Class XIX. Order I. 281 



HYPERICUM VIRGINICUM. L. Virginian St. John's Wort. 

 Flowers with three styles, enneandrous, terminal ; 

 leaves elliptical, obtuse, somewhat heart shaped, 

 clasping ; stem herbaceous, compressed. Willd. 



This plant has much larger leaves than the preceding- spe- 

 cies. They are opposite, oblong, smooth, entire, heart-shaped 

 at base, closely sessile or clasping, very obtuse, paler on the 

 under side. Flowers in terminal bunches, their colour partak- 

 ing of a mixture of yellow and purple. Stamens nine united in 

 three parcels. In low ground. August. Perennial. 



Class XIX. SYNGENESIA. Anthers united 



into a cylinder ; flowers compound. 



Order I. JEQUAL1S. All the florets with sta- 



mens and pistils, and all fertile. 



A. Semifloscular, all the florets ligulate. 



299. CICHORIUM. Receptacle chaffy ; calyx in- 

 vested with scales ; seeds surrounded with numerous 

 short teeth. 



300. APARGIA. Receptacle naked ; calyx imbri- 

 cate ; down feathery, sessile. 



301. LEONTODON. Receptacle naked; calyx im- 

 bricate, with flaccid scales ; down simple, pedicelled. 



302. PRENANTHES. Receptacle naked ; down sim- 

 ple ; calyx invested with scales ; florets few, in one 

 row. 



303. LACTUCA. Receptacle naked ; down simple, 

 pedicelled ; calyx imbricate, cylindrical, scarious at the 

 margin. 



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