EXOGENS. 83 



dula, Marigold (St. Mary's gold). ©, QJ.. Sev. spec. Medit. shores ; 

 hds. large, yellow or orange, with strong out pleasant scent. C. offici- 

 nalis, hesfknown. Pig. 143. Tribe 6. Hds. heter6gamous orhomdg- 

 amous. 1. Othonna. Disk fits. J*, ray fits. $ ; hds. sol., pedun- 

 cled ; yellow, rarely blue. 50 spec, herbs, shrubs; Ivs. sometimes 

 succulent. Cape Colony. One, O. cheirifblia, At. shore of Medit. 

 2. Senecio. Pappus woolly; fls. yellow, crimson, purple, blue ; lv5. 

 often cinereous. 600 spec, herbs, shrubs ; often showy. Both 

 worlds. S. Cineraria, Dusty Milieu, Ivs. cinereous. S. Eur. S. 

 scandens, miscalled German Itt ; climbing, Ivs. ivy-like. Cape of 

 Good Hope. S. vulgaris. Groundsel ; erect ; weed. Ov., Pig. 180, B. 

 TJ. S. 3. Arnica. Pappus setose, hds. yellow. A. montdna, rt. and 

 Ivs. medicinal. N. Eur. ; N. U. S., Pacific Slope. Sev. other Am. 

 species. Tribe 7. Hds. of last; usualh' corymbose. Pappus or 

 coroniform. Dislc fits, usually yellow : ray same, or different color. 

 1. Artemisia. Shrubs, or herbs ; strong-scented, bitter ; hds. small ; 

 Ivs. usually dissected, often gray. Many spec, both worlds. A. 

 Absinthum, Wormwood, Absinthe. Q|.. 2°-4° high. Eur. A. 

 Abrbtanum, SotrTHERNWooD, Old Man. Q|.. 2°-4° high. S. Eur. 

 A. Dracimculus, Tarragon. Q|.. Eur. A. tridenidta, Sagb-brush. 

 Shrub, l°-6° high, gray, branched. This, with other species (Tiimble- 

 WEEDs), covering the great desert plains of the West. LT. S. 2. 

 Tanacetum, Tansy ; 3. Anthemis nbbilis, arvense, tincioria. Chamo- 

 mile ; A. Ootula, Dog-fennel, similar, but ill-scented ; 4. Achillea 

 millefdlium, Yarrow, Milfoil ; Ivs. hoary ; 5. Pyrethrum Parthe- 

 nium. Feverfew ; all common, from Eur. 6. Chrysanthemum 

 eoronarium, Q, fls. large, yellow or white; TS. Af. C. indicum, C. 

 rbseum, Ql ; hds. large, double, of various colors; Asia. C. Leucdn- 

 Memw.OT, Ox-eye Daisy; wild; from Eur. Tribe 8. Hds. of last. 

 Akaines usually crowned with paleae or bristles. 1. Gaillardia, hds. 

 sol , peduncled ; disk purple. G. lanceoldta, Q, Q|. ; rays yellow. S. C, 

 S. G. ^irfcAeMa, O? ^*ys large, crimson, yellow-tipped; La., W. G. 

 aristdta, rays large, yellow ; Missouri, W. 2. Tagetes, American 

 (miscalled Af. and Erench) Marigolds. 0. Strong-scented, l°-2° 

 nigh ; hds. showy ; rays yellow or orange, striped or mottled with 

 purple. Sev. spec. Mex., S. Am. Tribe 9. Hds. of last. Akaines 

 naked or crowned with 2-4 awns. Disk usually (sometimes ray) yel- 

 low. 1. Bidens, Spanish-Needles. 0, @, Q|.. Pests ; fls. incon- 

 spicuous; akaines with barbed awns. Sev. spec, both worlds. 2. 

 D&hlia. Akaines naked. Q|.. Bold-growing; hds. large; wild, 

 with disk yellow, ray crimson ; 2 or 3 spec, Mex. 5000 ft. above sea- 

 level. Many fine garden varieties, double, fits, quilled. 3. Heliin- 

 thus, Sttnflowbe. Akaines naked. 0, Q|.. Coarse, tall-growing ; . 

 hds. large; rays yellow, disk yellow, purple, or brown. Many spec, 

 IT. S. H. dnnuus. Great S. 0. 10°-15° high; hds. 6'-10' in 

 diam. S. States, S. Am. H. tuherbsus, Jerusalem Artichoke. %. 

 5°-7° higi ; rts. tuber-bearing. Pig. 95. Brazil. 4. Flour^nsia. Hds. 

 similar to Helianthus, but s\vle-awns difl'erent. Eesinous shrubs; 4 

 spec. New Mex., Chili. F. ihurifera, Incense Tree, Marav^lla, 

 4°-6° high ; fls. 2' in diam. Resin of Ivs. burnt as incense in Catho- 

 lic churches. 6. Rudb6ckia, Cone-flower ; hds. of Heliinthus, but 

 di.'sk conical. Qj. herbs, bold-growing. Many fi-ne spec, U. S. 6. 

 Ximin^sia. Disk-akaines winged, 2-awned. X. eneeloldes, 2° high ; 



