of the Class Compositce. 183 



In Sonc/ms the rays of the pappus are united into bundles at 

 the base, and the receptacle is rough and much dilated. 



Trib. 4. ScoRZONEREiE. Receptaculum epaleatum. Antherce 

 basi bisetae, appendicula exigua reniformi ! coronatae. Stig- 

 mata saepiCis filiformia, papillosa. Involucrum simplex v. im- 

 bricatum. 



PiCROSIA. 



Involucrum 8-phyllum. Ligulce tridentataj, 4-nervi8e ! Pappus 

 capillaris, stipitatus. 



Involucrum simplici serie 8-phyllum, cylindricum, basi omnin6 

 nudum : foliolis ligulatis, obtusis, margine invicera se im- 

 bricatis, planis. Receptaculum planum, nudum. Flosculi 

 plurimi : tubus tenuissimus, filiformis ; fauce extiis villosi- 

 uscula : ligulA lineari, tridentatd, 4-nervi4. Stamina ferh 

 omnin6 exserta : filamenta capillaria, libera : antherce levi- 

 ter coalitae, basi bidenticulatae, crista exigu4 brevissimd 

 coronatae. Stigmata brevia, semicylindrica, obtusa, papil- 

 loso-pruinosa, arcuato-conniventia. Achenia fusiformia, sul- 

 cis plurimis longitudinaliter notata, glabra. Pappus long^ 

 stipitatus, capillaris, mollis, caducus : radiis duplici ordine 

 confertis, scabriusculis, inaequalibus, basi solutis. 



Herba perennis, lavigata, glauca. Caulis erectus, pedalis, ramo- 

 sus, teres, striatus, calamum scriptorium crassitie fere ad- 

 aquans. Rami paucissimi. Folia sessilia, lanceolata, inte- 

 gerrima, nunc remotissime dentata, palmaria v. spithamcea, 

 pollicem lata ; inferiora basin versus angustata, sublingulata ; 

 superiora amplexicaulia, basi sagittata. Flores solitarii, pe- 

 dunculati. Involucrum unciale, Icevissimum : foliolis apice 

 puberulis. Flosculi lutei ? tenues, involucro longiores. Pap- 

 pus semipollicem longus, cinereofulvus. Nomen a iriKpos, 

 amarus. 



VOL. XVI. 2 b 1. V.lon- 



