Compositae. 93 



XXXI. — CHR YSA NTH E MUM. 



Pappus none, involucre hemispherical or flat, bracts imbricated with 

 scarious margins, disk-florets tubular yellow, ray-florets ligulate yellow or 

 white, ray large. 



CHRYSAN'THEMUM LEUCAN'THEMUM(io8). Ox-eye. 6—8. 



(766) Ray white, bracts with narrow margins. Pastures. 



CHRYSAN'THEMUM SEG'ETUM (109). Corn Marigold. 6—9. 

 (765) Ray yellow, bracts with broad margins. Cultivated fields. 



XXXII.— il/^ TRIG ARIA. 



Pappus none or a mere border, bracts of the involucre scarcely membra- 

 neous at the margin, disk-florets yellow, ray-florets white, leaves alternate 

 much-divided, achenes angular with a large epigynous disk. 



Disk very conical, . . . . . . . M. Chamomilla 



Disk flat or slightly convex, 395 



395 Ray very short, M. Parthenium. 



395 Ray large, ....... M. inodora. 



MATRICA'RIA PARTHE'NIUM. Feverfew. 7—9. Leaves pinnate, 



(767) segments ovate cut, ray very short, heads many corymbose. Hedge- 

 ba7iks, etc, , and in gardens. 



MATRICA'RIA INODO'RA (iii). Corn Feverfew. 6—10. Leaves 



(768) bi-pinnatifid with very narrow segments, heads solitary 2 in diameter 

 with a large ray. Fields, etc. 



MATRICA'RIA CHAMOMIL'LA (62). Wild Chamomile. 6—8. 



(769) Receptacle very conical, heads \ — f in. diameter, ray short truncate 

 toothed, leaves bi-pinnatifid with very narrow segments. Fields. 



XXXlll.— ACHILLEA. 



Leaves alternate entire or divided, heads in corymbs yellow or with the 

 ray white or purple, pappus none, receptacle flat covered with chaffy scales. 



ACHILLE'A PTARMI'CA (108). Sneeze-wort. J—^. Leaves linear- 

 {759) lanceolate serrate glabrous, flowers white. Meadows. 



ACHILLE'A MILLEFO'LIUM (112). Yarrow. 6—9. Leaves bi-pin- 

 (758) natifid woolly, disk white or yellowish, ray pink white or purple. 

 Waysides. 



XXXIY.— ASTER. 



AS'TER TRIPO'LIUM (65). 7—9. Stem 2—3 ft. erect, leaves lanceolate 

 (730) fleshy, flower-heads in a compact corymb, bracts few oblong, florets 

 of ray purplish ligulate, disk -florets tubular yellow. Salt marshes. 



