of the Class Composite. 183 
In Sonchus the rays of the pappus are united into bundles at 
the base, and the receptacle is rough and much dilated. 
Trib. 4. ScorzonERER. Receptaculum epaleatum. Anthere 
basi bisetze, appendicula exiguá reniformi! coronate. Stig- 
mata sæpiùs filiformia, papillosa. Involucrum simplex v. im- 
bricatum. 
Picrosta. 
Involucrum 8-phyllum. Ligule tridentate, 4-nervie! Pappus 
capillaris, stipitatus. 
Involucrum simplici serie 8-phyllum, cylindricum, basi omnind 
nudum : foliolis ligulatis, obtusis, margine invicem se im- 
bricatis, planis. Receptaculum planum, nudum. — Flosculi 
plurimi: tubus tenuissimus, filiformis; fauce extüs villosi- 
usculà: ligulá lineari, tridentatá, 4-nervid. Stamina fere 
omninó exserta: filamenta capillaria, libera: anthere levi- 
ter coalite, basi bidenticulate, cristá exiguá brevissimá 
coronat. Stigmata brevia, semicylindrica, obtusa, papil- 
loso-pruinosa, arcuato-conniventia. Achenia fusiformia, sul- 
cis plurimis longitudinaliter notata, glabra. Pappus longè 
stipitatus, capillaris, mollis, caducus : radiis duplici ordine 
confertis, scabriusculis, inzequalibus, basi solutis. 
Herba perennis, levigata, glauca. Caulis erectus, pedalis, ramo- 
sus, teres, striatus, calamum scriptorium crassitie feré ad- 
equans. Rami paucissimi. Folia sessilia, lanceolata, inte- 
gerrima, nunc remotissimó dentata, palmaria v. HUMANS 
pollicem lata ; inferiora basin versus angus 2; 
~ superiora amplexicaulia, basi sagittata. Flores rä, pe- 
= dunculati. Involucrum unciale, levissimum : foliolis apice 
puberulis. Flosculi lutei? tenues, involucro longiores. Pap- 
pus semipollicem longus, cinereo-fulvus. Nomen a rapes 
amarus. | 
VOL. XVI. , 25 a: p. in- 
