branches up to 1.5 dm. long if unfruited ; internodes 25-40 cm. long, 

 dark green or with a reddish tinge, 8-12-angled, deeply and broadly 

 grooved ; ridges with a deep carinal groove, each resulting angle bear- 

 ing a row of flint points ; stomata in a single regular row on each side 

 of the ridge, each stoma connected with its opposite by two rows of 

 close-set rosulae. Sheaths short, rigid, very slightly or not at all 

 widened upwards, the leaves 4- or in very large specimens often 6- 

 angled, black at base of teeth at first, this band extending downward 

 over one-third or one-half of the sheaths or completely covering the 



