1314 C1CHOKIACEAE 



8. Hieracium longipilum Torr. Foliage conspicuously shaggy with long coarse 

 hairs. Stems erect, 4-12 dm. tall, leafy to the middle, paniculately branched above : leaf- 

 blades thickish, spatulate to narrowly oblong-spatulate, or varying to lanceolate or linear- 

 lanceolate above, apiculate or acute, narrowed into winged petioles, or the upper ones sessile : 

 peduncles glandular-pilose and toinentose : involucres 7-10 mm. long ; inner bracts nar- 

 rowly linear-lanceolate, somewhat acuminate : pappus fuscous : achenes fusiform, 3.5-4 

 mm. long. 



On prairies or in woods, Ontario to Minnesota, Illinois, Nebraska and Texas. Summer and fall. 



9. Hieracium Gronovii L. Foliage more or less pubescent with slender hairs espe- 

 cially below. Stems erect, 3-10 dm. tall, paniculately branched above, leafy below, rather 

 naked below the panicle : leaves commonly hirsute ; blades spatulate to oblong, oval or 

 obovate, 4-15 cm. long, undulate or repand, the inner narrowed into winged petioles, the 

 upper closely sessile by broad bases : panicle ample or sometimes much reduced : peduncles 

 slender, glandular-pubescent : involucres 5-7 cm. long ; inner bracts linear or narrowly 

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



In sandy soil, Ontario to Massachusetts, Indian Territory, south to Florida and Louisiana. 

 Summer and fall. 



10. Hieracium megacephalon Nash. Foliage purplish and glandular above, hirsute. 

 Stems erect, usually tufted, 2-6 dm. tall, angled, corymbosely branched above : leaves 

 mainly basal ; blades oblong-oblanceolate, 4-12 cm. long, acute or apiculate, ciliate, nar- 

 rowed into short winged petioles, or those on the stem oolong to ovate, sessile by a broad 

 truncate or cordate base : peduncles densely glandular-pilose : involucres 8-10 mm. long, 

 inner bracts linear or slightly narrowed upward : achenes fusiform, 4-4.5 mm. long : pappus 

 pale tawny. 



In dry sandy pine lands, peninsular Florida. Spring. 



11. Hieracium argyraeum Small. Foliage pubescent throughout. Stems 2.5-5 

 dm. tall, usually several together, corymbose and glandular above : leaves mainly basal ; 

 blades spatulate to oblong, 2-9 cm. long, quite shaggy with hairs similar to those on the 

 lower part of the stem, those of the upper stem-leaves with broad bases and sessile : pedun- 

 cles glandular-pubescent: involucres 10-11 mm. high; inner bracts attenuate: pappus 

 silvery white : achenes fusiform, 3-3.5 mm. long. 



In pine lands, peninsular Florida. Spring. 



3. SITILIAS Raf. 



Biennial or perennial caulescent or scapose usually upright herbs. Leaves some- 

 times all basal ; blades irregularly toothed, pinnatifid or sometimes entire. Heads yellow, 

 long-peduncled. Involucres oblong to campanulate, double ; inner of several narrow 

 slightly united bracts ; outer of several series of much smaller bracts. Rays yellow, trun- 

 cate and toothed at the apex. Anthers sagittate at the base. Stigmas stout, rather 

 obtuse. Achenes oblong to fusiform, beaked, usually 5-ribbed, pubescent or scabrous. 

 Pappus of numerous brownish hair-like bristles accompanied by a ring of hairs at their 

 bases. [ Pyrrhopappus DC. ] FALSE DANDELION. 



Caulescent : stems branching : heads several. 



Bracts of the outer involucres fully % to over % as long as the inner : heads fully 



2.5 cm. long at maturity. 1. S. Caroliniana. 



Bracts of the outer involucres less than % as long as the inner : heads 2 cm. long 



at maturity or shorter. 2. S. multicaulis. 



Scapose : scapes simple : head solitary. 3. S. grandiflora. 



1. Sitilias Caroliniana (Walt.) Raf. Foliage glabrous or nearly so. Stems erect, 

 1-1.5 dm. tall, usually branched : leaves various ; blades more or less deeply pinnatifid, 

 sometimes merely denticulate or nearly entire, these conspicuously elongated : involucres 

 12-26 mm. long ; inner bracts narrowly linear ; outer bracts narrower, fully ^ to over as 

 long as the inner : ligules yellow : achenes about 5 mm. long, ribbed, somewhat rufous. 

 [Pyrrhopappus Carolinianus (Walt.) DC.] 



In dry soil, Delaware and Missouri, south to Florida and Texas. Spring to fall. 



2. Sitilias multicaulis (DC.) Greene. Foliage minutely pubescent, or glabrate. 

 Stems solitary or tufted, ascending or spreading, 1-4 dm. long, more or less branched : 

 leaves mainly basal, 5-15 cm. long ; blades sinnate or irregularly pinnatifid, the segments 

 entire or toothed ; upper leaves narrower, deeply pinnatifid or merely toothed : involucres 

 1-1.5 cm. long; inner bracts narrowly linear, acute; outer bracts linear-subulate, \ to 

 nearly as long as the inner bracts: ligules bright yellow, oblong or linear-oblong, 1.5-2 

 cm. long : achenes 3.5-4 mm. long, reddish, transversely wrinkled. 



In dry soil, Florida to Texas, Arizona and adjacent Mexico. Spring and summer. 



