Asteroidea.] LXXXVIII. COMPOSITAE, : 259 
99. Pteronia, Linn. Gen. n. 937.—Capitula homogama, discoidea, floribus 1—-eo 5 
sxualibus. Involucrum oblongum v. ovoideum, rarius latius campanulatum, bracteis 
cO-seriatis imbricatis coriaceis v. margine v. fere undique scariosis, exterioribus 
gradatim minoribus. Receptaculum planum v. convexiusculum, foveolatum, foveolis 
interdum margine laceris. Corolle regulares, tubo elongato, limbo campanulato prc- 
funde 5-fido. Antherz basi obtuss integrz. Styli rami complanati, sspe elongati, 
appendicibus lanceolatis brevibus v. elongatis angustisque.  Achrenia turbinata v. plus 
minus compressa, apice lata v. brevissime contracta, costis parum conspicuis. Pappi 
set; copiose v. rarius sub-l-seriatz, basi sepe in annulum connate, valde inszquales, 
plus minus barbellatz, v. exteriores tenuissim:ze flexuoscque, v. nonnulle subpaleaceo- 
dilatatz.—Frutices glabri canescentes v. rarius hirsuti, sepe glutinosi. Folia alterna v. 
scepius opposita, integerrima v. rigide ciliolato-serrulata, parva v. angusta. Capitula 
majuscula mediocria v. rarius parvula, ad apices ramorum solitaria v. rarius corymbosa. 
Corolle flayz v. eluteo purpurascentes.  Achenia glabra v. villosa. 
Species 51, Africz australis incole, — .Harv. et Sond. Fl. Cap. iii. 96. 
Genus naturale, etsi characteribus definitis haud facile limitatum, in sectiones sequentes dividitur: 
[E Scepinia, DC. Involuerum oblongum v.ovoideum.  Achznia apice haud contracta. ScePIN1A, 
Neck. Elem.i. T8. Cass. Dict. xxxvii. 470. Sub hae sectione P. baccharoides, Less., affinesque 
habitu inflorescentia involueroque Linosyridi simillim:e sunt et vix nisi pappi setis evidentius bar- 
bellatis distinguuntur. HwawTHUus, Less. Syn. Comp. 196 (P. fasciculata, Linn. f.) est species 
insignis capitulis 1-floris in glomerulum terminalem aggregatis. 
2. .Pachyderis, DC. Involuerum oblongum v. ovoideum. — Ach:snia apiee in eollum seu rostrum 
brevissimum nune vix distinctum contracta. PacuvpzEmis, Cass. Dict. lvi. 170. 
3. Pterophorus, Dc. Involuerum late campanulatum. Achznia glabra, compressa; pappi setis 
quam in p dentibus pa ibus, nonnullis subpaleaceis in annulum basi arcte connatis. PrERO- 
PHORA, Neck. Elem. i. 78. Cass. Dict. xxxvii. 474. Species unica habitu characteribusque insignis, 
simulque typica generis Linneani (P. cazpAorata, Linn.; Lam. Ill. t. 667). 
100. Roehonia, DC. Prod. v. 345.— Capitula heterogama, radiata, floribus radii 9 
1-seriatis fertilibus sterilibusve, disci 2 fertilibus. Involuerum turbinato-campanulatum, 
bracteis cc-seriatis imbricatis margine scariosis, exterioribus gradatim minoribus. Re- 
ceptaculum foveolatum.  Corolle 9 ligulatz, patentes, integre v. vix 2-3-dentate ; 
B regulares, tubulosz, limbo parum ampliato apice D-fido. Antherz basi obtusm v. 
angustatee integre. Styli fl. P rami complanati, angusti, appendicibus lanceolatis leviter 
papillosis. Achezenia (haud compressa !) 4-5-costata.  Pappi setze sub-1-seriatz, breviter 
barbellate, parum insequales, nonnullis intermixtis brevibus tenuibus.—Frutices plus 
minus cano-tomentosi. Folia alterna, parvula, coriaceà, pennivenia, integra v. pauci- 
dentata, sepe reticulata. ^ Capitula mediocria, ad apices ramorum solitaria v. minora 
confertimque paniculata. Corolle omnes (ex DC.) flavse. 
Species 2, Madagascarienses, DC. /,c. Habitus Olearie sed corolle homoehrome. Flores radii 
steriles dicuntur, in speeiminibus nostris utriusque speciei acheznia radii perfecta videntur sed non- 
dum matura. 
101. Giycideras, Cass, Dict. lix. 74. (Glyphia, Cass, in Bull. Philom. 1818 ; Dict. xix. 
108).—Capitula heterogama, radiata, floribus radii 9 l-seriatis discique 5 fertilibus, 
Involucri bractece 2-seriatze, parum inzequales, oblongze, acuminatce, erectze, membranaceze, 
subscariose. ^ Receptaculum planum, breviter fimbrilliferum. — Corolle 9 ligulate, 
*tubo longo, lamina brevi lata integra glandulis oblongis conspersa; 0 regulares, 
iubuloss, limbo parum ampliato apice breviter 5-fido. Antherm basi obtuso. Styli 
fl. 6 rami complanati, appendicibus lanceolatis superati. Ach:enia oblonga, subteretia, 
striata, hispidula. Pappi sete copiose, inzequales, barbellatze.— Frutex ? glaberrimus, 
. ramis flexuosis sarmentosis v. forte scandentibus. Folia alterna, subsessilia, ovata, 
acuminata, integerrima, glandulis pellucidis crebris notata. Capitula ad apices ramorunt 
paniculata, bracteis ramos subtendentibus subulato-acuminatis subpungentibus. - * Corollie 
flavi." 
-.*32 
