CARDUACEAE. 
361 
VI. Decumbentes. 
Leaves i-nerved, linear-oblanceolate; the lower usually obtusish. 
Plant 1.5-2 dm. high; pubescence of the leaves sparse, loose. 
22. E. simulans. 
Plant 1 dm. high or less, usually monocephalous; pubescence dense and 
appressed. 23. E. Engelmannii. 
Leaves 3-nerved, at least at the base, equally long-acuminate at both ends. 
24. E. microlonchus. 
VII. Elatiores. 
Bracts very densely villous; leaves entire. 25. E. elatior. 
Bracts sparingly villous ; leaves usually dentate. 26. E. Coulteri. 
VIII. Salsuginosi. 
One species. 27. E. salsuginosus. 
IX. Macranthi. 
Basal leaf-blades broadly obovate-spatulate, often denticulate; stem-leaves dis¬ 
tant, shorter than the internodes, not ciliate on the margins ; bracts glandular- 
puberulent, seldom with a few hairs. 28. E. superbus. 
Basal leaf-blades oblanceolate, entire ; stem-leaves usually longer than the inter¬ 
nodes, usually ciliate on the margins. 
Bracts glandular-puberulent, not at all hirsute; leaves glabrous. 
Leaves linear-lanceolate, dark bluish green and shining, minutely ciliolate. 
29. E. salicinus. 
Leaves not dark-green, dull, strongly hirsute-ciliate. 30. E. macranthus. 
Bracts more or less hirsute. 
Stem and leaves glabrous or nearly so ; the latter ciliate only on the margins 
and the veins below; bracts glandular-puberulent and with scattered hairs. 
31. E. speciosus. 
Stem and leaves hairy; bracts hirsute or both hirsute and glandular. 
Leaves hirsute. 
Pubescence scant; that of the stem long; leaves linear-lanceolate. 
32. E. conspicuus. 
Pubescence of the leaves and the involucres dense; that of the stem short. 
Plant tall, green; upper stem-leaves ovate or ovate-lanceolate, dis¬ 
tinctly triple-nerved. 33. E. subtrinervis. 
Plant low, canescent; upper stem-leaves lanceolate, scarcely triple- 
nerved. 34. E. inccinescens. 
Leaves glandular-puberulent. 35. E. Vreelandii. 
X. Glabelli. 
Involucres glandular-puberulent, sparingly if at all hairy. 
Stem with long white hairs ; the upper portion glandular-hirsute. 
Lower leaves hairy; stem low, stout. 36. E. viscidus. 
Leaves merely ciliate ; stem slender. 37. E. eximius. 
Stem glabrous ; upper portion glandular-puberulent; leaves glabrate. 
38. E. Smithii. 
Involucre densely hirsute or strigose. 
Bracts hirsute. 
Leaves glabrate : plant evidently a perennial. 39. E. glabellas. 
Leaves more or less hairy ; plant in most cases apparently only biennial. 
40. E. consobrinus. 
Bracts strigose ; basal leaves linear-oblanceolate, denticulate. 
41. E. strigulosus. 
XI. Ramosi. 
One species. 
42. E. ramosus. 
One species. 
XII. Philadelphici. 
43. E. philadelphicus. 
