624 CICHORIACEAE 
5. H. florentinum, All. (Fig. 5, pl. 166.) Kina Devin. (H. pracal- 
tum, Vill.) Flowering stem 13 to 3 ft. high, not hairy, 1 to 3 small stem 
leaves at base. Basal leaves tufted, narrowly oblong or lance-shaped, very 
hairy, 2 to 4 in. long. Heads several, each about 4 in. broad. Flowers 
yellow. Fields, roadsides, a weed, north central New York. June-Sept. 
6. H. pratense, Tausch. Fretp Hawkweep. Stem 1 to 2 ft. high, 
with 1 or 2 spatula-formed leaves toward base. Tuft of basal leaves of 
numerous spatula-formed leaves 2 to 5 in. long, the whole plant very hairy. 
Flowers yellow, in“heads in. broad. Naturalized on Staten Island. 
7. H. venosum, L. (Fig. 3, pl. 165.) RATTrLESNAKE-WEED. Stem 
1 to 3 ft. high, slender, not hairy, generally without leaves, but occa- 
sionally with 1 or more small leaves. The basal leaves nearly always con- 
spicuously marked with purple borders to the veins. Cluster many- 
flowered, heads 3 in. broad, Dry woods and old fields. Common. 
8. H. marianum, Willd. (Fig. 4, pl. 165.) MAryLanp HAWKWEED. 
Flowering stem 2 to 3 ft. high, with several leaves. Basal leaves oblong, 
2 to 8 in. long, with purple at the veins. Heads numerous, flower-stem 
moderately long. Dry woods, southern section of our area. May-July. 
9. H. canadense, Michx. (Fig. 2, pl. 166.) CANADIAN HAWKWEED. 
Stem firm, erect, 1 to 5 ft. high, leafy, the leaves on the upper part of the 
stem clasping at base, all leaves conspicuously and remotely toothed at 
margins. Basal tuft not present. Flowers yellow. Woods and thickets. 
July-Sept. 
10. H. paniculatum, L. (Fig. 5, pl. 165.) PanicLep HAWKWEED. 
Whole plant smooth, basal tuft not present. Stem 1 to 3 ft. high, leafy, 
the leaves narrow lance-shaped, not prominently toothed, the small teeth 
may appear at margins. Flower heads numerous in a loose cluster, the 
flower stems standing nearly at right angles to the main stem. Flowers 
yellow. Dry woods. July-Sept. 
11. H.scabrum, Michx. (Fig. 6, pl. 165.) Rovugm HAWKWEED. 
Leaves all on the flowering stem, which is slender, 1 to 4 ft. high. Whole 
plant rough hairy, inversely egg-shaped or spatula-shaped, 2 to 4 in. long. 
Heads numerous, 4 in. broad. Flowers yellow. Dry woods. July-Sept. 
12. H. Gronovii, L. (Fig. 3, pl. 166.) Harry HAwkweep. Stem 
with or without stem leaves. Basal leaves spatula-formed, 2 to 6 in. 
long, quite hairy. Heads numerous. Flowers yellow. Dry soil. July- 
Sept. 
13. H. Greenii, Porter and Britton. (Fig. 6, pl. 166.) GRrEN’s 
HAWKWEED. Stem 14 to 2 ft. high, without hairs up to the branchings. 
Leaves in a tuft at base, spatula-formed or pear-shaped, with low teeth 
at borders or none, hairy. Heads in a spreading cluster on slender flower- 
stems. Bracts of the involucre in 1 series. Mountains of Penna. May- 
June. 
19. PRENANTHES, Vaill. (Nabalus, Cass.) 
Perennial herbs, with upright stems with many leaves, variable in 
form, with margins toothed or deeply lobed and with diffuse terminal 
clusters of greenish or yellowish, generally drooping, bell-shaped heads 
of flowers, each head composed of from 5 to 30 flowers. Involucre eylin- 
dric of linear bracts, generally in a single row with a few short ones at 
