74 Contributions from the Gray Herbarium 
KeryY TO THE SPECIES AND VARIETIES OF THE SERIES MULTIFIDI 
Leaves bi- or tri-ternately dissected. 
Leaf-blades glabrous except for cilia on petioles or margins. 
TOMER ea? Ge aie iets os kj, baa vie as 1. E. compositus. 
EROAGN OPRINNE one a i erin sd aie see ale la. var. incertus. 
Leaf-blades hirsute. 
PIQUE TRIM 6. AG hc to ds CR a GSR LAS 8 5 ob var. multifidus. 
RANGE ORROINIE cs a es od es Cae ws le. var. petraeus. 
Leaves simply bad vt or trifid. 
Leaf- a hirs 
eads radiat + Pees Paras i LEN tae Oe aos Ne aes 2. E. trifidus. 
RAOUN OREKRIR Ee hc Cos Fi Cea ea 2a. var. antipas: 
Leaf-blades glabrous 
ds ra ae TERE pace Mepab te SANE Wea 7 ate AR Noses Some age 2b. var. prasinus. 
PORNO ores ae a ey ee i 2c. var. deficiens. 
Leaves ae Genet glabrous. 
Wagee Btae a Gr se renee A oe serene are een 3. E. pinnatisectus. 
Heads eadiats es eR Sia oe hk PE en Ky lp 3a. var. insolens. 
pe 38 Seok ee ba Pursh, Fl. Am. Sept. ii. 535 (1814). # com- 
poms Pursh, var. glabratus Macoun, Cat. Canad. Pl. ii, 231 
883). E. meullifigus Rydb., var. nudus Rydb., Meni N. y. Bot. 
Gard i. 402 (1900). JZ. Gormanii Greene, Pitt. iv. 156 (1900). 
E. compositus Pursh, var. nudus (Rydb.) A. Nels. in Coulter & 
Columbia and Alberta to veh Wiomias and Ida gaat 
ALBERTA: Devil’s Lake, Banff, July 5, 1907, Butters & Hollway, 
no. 31; Squaw ae Banff, June 20, 1903, towhot no. 273; near 
Montana: MacDoneal Peak, July 31, 1908, Mrs. J oseph Clemens 
(in part). IpanHo: Upper Ferry, Cas water River, near Lewiston, 
April 26, 1892, Sandberg, MacDougal & Heller, no. 48; Smoky 
Mts., Blaine Co., Aug. 13, 1916, Macbride & Payson, nos. 3760 & 
3761: Custer, Custer Co. , July 27, oa Macbride & Payson, no. 
3455; Parker Mt., Custer Co. ; July 17 , 1916, Macbride & Payson, 
no . 3248; Silver City, Owyhee Co., June 1 17, 1911, Macbride, no. 
899 (type of var. breviradiatus). Wromine: Golden Gate, Yellow- 
stone ag June 28, 1899, A. Nelson & E. Nelson, no. 5545 (R. Mt. 
Herb.); Big Horn Co. , July 1906, Worthley, no. 112, in part (R. 
Mt. Herb,); Laramie Peak, Aug. 7, 1895, A. Nelson, no. 6112 
(R. Mt. Herb.). British CoLumsia: July 12, 1904, Reuben T. 
poh no. 247. Chillinack Valley, Aug. 28, 1901, Macoun, no. 
la. E. composirus Pursh, var. incertus A. Nels. in Coulter 
& Nelson New Man. R. Mt. Bot. 528 Mhalegh E. multifidus Rydb., 
var. incertus A. Nels. Bot. Gaz. xxx. 198 (1900). E. compositus 
Pursh, var. discoideus A. Nels. in Coulter and Nelson New Man. 
