286 SYNGENESIA — SUPER FLU A. [Aster. 



cliafFy, its scales fringed. 7rti»o/Mcre imbricated, bemispbaerical. — 

 Named from oi;, two, and rrj;, ojrog, an em; from the ear-like ap- 

 pendages to the fruit. 



26. Tanacetum. Fruit crowned with a membranous mar- 

 gin or pappus. Receptacle naked. Involucre hemisplnerical, im- 

 bricated. Florets of the ray trifid, sometimes wanting — Name 

 altered from Athanasia ; a, not, and Qavaro:, death ; or that 

 which does not quickly fade. 



27. Artemisia. Pappus 0. Involucre few-flowered, ovato 

 or rounded, imbricated. Florets of the ray, if any, slender, 

 awl-shaped. — Named from Artemis, the Diana of the Greeks. 



28. G>rAPHALiui\r. Pappus pilose, the hairs often thickened 

 upwards. Receptacle naked. Involucre scariose, imbricated, 

 often coloured. Florets of the circumference filiform. — Some- 

 times dioecious. — Name, — yvaxpaXov, soft down, or ivool, with 

 which the leaves are clothed. 



29. FiLAGO. Pappus pilose, caducous. Receptacle chaffy in 

 the circumference. Involucre imbricated, conical, of i\i\y acu- 

 minated scales. Florets 4-toothed, those of the circumference 

 filiform. — Name, — -filum, thread, the whole plant being covered 

 with slender thread-like hairs. 



30. PETAsfxES. Neai'ly dioecious. Pappus pilose. Involucre 

 imbricated in two rows of lanceolate scales. Scapes many-flower- 

 ed, appearing before the leaves Name, — c:iTa(^oc., a covering 



to the head, or an umbrella, from the great size of the foliage. 



(See Aster, and some species of Senecio, in the following Order.) 



ORD. II. SUPERFLUA. Florets of the centre tubular, per- 

 fect (^having anthers and pistils^; those of the circumferejice ivith 

 pistils only {thus as it were superjiuoiis) and ligulate, forming 

 a ray, all bearing seed. 



* Pappus pilose. 



31. TussiLAGO. Pappus pilose. Florets of the ray long, nar- 

 row, numerous ; of the disk few, (both yellow). Receptacle naked. 

 Involucre formed of a single row of equal, linear scales. (Scapes 

 single-jloioered, appearing before the leaves.) — Name altered from 

 tussis, a cough, in the cure of which the plant has been employed. 



32. Erigeron. Pappus pilose, rough. Florets of the ray 

 numerous, in many rows, very narrow, (mostly of a different 

 colour from the disk.) Receptacle naked. Involucre imbricated 



with linear scales Name from s^/, early, and ysjwv, an old man ; 



from the bald heads of the receptacles after the flowers and fruit 

 have fallen. 



33. Aster, /'ajo/jws pilose, in many rows. Receptacle r\9ke(\. 

 Involucre imbricated, n few scales on the peduncle. Florets of 



