h) =Wild Lettuce, Lactuca floridana.=

25a. Achene tipped with a slender beak, bearing the pappus at its summit
(summer) (Wild Lettuce) --26.

25b. Achene without a beak --29.

26a. Leaves hirsute or hispid on the mid-veins beneath --27.

26b. Leaves glabrous --28.

27a. Leaves pubescent on both sides (1-2 m. high)
=Wild Lettuce, Lactuca hirsuta.=

27b. Leaves glabrous, except on the mid-vein (5-15 dm. high)
=Wild Lettuce, Lactuca scariola var. integrata.=

28a. Leaves entire or sparsely toothed (1-2 m. high)
=Wild Lettuce, Lactuca sagittifolia.=

28b. Leaves chiefly sinuate-pinnatifid (1-3 m. high)
=Wild Lettuce, Lactuca canadensis.=

29a. Flowers white, cream-color, or purplish (summer and autumn)
(Rattlesnake Root) --30.

29b. Flowers bright-yellow or orange --33.

30a. Heads nodding (6-20 dm. high) --31.

30b. Heads pointing in various directions, in spike-like panicles;
involucres pubescent (5-15 dm. high)
=Rattlesnake Root, Prenanthes racemosus.=

31a. Heads with 5-7 flowers in each
=Rattlesnake Root, Prenanthes altissima.=

31b. Heads with 8-12 flowers --32.

31c. Heads with 20 or more flowers
=Rattlesnake Root, Prenanthes crepidinea.=

32a. Pappus dark reddish-brown
=Rattlesnake Root, Prenanthes alba.=

32b. Pappus pale-brown or nearly white
=Rattlesnake Root, Prenanthes trifoliata.=

33a. Pappus tawny or brown in color (summer and autumn) (Hawkweed) --34.

33b. Pappus white --42.

34a. Heads 2.5 cm. in diameter, or larger --35.

34b. Heads 1-2 cm. in diameter (4-10 dm. high) --37.

35a. Leaves all basal (1-4 dm. high) =Hawkweed, Hieracium pilosella.=

35b. Stem-leaves present (4-15 dm. high) --36.

36a. Leaves rounded at the sessile base
=Hawkweed, Hieracium canadense.=

36b. Leaves narrowed toward the base
=Hawkweed, Hieracium umbellatum.=

37a. A rosette of basal leaves conspicuous at flowering time --38.

37b. No rosette of basal leaves at time of flowering --41.

38a. Leaves glabrous on the upper side