appendix; 479 



23. E. LoBBii, T. & G. Leaves subrounded ; nmbel somewliat compound, dense ; bracts obovate or 

 lanceolate ; calyx glabrous. See page 300. 



^ 5. LACHNOQYNA, T. & G. Calyx with tlie broad base not at all produced, woolly, 6-parted, seg- 

 ments oblong and equal ; ovary exceedingly tomentose ; filaments balry at base ; involucres few, 

 capitate, or in a few subcymose heads, or solitary, short, 3-5-toothed.— Hoary casspitose perennials ; 

 leaves narrow, very crowded ; scape naked or almost none ; flowers small, yellow. 



24. E. ACAULB, Nutt. Matted caespitose, nearly scapeless ; involucres 1-5, subsessile ; leaves linear- 

 oblong, sessile. See page 300. 



2.5. E. LACHNOGYNUM, Torr. Branches of the caudex very short and crowded ; scape a span to 1° 

 high, slender; leaves lanceolate or lance-oblong, V long, acute, petioled, more or less revolutely margined, 

 silky above, tomentose beneath ; calyx silky-woolly, yellow within ; embryo strongly eccentric— S. Colo- 

 rado and New Mexico. 



§ 6. HETEEOSEPALA, T. & G. As in all the remaining sections, the flower with the usually broad 

 base not at all produced, the ovary glabrous or nearly so, the embryo incurved, and the ascending 

 radicle much exceeding the usually rounded accumbent cotyledons ; involucres capitate or umbel- 

 late-cymose on a simple naked scape, 5-8-toothed ; calyx glabrous, petaloid, 6-parted, the outer 

 segments enlarged and rOunded, at length cordate and auricled at base, the inner narrow, spatu- 

 late, emarginate and connivent, each with 3 stamens on the clawlike base ; filaments villous at 

 base. Csespitose-aoaulescent white-woolly perennials ; leaves oval or roimded, petioled, crowded ; 

 bracts very small. 



26. E. PROLIFEEUM, T. & G. Umbel proliferous-compound, with the central involucres sessile ; outer 

 segments of the rose-colored calyx becoming but slightly cordate at base. — Idaho and Washington 

 Territory. 



27. E. ovALuroLiUM, Nutt. Involucres few in simple heads ; outer oalycine segments usually deeply 

 cordate at base. See page 301. 



§ 7. CAPITATA, T. & G. Involucres sessile, capitate ; the usually naked globose heads solitary or 

 subumbellate upon a naked simple i^eduncle ; calyx mostly glabrous, the segments similar. White- 

 woolly perennials. 



* Low, csespitose, acaulescent ; head solitary ; involucres few, 5-7-toothed ; flowers not very numer- 

 ous ; bractlets slightly barbellate. 



28. E. KiNGii, T: & G. Loosely woolly; leaves spatulate or rounded, or sometimes sublanceolate ; 

 caly:x-segments obovate-Subcuneate, emarginate. See page 301. 



29. E. MULTICBPS, Nees. Very white with aiipressed wool ; branchesof the caudex ascending, leafy; 

 leaves oblong-spatulate or oblanceolate, long-attenuate at base ; scape 3-5' high ; involucres 5-10, tubu- 

 lar, 5-toothed, shorter than some of the bracts ; calyx white or yellowish, somewhat'woolly, lobes obo- 

 vate-ouneate, retuse. — S. Wyoming. 



30. E. PAUCIFIORUM, Pursh. Becoming glabrous ; branches of the caudex very short and crowded ; 

 leaves linear or subspatulate, revolute-margined ; involucres ,5-10, turbinate-campanulate, 5-toothed; 

 calyx white, glabrous, lobes oval ; filaments pubescent below. — Nebraska ; Colorado. 



* * Taller, subacaulesoent ; heads solitary or few and umbeled upon the stout naked peduncle ; in- 

 volucres short-campanulate, truncate, very many-flowered, the 5-8 teeth united by a membrane ; 

 calyx white, glabrous, lobes broad ; bractlets very villous-plumose, at length exserted. 



31. E. LATIFOLIUM, Sm. 1-2° high, the webby wool more or less deciduous ; leaves 1-2' long, oval, 

 base broad and rounded or cordate ; involucres 5-12, woolly, 5-toothed, the head sometimes 1' broad ; 

 calyx-lobes broad-ovate. — Coast of California. 



32. E. OBLONGIPOLIUM, Benth. More slender, ^1° high ; leaves oblong and oval, base usually acute ; 

 involucres glabrate, 6-8-toothed ; calyx-segments oblong-obovate. — Coast of California. 



§ 8. CAPITELLATA, T. & G. Involucres truncate, subdentate, many-flowered, usually by threes or 

 twos in small heads upon a tall naked sometimes fistulous scape, those iu the forks solitary ; calyx 

 6-parted, the nearly equal lobes obovate-oblong ; bractlets plumose. Acaulescent perennials ; 

 scape and involucres glabrate or glabrous ; leaves broad, usually undulate ; flowers white. 



33. E. NUDUM, Dougl. Leaves hoary-tomentose beneath, ovate or obovate, usually subcordate at 

 base and long-petioled ; panicle dichotomous with long branches ; involucres jcylindric-campanulate, 

 6-8-toothed, those in the forks sessile.— Very variable. Oregon and California. 



34. E. ELATUM, Dougl. Leaves villous-pubescent, narrower, usually attenuate at base ; involucres 

 more top-shaped, 5-toothed, pedicelled in the forks, the rest subglomerate. See page 303. 



- J 9. FASCICULATA, Benth. Involucres truncate, subdentate, very many-flowered, in small bracte- 



