80 COMPOSITE. 



* * Style-branches of hermaphrodite flowers either truncate or capitellate at tip, which is 

 either naked or penicillate or hirsute, and not rarely bearing a short conical or flattened 

 appendage. — Subtrihe Eusenecionea>, Benth. & liook. 



-)— Involucre lax (not erect-connivent), commonly of much overlajsping or unequal bracts, 

 10-many-flowered. 



-H- Herbs, with alternate well-developed leaves and many-flowered heads. 



184. PSATHYROTES. Heads homogamous ; the flowers all hermaphrodite and fertile. 

 Involucre of somewhat numerous bracts in two series, at least the outer more or less her- 

 baceous. Receptacle flat. Corollas with extremely short proper tube (the filaments there-- 

 fore inserted near the base), elongated cylindrical throat, and 5 very short obtuse teeth. 

 Style-branches flattish, very obtuse or truncate, and witl) obscure appendage if any. Akenes 

 terete, more or less turbinate, obscurely striate, villous or hirsute. Pappus copious, 

 shorter than the corolla, of very unequal rather rigid obscurely denticulate bristles, at least 

 iu age fuscous or ferrugineous. 



185. BARTLETTIA. Heads heterogamous, radiate: flowers all fertile. Involucre 

 broadly canipanulate, of 12 to 14 oblong-lanceolate bracts in 2 or 3 series, rather lax; 

 the inner and larger membranaceous, 2 or 3 outermost sliurt and more herbaceous. Kecep- 

 tacle convex, tuberculate. Corollas with long and slender pubescent tube ; of the ray with 

 narrowly oblong exserted ligule ; of the disk with dilated-fuunelform throat longer than the 

 5 ovate lobes. Anthers with ovate obtuse tips. Style-branches rather short, linear, flat, 

 truncate, minutely hairy at the broad summit, and usually with a central setula. Akenes 

 (at maturity) comjjressed, cuneate-oblong, with a strong salient nerve to each margin and 

 usually on the middle of one face, these densely long-hirsute, the faces glabrate. Pappus 

 equalling the disk-corolla ; its numerous somewhat unequal bristles iu a single series, rather 

 rigid, barbellulate, fuscous. 



186. CROCIDIUM. Heads heterogamous, radiate: flowers all fertile. Involucre hemi- 

 .spherical or more open, of 9 to 12 nearly equal and similar oblong-ovate or oblong-lanceolate 

 thin-herbaceous bracts ; no external calyculate ones. Receptacle conical. Ray-flowers about 

 12, with oval or oliloug rather ample ligules ; disk-corollas with slender tube rather longer 

 than the campanulate throat ; lobes 5, spreading. Anthers with deltoid-ovate acute tips. 

 Style-branches short and broad, terminated by large deltoid appendages. Akenes fusiform- 

 oblong, obscurely 3-5-costate, beset with hyaline oblong papillae, which, detaching when 

 wetted, throw out a pair of spiral threads, in the manner of Senecio, &c. Pappus a single 

 series of equal white barbellate bristles, which are very deciduous, in the ray commonly 

 wanting. 



++ -H- Herb, with opposite leaves and many-flowered heads. 



187. HAPLOESTHES. Heads heterogamous, many- (at least 20-) flowered, radiate: 

 flowers all fertile. Involucre short-campanulate, of 4 or 5 nearly equal and similar rather 

 fleshy orbicular or broadly oval bracts, the outer sti'ongly overlapping the inner. Receptacle 

 flat. Corollas wdth somewhat slender tube : ligules of the rather few and short ray-flowers 

 oval : disk-corollas narrowish, deeply .5-toothed. Anther-tips lanceolate. Style-branches of 

 Senecio. Akenes linear, terete, striate-costate, glal)rous. Pappus a single series of rather 

 rigid and scabrous whitish bristles, about equalling the disk-corolla. 



++++++ Shrub, with alternate leaves reduced to scales, and 10-18-flowered heads with 

 imbricated involucre. 



188. LEPIDOSPARTUM. Heads homogamous. Involucre oblong-campanulate ; its 

 bracts scarious-chartaceous, regularly imbricated in 3 or 4 series, oblong, obtuse ; the outer 

 successively shorter ; outermo.st ovate, passing into similar scaly bracts on the pedicel. Re- 

 ceptacle naked. Corolla with elongated tube, and lanceolate-linear spreading lobes, which 

 much exceed the open campanulate throat. Anthers wholly exserted, slenderly and almost 

 caudately sagittate at base, the tips lanceolate. Style-branches flattish, ending in short 

 acutish pubescent tips. Akenes oblong, terete, obscurely 8-10-nerved, with large epigynous 

 disk. Pappus very copious, of soft and whitish minutely scabrous capillary bristles. 



-t— -I— Involucre of 4 to 6 firm and concave close and strongly overlapping bracts, 4-9- 

 flowered ; shrubs, with alternate leaves. 



189. TETRADYMIA. Heads homogamous. Involucre cylindrical to oblong, naked, i. e. 

 no accessory bracts. Receptacle flat, small. Corollas with elongated tube, and lanceolate 



