COMPOSIT.-E. 79 



maphrodite either sterile or fertile; or horaogamons, with the flowers all hermaphrodite 

 and fertile. , Anther-tips slender and pointed. Akenes ohovate or oblong, mostly with small 

 epigynous disk or summit, and no pappus. 



Tribe ^'III. SEXECIOXIDE.E. Heads heterogamous or homogamous. Involucre 

 mostly one or two series of equal (and not scarious) bracts, sometimes unequal or 

 even imbricated, with or without loose and short accessory ones at base. Receptacle 

 naked. Anthers without tails at base, but not rarely sagittate. Style-branches of her- 

 maphrodite flowers most commonly truncate or obtuse, tipped with short appendages or 

 none. Pappits of numerous capillary bristles, sometimes caducous. Leaves usually 

 alternate. (Copious capillary pappus, comparatively simple involucre, short or conical 

 if anv style-tips, tailless anthers, and naked receptacle, are the marks of this tribe, no 

 account being here taken of the tropical American subtribe Liabtce.') 



* Style-branches of hermaphrodite fertile flowers roundish-obtuse, or at least not truncate, 

 and wholly without appendage or hispidity at summit, simulating Iiuiluidra or Eupatori- 

 acecE : pappus-bristles merely denticulate ; receptacle naked, flat. — Subtribe Tussilaginem, 

 Benth. & Hook. 



H— Heads submonoecious or subdicecious ; the hermaphrodite flowers (with rather deeply 

 5-cleft coroUa) essentially sterile: akenes narrow, 5-10-costate, with elongating soft and 

 white pappus : involucre a series of soft herbaceous bracts, with few or no loose accessory 

 ones at base, — True Tussdaginem. 



179. TUSSILAGO. Head solitary, yellow-flowered, moncecious : female flowers in several 

 series in the ray, slenderly ligulate ; numeroas subhermaphrodite flowers in the centre, with 

 undivided style and sterile ovary. 



180. PETASITES. Heads racemosely or corymbosely disposed, white- or purplish-flow- 

 ered, subdicecious : heads in the truly fertile plant wholly or chiefly of female flowers, with 

 slender-tubular and irregularly 2-5-toothed' or distinctly ligulate corolla ; in the substerile 

 with few of these in the margin, and numerous hermaphrodite-infertile flowers, like those of 

 Tussilago, but their style commonly with 2-cleft or 2-toothed apex. 



^_ 4_ Heads homogamous, discoid, of wholly hermaphrodite and fertile flowers: style- 

 branches very minutely granular-puberulent. 



++ Corollas yellow, rather deeply 5-cleft, the lobes lanceolate : anthers much exserted and 

 with lanceolate tips : akenes linear, glabrous : involucre hardly herbaceous, simple, of 

 carinately one-nerved narrow bracts, and with few and small or no accessory bracts. 



181. CACALIOPSIS. Heads very many-flowered. Involucre broadly campanulate, of 14 

 to 30 lanceolate-linear mostly acuminate bracts. CoroUa with the cylindraceous throat rather 

 longer than the slender tube. Anthers entire at base. Style puberulent for some distance 

 below the slightly flattish branches. Akenes 10-striate. Pappus very copious, soft and 

 white, equalling the corolla. Leaves palmately lobed, petioled. 



183. LUINA. Heads about 10-flowered, Involucre oblong-campanulate, of 8 to 10 linear 

 bracts. Corolla of the preceding, or the throat more ampliate. Anthers sagittate at base. 

 Style glabrous, its flattened and linear branches obscurely papiUose on the back, truncately 

 obtuse. Akenes (immature) obscurely 10-striate. Pappus of the preceding, but less 

 copious. Leaves entire, veiny, sessile. 



++ «■ CoroUas yellowish, obtusely 5-toothed: anthers little exserted, with oval obtuse tips ; 

 involucre mostly foliaceous 1 



183. PEUCEPHYLLUM. Heads 12-25-flowered. Involucre carapanulate, of numerous 

 subulate-linear or almost filiform nerveless bracts which resemble the leaves, in about 2 

 series, some of the outer looser and similar to the uppermost leaves. Corolla with very 

 short proper tube and long cylindrical throat; the 3 teeth short, ovate, obtuse, erect, ob- 

 scurely puberulent. Anthers minutely sagittate at base. Style-branches linear, flattish or 

 semiterete, obscurely papillose-puberulent, the very obtuse tip wholly destitute of appendage, 

 Akenes turbinate-oblong, obscurely 10-striate, very hirsute. Pappus shorter than the co- 

 rolla, of very numerous and unequal rather sordid and roughish capillary bristles. Leaves 

 short-filiform, crowded. 



