SYNGENESIA.— ^QUALIS. 277 



463. LEONTODON. Dandelion, Composite. 



L. Taraxacum : exterior scales of the calyx reflexed *, 

 leaves runcinate, smooth, dentate. 

 HAB. Pastures, &c. April— Nov. U. Smooth; 

 leav. rad. ; fl. large , yelU 



464. PRENANTHES. Composite. 



. P. alba : radical leaves angular-hastate, somewhat 



lobed ; stem-leaves roundish-ovate, dentate, petio 



late ; racemes panicled, nodding ; calyx 8-cleftj 



9 — 12-flowered. 

 HAB. Low woods. Aug.— Sept. U . Stem 2 — 



3 ft. high ; Jl. white or pur p. 

 u. serpentaria : radical leaves palmate-sinuate ; 



those of the stem on long petioles, with the mid- 

 dle segment 3-parted. 

 HAB. Mountains. Aug. — Sept. FL purp. 

 8, nana: stem low ; lower leaves 3-parted ; middle 



ones hastate ; upper ones ovate or lanceolate ; 



sometimes all are entire. 

 II AB. High mountains. Aug. Stem 4 — 15 in. 



high; fl. purp., often erect. 

 I, P. altissima : stem branched ; leaves 3-lobed, petio- 



late, angular, denticulate, scabrous on the margin ; 



racemes axillary ; flowers nodding ; calyx about 



5-flowered. 

 HAB. Woods. Aug. U. Stem 3- 5 ft. high;fl. 



yellowish. 

 \. P. cordata : stem paniculate above ; leaves petio- 



late, cordate, denticulate, ciliate ; the uppermost 



ones sessile, oblong, entire ; flowers racemose, in 



a loose panicle, nodding ; calyx G-cleft, 6-flowered. 

 HAB. Rocky woods. Aug. U. Stem 3 — 4 ft. 



high ; fl. yellowish. 

 k. P. virgata : smooth ; stem simple ; leaves all lyrate 



sinuate ; flowers subsecund, pendulous ; cafyl 



smooth, 8-cleft, 10-flowered. 

 HAB. River banks. Sept. U . Stem S— 4 ft. 



high, slcnd. ; fl. purp. 

 .. P. racemosa : stem simple; leaves ill undivided, 



tmoothish ; radical ones oral -lanceolate, deol 

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