Cichoriacec. ] LXXXVIII. COMPOSITAE. : 527 
152. Prenanthes, Linn. Gen. n. 911, pro parte.—Capitula homogama, liguliflora. In- 
volucrum cylindraceum, sepius angustum, bracteis interioribus (5-14) 1-2-seriatis 
:equalibus membranaceo-herbaceis post anthesin immutatis, exterioribus paucis parvis. 
Receptaculum planum, nudum. — Corolls ligulate, apice truncatsze O-dentatse.  Anthere 
basi sagittatze, auriculis acutis v. breviter setaceo-acuminatis. Styli rami tenues. 
Achrenia anguste oblonga, subteretia v. compressiuscula, obtuse 3-5-angulata, ecostata 
v. costis 10 parum prominulis, basi breviter contracta, apice sequalia v. vix obscure 
attenuata, disco pappifero coronata. Pappi sete 2—3-seriatse, simplices, tenues v. rigidulze, 
sigillatim caducze.— Herbs erectz, sspe elatze v. subscandentes, glabre v. rarjus his- 
pide. Folia alterna, pleraque petiolata, sagittato-cordata grosse pinnatifida v. lyrata, 
v. superiora angusta sessilia auriculato-amplexicaulia, Capitula ssepius gracilia pendula 
laxe paniculata, rarius in panicula virgata racemiformi erecta. ^ Corolle purpurese 
violacesz albze v. ochroleucs. Styli scepius longe exserti. ] 
Species ad 16, quarum 6 Europz medi Indice orientalis et iris. Canariensium, czeterze Americze bo- 
realis incole. DC. Prod. yii. 194 (excl. sp.). Walp. Rep.ii.691; Ann. ii, 981. Jaeg. Fl. Austr. 
iv.£, 317, — Reichb. Ic. Fl. Germ. t. 1408. Jacquem. Voy. Bot, t. 108. Webb, Phytogr. Canar. t. 
124. Willd. Hort. Berol.t. 25. Pursh, Fl. Bor. Amer. t. 24. Salisb, Parad. Lond. t. 85, — Bot. 
Mag.i. 1079. Hook. Fl. Bor. Amer. t. 102 (Nabalus). 
Genus Lactucis (Cicerbitis) cremocephalis valde affine, distinguitur imprimis achzeniis Aot pauci- 
eostatis apice minime v. vix contractis, dum in Lactuca achsenia semper compressa sunt etsi interdum 
angusta, apice insigniter contraeta v. rostrata, faciebus prominule etsí tenuiter 3—5-costatis ; ideireo 
ferrimus ad Lact cum P. graciliftora, Wall. (Zactuca, DC.), etiam P. Brunonianam, Wall. 
Inter species Americanas P. racemosa, Mich., P. aspera, Mich., et, P. erepidinea, Mich., distin- 
guuntur inflorescentia hirsuta; in P. racemosa et P. virgata, Mich. , panicula virgata racemiformis 
capitulis erectis. In P. scandente, Hook. f., e montibus Hl. pappi setze rigidule 2-seriatee, 
interioribus squalibus exterioribus (v. COE SC UeM plus dimidio brevioribus; in czteris spe- 
éiebus copiose sunt albze minusque inzquales. 
NapaLus, Cass. Dict, xxxiv. 94, DC. Prod. vii. 240, Walp. Rep, ii. 691, Ann. i. 998 (HAnPALYCE, 
Don in Edinb. N. Phil. Journ. 1828-29, 308; Esorow, Haf. ex DC.), species plures imprimis 
Americanas continens, cápitulis sepius nec semper latioribus, floribus numerosioribus sepe albis, 
in nonnullis tamen (e.g. P. cordata, Willd.) capitula tenuia pauciflora iis specierum. gerontogearum 
simillima, 
793. Picridium, Desf. Fl. Atl. ii. 220. (Reichardia, oth, Bot. Abhandl. 35, ex DC.) 
—Capitula homogama, liguliflora, Involucrum campanulatum, bracteis co-seriatis imbri- 
catis membranaceo-herbaceis intimis lanceolatis subzequalibus post anthesin immutatis, 
exterioribus gradatim brevioribus latioribus scarioso-marginatis. Receptaculum planum, 
nudum. Corolle ligulate, apice truncatz 5-dentate.  Anthers basi sagittate, auriculis 
breviter setaceo-acuminatis. Styli rami tenues. . Achsnia oblonga, subteretia, costis 
4—5 crassis elevatis transverse rugoso-verrucosis, basi parum contracta, apice sub margine 
prominulo leviter constricta.  Pappi sets oo-seriatee, tenues, simplices, molles, albz, basi 
in annulum cum iis deciduum connatze.—Herbz perennes v. rarius annus, glabrs. 
Folia radicalia v. alterna, dentata v. pinnatifida, lobis ssepe margine undulato-crispis et 
iliolato-denticulatis v. fere spinulosis. Capitula longe pedunculata, pedunculo sepe 
incrassato cavoque. Corollw flave. ^ Achrenia glabra. 
Species edits 10, forte ad 5 v. 6 reducendz, Europe australis Africo borealis et Asice occidentalis 
incole. DO. Prod.vii. 182. Walp. Amm.i. 463; ii. 1028. Jacq. Hort. Schenbr. t. 148 (Sonchus). 
Vent. Jard. Malm. t. 68. All. Fl. Pedem. t. 16, f. 1 (Sonchus). Sibth. Fl. Gr. t. 792. (Sonchus). 
Vis. Pl. Serb. Rar. Dec. iii. 4. 16.  Reichb. Ic. Fl. Germ.t. 1407. Genus Soncho affine, differt involucro 
fere Scorzonere, et acheeniis nec compressis nec multicostatis. & 
754. Dianthoseris, Sch. Bip. in Flora 1842, 439.— Capitula homogama, liguliflora. 
Involucrum late campanulatum, bracteis interioribus. sub-2-seriatis seequalibus membra- 
naceo-herbaceis post anthesin. immutatis, exterioribus brevioribus magis herbaceis in 
folia abeuntibus. Receptaculum planum, nudum. . Corolle ligulats, apice truncato 
b-dentatse.  Anthers basi sagittatee, auriculis acutis. v. breviter | setaceo-acuminatis. 
