Vemom'a.] 



CompositcB. 



Receptacle with bracteoles {Helianthoidece). 

 Pappus none. 

 Ray-fl. few (often o in 25). 



Inv.-bracts very glandular, outer 



wide-spreading 

 Inv.-bracts not glandular, outer ones 



leafy 



Inv.-bracts not glandular, outer not 



leafy 



Ray-fl. numerous .... 



Pappus of a few scales. 

 Ray-fl. small, white 

 Ray-fl. large, yellow 

 Pappus of a few bristles. 

 L. opp. ; ray-fl. white . 

 L. radical ; ray-fl. yellow 

 Heads rayed ; fl. all ligulate {Cichoriacecc). 

 Heads small, in corymbs ; achene tapering, 

 smooth ...... 



Heads small, in clusters ; achene shortly 

 beaked, muriculate .... 



Heads large, solitary ; achene truncate, sm.ooth 

 Heads unisexual, fern. fl. apetalous . 



19. 



25. 

 22. 



23- 

 24. 



26. 

 27. 



SiGESBECKIA. 



Chrysogonum. 

 Spilanthus. 



ECLIPTA. 



Blainvillea. 

 Wedelia. 



BiDENS. 



Glossogyne. 



34. Crepis. 



35- 



36. 



20. 



Lactuca. 

 Laun^a. 

 Xanthium, 



I. VERNONZA,^ Schreb. 

 Herbs or shrubs, rarely trees, 1. simple, alt. ; heads large 

 or small in terminal cymes or rarely solitary, involucre cup- 

 shaped or oblong, bracts in several rows, innermost longest, 

 receptacle usually pitted ; fl. usually numerous, all tubular and 

 bisexual ; cor.-lobes deep, narrow ; anth.-cells obtuse or acute, 

 not tailed at base; style-arms subulate; achene usually striate 

 or ribbed, pappus of many hairs, usually with the outer row 

 much shorter, sometimes of scales. — Sp. 380; 45 in Fl.B.Ind. 



Herbs or undershrubs. 



Pappus pale red or coppery. 



Achenes terete or 4- or 5-ribbed. 

 Bracts acute or mucronate. 



L. thin, linear or linear-lanceolate 

 L. coriaceous, oval 

 Bracts obtuse, rounded . 

 Achenes lo-ribbed. 



Semi-shrubby ; heads clustered 

 Annual, heads solitary, large . 

 Pappus yellowish- or brownish-white. 

 Heads moderate-sized or large. 

 L. glabrous or nearly so. 

 Involucre cup-shaped . 

 Involucre oblong .... 

 L. densely felted beneath 



* After William Vernon, who collected in India at end of seventeenth 

 century. 



1. V. Gardneri. 



2. V. Thwaitesii. 

 12, V. pectiniformis. 



7. V. SCARIOSA. 



8. V. ANTHELMINTICA. 



3. V. ANCEPS. 

 9. V. NEMORALIS. 

 10. V. WiGHTIANA. 



