622 CICHORIACEAE 
13. HIERACIUM, L. 
Herbs, mostly hairy but exceptionally without hairs, with basal or 
alternate leaves and small or ‘not very large heads of flowers, mostly yel- 
low or orange. Leaves entire or less frequently toothed. Involucre with 
the bracts more or less overlapping, the outer gradually diminishing. 
Receptacle flat, naked. Fruit not prolonged to a column or beak, aigrette 
one row of fine rough bristles. 
Flower stems leafless or with one (rarely more) leaf and possibly a few 
bracts 
Stem leafless, bearing a single head . .~- . . -. «© »- -« « « « A. Pilosella 
Stem bearing several heads. 
Leaves with very prominent teeth. 
Rounded or heart-shaped at base . . . . . . . . HA. murorum 
Taperings; at eadchend’) <) See ahs 2) =e ase H. vulgatum 
Leaves with entire margins, or with low, inconspicuous teeth. 
Flowers orange-red . «© « © « «© © + « »« « Hz aurantiacum 
Flowers yellow. 
Stem smooth or only slightly downy. 
Leaves purple veined . . . . + + « - HH. venosum 
Leaves not purple veined. 
Leaves lance-shaped . . . . . H. florentinum 
Leaves oblong or inversely egg-shaped. 
The flower stem not hairy . H. marianum 
, The flower stem hairy . . . HA. Green 
Stemivery hairy.) (eye) eres ene ey te eee renee 
Flower stem decidedly leafy 
Leaves conspicuously toothed . ... . . . . + «- H. canadense 
Leaves with low teeth or none. 
Piant not hairy or only slightly downy below . . H. paniculatum 
Plant decidedly hairy. 
Plant with tuft of lower leaves . . . . . «. H. Gronovii 
Plant without a tuft of lower leaves . . . . . H. scabrum 
1. H. Pilosella, L. (Fig. 2, pl. 165.) Mousr-rar HAwKweep. Plant 
propagated largely by runners which are leafy. Flowering scape slender, 
naked, not hairy, 4 to 10 in. high, bearing a single head of yellow flowers 
1 in. broad. Leaves oblong or lance-shaped, very liairy, often whitish silky 
beneath. Dooryards and fields, an European plant. Naturalized in places. 
May-Sept. 
2. H. murorum, L. Watt Hawkweep. Basal leaves egg-shaped, apex 
obtuse or sharp, base heart-shaped or nearly so, margins deeply toothed 
toward the base, veins purple. Flower stem 1 to 24 ft. high, with 2 or 
more flower heads, downy or smooth. On the flower branches are found a 
few linear bracts. Naturalized in a few places. European. June-Aug. 
3. H. vulgatum, Fries. (Fig. 4, pl. 166.) HAwkKWEED. Basal leaves 
broad lance-shaped with sharp, remote teeth at margins, tapering at each 
end, 2 to 5 in. long. Stem smooth or downy, 1 to 3 ft. high, with numer- 
ous flower heads. Naturalized. July-Sept. 
4. H. aurantiacum, L. (Fig. 1. pl. 166.) Orance HAWKWEED. PAINT 
Brusu. Rosette of basal leaves, each spatula-formed or oblong, obtuse 
at apex, the whole plant very hairy; height of flowering stem 6 to 20 in. 
high. On the stem a small leaf or two leaves is sometimes found. Flower 
heads several in a rather compact cluster, the individual flower stems 
being short, the head about 1 in. broad. Flowers dark orange. Along 
roadsides, in fields and woods, most of our range. June-Sept. 
