rS. COMPOSIT.E. 



'S. Brncts not scarious. Style of Inuliiiea? (see above . 

 Hds. Dol clustered, often radiate. Pappus of 

 hairs : — 

 Shrubby, and hds. not radiate (in our species) 

 Herbs. Frt, hardly ribbed. Pappus not double, that of 



ray scanty or 



Fi-t. ribbed. Pappus of all lis. double, outer of scales . 

 Tribe V. Heliaiithe;\?. Hds. radiate, heterogamons (uni- 

 sexual in Xanfhiain^. rarely ligiiles absent. Recejitacle 

 paleaceous. Anthers ecaudate. Style somewhat flattened 

 truncate or appendiculate, stigma marginal narrow or 

 hroader and meeting in the middle in sterile tts. often style 

 entire . Pappus of 2-^ awns or bristles or paleaceous or 0, 

 rarely plumose. I>eaves often opposite. 



1. Invol. bracts of female heads forming a 2-celled i;tricle, 



each cell with a single flower, armed with spines in 

 fruit 



2. Invol. normal. Hds. heterogamons, several-many-ttd :— 

 a. Leaves opposite. Cypseie not dorsally compressed. 



Hds. not very large : — 



i. Inner invol. bracts embracing the outer fits. 

 Pappus :— 

 Outer invol. bracts 5 spreading narrow glandular 

 Outer invol. bracts 4: in opp. pairs, broad 

 ii. Inner invol. bracts not embracing the outer frts., 

 pales of receptacle narrow. Pappus or 2 teeth 

 iii. Invol. bracts not embracing frts. but pales of 

 receptacle concave and embracing the frts. : — 

 Raj' fls, with small white ligniles. Pappus of 



2-5 unequal bristles connate at base 

 Ray with yellow ligules. Pap]3us of minute scales 

 with 1-few bristles or 0. Heeept. not elongate . 

 Ray with yellow ligules. Pappus of 2-3 bristles 

 or 0. Receptacle verj' elongate . . 

 h. L. opp. or alternate. Heads (Sunflowers) very large 

 Pai)pus of 1-3 deciduous bristles or scales or both : — 

 Peduncle not clavate above. Ligules yellow 

 Peduncles clavate above, ligules often red . 



c. Cypseles dorsally compre.ssed. Pa])pus of 2-4 strong 



awns or a minute corona (exc. 28 and 3i) : — 

 i. Pappus 0. Leaves opji. simple .... 

 ii. Pappus of 2-1 strong awns. L. pinnate or pinna- 

 tifid:— 



* Leaves opposite : — 

 Cypseie slender, not beftked . . . . 

 Cypseie slender and beaked .... 

 ** Leaves alternate or chiefly radical :— 



Cypseie linear with 2 retrorsely hispid awns . 

 Cypseie linear-oblong with two smooth awns . 

 iii, Pa])pus a minute corona. L. alternate . 



d. Cypseie turbinate or oblong. Pappus of feathery 



In-istles 



Tribe VI, Heleniea\ Hds. usually' radiate and heterogamons 

 but ligules sometimes minute or sup])ressed. Bracts of in- 

 vol. herbaceous 1-2- rarely :i-seriate. Receptacle without 

 pales. Stj'le of herm. fl. as in Helianthea\ Pappus or of 

 scales or bristles. (None indigenous.) 



L. opp. without oil-glands. Hds. compound . 



L. opj). with oil-glands. Hds. simple .... 



Tribe VII. Anthemidea\ Heads rayed or disciform, hetei-o- 

 gamous or homogamous. Invol, bracts 2-many-seriate, dry 

 or with scarious tips. Receptacle not paleaceous (iu our 

 species). Anthers ecaudate. Style-arms truncate. Pappus 

 or of short scales. L. alternate. (The Chi-i/mufkemum, 

 often grown in India, may be taken as an illustration of this 

 tribe but our species have not radiate heads.) 



17. I.inla. 



is. I'icoa. 

 ]\). Pidicai 



2(1, X. I II thin I. 



21. .S' ( ^/7 r y hfickitt 



22. Ehhi/dni. 



'I'.i. Eflipta. 



21. Blaha-iUea. 



25. ll'edelia. 



26. Spilanthc^. 



■21. IIelia)ithtl!>. 

 27*. Tithonia. 



2S. Gaizotla. 



29. Biden^. 



30. Coxmos, 



31. Glossogyne. 



32. Glosxocardla. 



33. Cht'ysanihellum. 



34, Tridcu 



35, Flaveria. 



36, Tagetes. 



45,5 



