Part 2, 1915] 



CARDUACEAE : IIF.l.HNIKAK 



8a 



Stem-leaves twice pinnatifid with very shorl acute 



divisions, thin. 



Heads solitary; involucre 8—9 mm. high. 



Involucre 10-12 mm. broad; leaves with lanceo- 

 late divisions. 

 Involucre 5—6 mm. broad; upper leaves with 



narrow linear-lanceolate divisio 



I h ids corymbose; involucre 6 7 nun. bigh. 



bracts and ray-llowcrs 15. 

 Bracts and rav (lowers 0-8. 

 Stem leaves with long, often entire, linear or- oblong 

 divisions. 

 Plant woody only at the base. 

 Plant low, 1-2 dm. high. 

 Plant tall, 3-6 dm. high. 



Primary divisions of the stem-leaves ob- 

 long, obtuse. 

 Primary divisions of the stem-leaves linear 

 or linear-lanceolate, acute. 

 Stem about 3 dm. high, slender; involucre 

 6-7 mm. high; ligules about 7 mm. 

 long. 

 Stem 3-10 dm. high; involucre about 1 cm. 

 high; ligules 12 15 mm. long. 

 Plant shrubby. 

 Achenes glabrous. 



Practs acuminate, surpassing the disk. 



Bracts abruptly acute, not surpassing the disk. 



Heads solitary or few on long erect peduncles; plants 

 low. less than 3 dm. high, with a cespitose 

 caudex. 

 Leaf-segments mostly lanceolate, acutish; pubes- 

 cence loose, floccose. 

 Leaf-segments, especially of the lower leaves, 

 broader and rounded at the apex ; pubescence 

 close, finely white-tomentose. 

 Heads several on ascending peduncles, therefore more 

 or less corymbose. 

 Divisions of the stem-leaves long, mostly linear; 

 stems usually tall; plant with a cespitose 

 root stock. 

 Stem slender; heads small; rays less than 1 



cm. long. 

 Stem stout; heads large; rays 12-15 mm. 



. Jong- 

 Divisions of the stem -leaves short, lanceolate; 

 heads small; plant with a cespitose caudex. 

 Heads small, corymbose and short-peduncled at the ends of the 

 branches. 

 Rays 6-10; bracts 8-12, oblong, scarcely overlapping; achenes 

 hispidulous on the angles. 

 Leaves white-tomentose on both sides, twice-pinnatitid with 



many segments; achenes not glandular. 

 Leaves glabrate above, simple, pinnatifid or sometimes bi- 

 pinnatifid with few segments; achenes glandular on the 

 faces. 

 Leaves with broad lobes; inflorescence open. 

 Leaves with narrow lobes or entire; inflorescence dense. 

 Leaves mostly pinnatifid or bipinnatilid. 

 Leaves entire or rarely with a few short lobes. 

 Rays 4—6; bracts few, broadly oval, their edges strongly over- 

 lapping. 

 Heads 7-8 mm high. 

 Heads 5 mm. high or less. 



Corymbs densely congested; heads nearly sessile; achenes 

 glabrate or glandular on the faces. 

 Leaves pinnatifid, with linear divisions. 

 Leaves 3-fid (rarely 5-fid), with short divisions. 

 Corymbs more open; heads distinctly peduncled; achenes 

 pubescent all over. 

 Leaves with ascending divisions or lobes. 



Leaves pinnatifid, if ternate, the middle lobe de- 

 cidedly longer. 

 Leaf-segments lanceolate; involucre about 5 mm. 



high. 

 Leaf -segments linear; involucre about 4 mm. high. 

 Leaves ternately or bi-temately cleft above into 

 nearly equal divisions. 

 Leaf-segments linear, narrow, usually again 

 ternately cleft; stem loosely rloccose. 



22. E. Greenti. 



23. E. idoneum, 



: ■ l a h N 



}5. /.. latilobum. 



25. I. Wai 



Bolanderi, 



2 J. /•.. idoneum. 



27. E grandiflorum. 



28. E. Jepsoni. 



2'). E. multiflorum. 



30. E. lanalum. 



31. E. Cineraria. 



32. E. lernatum. 



33. E. superbitm. 

 24. /•;. achillaeoides. 



34. E. Nevinii. 



35. A', latilobum. 



36. E. arlemisiaefolium. 



57. E. Hum. 



sS. E. tanaceli folium. 



39. E con''crti>1orum. 



40. /•;. trifidum. 



41. E. cheiranthaides . 



42. E. tenuifolium. 



43. E. biternaium. 



