CICHOEIACEAE 1313 



b. Stems leafy below, hirsute at least below. 7. //. scabrum. 



B. Achenes fusiform, or constricted below the summit. 

 Pappus tawny or straw-colored. 



Foliage shaggy with conspicuously long, coarse hairs: species campes- 



trian. 8. H. longipilum, 



Foliage glabrous or somewhat pubescent but never shaggy: species 



not typically campestrian. 



Inflorescence narrowly paniculate. 9. H. Gronovii. 



Inflorescence corymbose. 10. H. megacephalon. 



Pappus silvery-white. 11. H. argyraeum. 



1. Hieracium paniculatum L. Foliage nearly glabrous, often glaucescent. 

 Stems erect, 3-12 dm. tall, commonly widely branched above, villous at the base: 

 leaf-blades linear-elliptic to broadly elliptic, 4-12 cm. long, acute or acuminate at 

 both ends, repand-dentate : panicle usually wide-spreading: peduncles filiform: in- 

 volucres 4-5.5 mm. high; inner bracts linear or nearly so: pappus pale tawny, sur- 

 passing the involucres: achenes columnar, 2 mm. long. 



In dry woods, Quebec and Ontario to Maine, Georgia and Alabama. Summer and fall. 



2. Hieracium Floridanum Britton. Foliage decidedly pubescent, green. Stems 

 mostly over 1 m. tall, rather widely branched above, copiously leafy, shaggy with 

 somewhat rufous hairs below the inflorescence: leaf -blades thickish, oval-oblong on 

 the lower part of the stem, ovate above 2.5-9 cm. long, sparingly pubescent with long 

 hairs, obtuse, obscurely glandular-denticulate, sessile by the truncate or subcordate 

 bases: peduncles slender, glandular-pubescent: involucres 8^9 mm. high; inner bracts 

 acute: pappus somewhat tawny: achenes fusiform, 3 mm. long. 



In sandy soil, Florida. Summer. 



3. Hieracium Scribneri Small. Foliage glaucescent. Stems erect, 3-7 dm. tall, 

 branching above, more or less densely pubescent below with spreading silvery hairs: 

 leaf -blades spatulate or oblong-spatulate below, narrowly spatulate to lanceolate above, 

 remotely denticulate, ciliate, 3-12 cm. long, the lower ones narrowed into winged 

 petioles: inflorescence corymbose: heads showy: involucres about 1 cm. high; inner 

 bracts linear-subulate, acuminate, more or less glandular: achenes columnar, 3-3.5 

 mm. long, the ribs not prominent, barbed upward: pappus tawny, surpassed by the 

 involucre. 



On hillsides, Tennessee to Georgia and Alabama. Spring. 



4. Hieracium venoaum L. Foliage nearly glabrous. Stems erect, solitary or 

 several together, scape-like, 3-6 dm. tall, corymbosely branched above: leaves mainly 

 basal, or 1 or 2 on the stem; blades obovate or spatulate, 5-15 cm. long, commonly 

 purple-veined, undulate or repand-denticulate, more or less villous on the nerves 

 beneath, ciliate, sessile or narrowed into winged petioles: peduncles slender, often 

 slightly glandular-pubescent: involucres 6-8 mm. long; inner bracts linear, tapering 

 to the apex: achenes columnar, about 3 mm. long: pappus surpassing the involucres. 



In open woods and thickets, Maine to Ontario, Manitoba, Georgia and Nebraska. Spring 

 to fall. 



5. Hieracium Marianum Willd. Foliage softly hirsute below. Stems rather 

 stout, 5-10 dm. tall, more or less widely branched into a corymbose panicle: leaves 

 basal, and few or several along the stem; blades spatulate to oblong-obovate or nearly 

 oblong, 6-20 cm. long, ciliate, undulate or repand-denticulate, narrowed into winged 

 petioles or the upper sessile; peduncles slender, more or less densely glandular- 

 pubescent: involucres 6-7 mm. long; inner bracts narrowly linear-lanceolate, gla- 

 brous or slightly pubescent: achenes columnar, 2.5 mm. long. 



In dry open woods and thickets, Rhode Island to New York and Kentucky, south to 

 Florida and Alabama. Spring and early summer. 



6. Hieracium Greenii Porter & Britton. Foliage hirsute, or shaggy below. 

 Stems scape-like, erect, solitary or tufted, 3-9 dm. tall, corymbose above, naked or 

 nearly so: leaves basal, or rarely 1 or 2 on the stem; blades spatulate or oblong- 

 spatulate, 5-20 cm. long, obtuse, ciliate, undulate, narrowed into winged petioles: 

 peduncles glandular-pilose: involucres 6-7 mm. long; inner bracts linear or narrowly 

 linear-lanceolate, acute: achenes 3-3.5 mm. long, columnar: pappus tawny. 



On mountain slopes, Pennsylvania to Georgia. Spring. 



7. Hieracium scabrum Michx. Foliage hirsute-hispid below. Stems erect, 3-9 

 dm. tall, paniculately branched and glandular-hirsute above, leafy to the inflorescence : 

 leaf -blades thickish, spatulate to obovate or oblong, 3-12 cm. long, acute or apiculate, 

 undulate or repand-denticulate, the lower narrowed into winged petioles, the upper 



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