Gli. XIX.] SlfNGENESIA. 303 



with glandular serratures. Stems about two feet high, numerous, erect, 



downy, as well as the leaves : flowers bright-yellow, very numerous : 

 bracteas and segments of the calyx fringed with black glands. Peren- 

 nial : flowers in July : grows in woods and thickets : frequent. Eng. Bot. 

 vol. xvii. pi. 1156. Eng. FL vol. iii. p. 328. 1102. 



10. H.pulchrum. Small Upright St. John's-ieort. Styles three ; stem 

 erect, round ; leaves heart-shaped, smooth, clasping the stem ; segments 



of the calyx egg-shaped, with glandular serratures. Stem about two 



feet high, panicled at the top. The whole plant smooth. Petals bright- 

 yellow, tipped externally with red, fringed, like the calyx, with black 

 glands. Perennial : flowers in July : grows in woods, on heaths, and 

 in dry pastures : frequent. Eng. Bot. vol. xviii. pi. 1227. Eng. Fl. 

 vol. iii. p. 329. 1 103. 



11. H.elndes. Marsh St. John's-wort. Styles three; stems procum- 

 bent, creeping, round ; leaves roundish, hairy ; segments of the calyx 



obtuse, with glandular serratures. 'Stems about six inches long, 



branched at the base, prostrate, hairy, as are the leaves : flowers pale- 

 yellow. Perennial : flowers in July and August : grows in boggy 

 places : not common. Eng. Bot. pi. 109. Eng. Fl. vol. iii. p. 330. 



1104. 



CLASS XIX. SYNGENESIA. 



Plants bearing compound Flowers having their anthers 

 united into a tube. 



Order I. POLYGAMIA ^EQUAHS. 



Florets all perfect, each having jive stamens and one pistil, 

 and producing one need. 



* All the corollas strap-shaped. 

 10. HYPOCHCE'RIS. Receptacle chaffy. Seed-down feathery. Calyr 



oblons, imbricated. 

 12. CICHO'RIUM. Receptacle slightly chaffy. Seed-down chaffy, 



shorter than the seed. Calyx double. 

 9. CRE'PIS. Receptacle roughish. Seed-down simple. Calyx double ; 



the outer lax, tumid, deciduous. 

 8. HIERA'CIUM. Receptacle nearly naked, dotted. Seed-down 



simple, sessile. Calyx egg-shaped, imbricated. 



7. APA'RGIA. Receptacle naked, dotted. Seed-down feathery, ses- 

 sile, unequal. Calyx double ; the inner imbricated. 

 2. PI'CRIS. Receptacle naked. Seed-down feathery. Ca lyx double ; 



inner of equal leaves ; outer lax. 

 1. TRAGOPO'GON. Receptacle naked. Seed-down feathery, stalked. 



Calyx simple, of equal leaves iu two rows. 

 6. LEO'NTODON. Receptacle naked. Seed-down feathery, stalked. 



Calyx nearly egg-shaped, imbricated. 



4. LACTU'CA. Receptacle naked. Seed-down simple, stalked. Calyx 



imbricated, simple, cylindrical j scales membranous at the margin. 



5. PRENA'NTHES. Receptacle naked. Seed-down simple, nearly 



sessile. Calyx double. Florets few. 



