CICHOKIACEAE 1313 



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



B. Achenes fusiform, or constricted below the summit. 



Pappus tawny or straw-colored. 

 Foliage sh 



shaggy with conspicuously long, coarse hairs : species campes- 



trian. 8 . H. lonffipilum. 



Foliage glabrous or somewhat pubescent but never shaggy : species not 



typically campestrian. 



Inflorescence narrowly paniculate. 9. H. Gronovii. 



Inflorescence corymbose. ]0. H. megacephalvn. 



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 : involucres 4-5.5 mm. high ; 

 inner bracts linear or nearly so : pappus pale-tawny, surpassing 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 some- 

 what 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 slen- 

 der, 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 venosum 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 involdcres. 



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, glabrous 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 Michr. 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, un- 

 dulate orrepand-denticnlate, the loAver narrowed into winged petioles, the upper sessile by 

 narrow bases : panicle commonly elongated : peduncles rather rigid : involucres 5-6 mm. 

 long ; inner bracts narrowly linear-lanceolate : achenes columnar, 2-2.5 mm. long : pappus 

 tawny. 



In dry woods and clearings, Nova Scotia to Minnesota, south to Georgia, Missouri and Kansas. 

 Summer and fall. 



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