60 COMPOSITE. 



short tube. Hermaphrodite-sterile, with usuall}' a stipitiform abortive ovary, tubular-fuunel- 

 form 5-toothed corolla, its short proper tube thickened, and a truiicate-bicapitellate style. 

 Akene of the fertile flowers obovate, turgid, free, thiimish, nearly nerveless, the upper part 

 villous witli long soft hairs, wholly destitute of pappus ; the epigynous areola small and 

 sliglitly depressed. Flowers yellow. 

 156. BLENNOSPERMA. Heads many-flowered. Involucre simple, broad. Akenes 

 pvriform. Perliaps l)elongs liere rather than to the Ilrlenioidece, where it has no near rela- 

 tives : perhaps it should stand next to Crocidium, no. 186. 



Subtribe II. MELAMPODIE^E. Eay-flowers ligulate (sometimes obscurely so) ami 

 fertile, the ligule mostly deciduous: clisk-Howers hermaphrodite-sterile. Akenes usually 

 Avith coriaceous or thicker pericarp, the style mostly entire. Receptacle paleaceous 

 througliout, Parthenice excepted. (Artificial group.) 



* Involucre of the several-flowered heads cylindrical or fusiform, of membranaceous or thin- 

 nish and striate-nerved oblong bracts, uot enclosing or embracing the few narrow and 

 somewhat obconipressed akenes; those of the small and flat receptacle .scarious. (Allied 

 to the Coreopsidea'.) 



65. DICRANOCARPUS. Involucre of 3 or 4 narrow bracts (and rarely 1 or 2 short and 

 subtending herbaceous ones), at length loose, deciduous in age. Ray-flowers 3 or 4; the 

 ligule very small, shorter than the .style, 2-3-lobed, and with hardly any tube. Disk-flowers 

 3 or 4 : corolla with rotately-spreading limb parted into 5 ovate lobes, rather longer than 

 the narrow tube : style tipped with an entire conical appendage : ovary inane. Akenes di- 

 morphous, one or two elongated to fully twice or thrice the length of the involucre, from 

 subulate to oblong-linear, nearly smooth, puberulent, long persistent on the receptacle, 

 tipped with two diverging or divaricate and stout persistent naked rigid awns or horns ; the 

 others shorter, comparatively thicker, often tuberculate-rugose, the truncate apex bearing a 

 pair of very short divaricate horns or hardly any. 



66. GUARDIOLA. Involucre of 3 concave and herliaceo-membrauaceous bracts com- 

 pUitely enclosing 3 or 4 narrower white-scarious ones ; and there are narrower similar paleoe 

 suTitending the sterile flowers. Tube of the corolla both of ray and disk long and filiform; 

 in the 1 to 5 fertile flowers eiiualling the oblong ligule ; in the 5 to 20 sterile flowers com- 

 monly several times longer tliau the abruptly dilated deeply 5-cleft limb (its lobes linear). 

 Filaments very villous ! Style of the disk-flowers nio.stly 2-cleft at apex, its branches linear 

 or subulate, hispid to the base : ovary inane. Akenes oblong, slightly obconipressed, smooth, 

 tiie rounded apex wholly destitute of pappus ; the base suberose-fleshy, sometimes as a boss 

 upon one side. 



* * Involucre of the many-flowered heads broad; the inner liracts concave, embracing 

 and half enclosing the thick and turgid obovoid akenes : pappus none. 



67. POLYMNIA. Heads hemispherical or broader. Involucre of about 5 loose exterior 

 bracts, and as many or more numerous smaller and thinner interior ones, .subtending as 

 many fertile flowers : sterile flowers subtended by mostly scarious chaffy bracts of the flat 

 receptacle. Kay -flowers with a short hairy tube bearing either a short or a long ligule, or 

 none at all. Corolla of the disk-flowers thin, ampliate above, and with ovate lobes. Sterile 

 style commonly 2-cleft or 2-j)ointed at the hairy apex. Akenes very tliick, sliort, smooth, 

 marginless. 



* * * Involucre double, strongly dimorphous ; exterior of 4 or 5 herbaceous or folia- 

 ceous plane bracts; interior of a single series of small bracts, which completely and 

 permanently enclose the obovate or oblong more or less compressed smooth and glabi'ous 

 akenes with a pericarp-like accessory covering, at length deciduous together : pappus none. 



68. MELAMPODIUM. Fructiferous and transformed involucral bracts commonly in- 

 durated, naked or unarmed. Receptacle convex or conical. Akenes more or less obovate 

 and incurved. 



69. ACANTHOSPERMUM. Fructiferous involucral bracts armed with hooked prickles 

 or sjiines, forming a kind of bur. Otlierwi.se as Mdampodlum. Ligules minute, concave or 

 cucullate. 



* * * * Involucre broad, of plane or barely concave bracts; innermost subtending ob- 

 conipressed (mostly much flattened) akenes, but uot enclosing nor embracing them. 



