270 MONOPETALOUS ORDERS. 



Genera. — Sparganophorus, Vernonia, Stokesia, Elephantopus, Pectis, Agera- 

 tura, Stevia, Kuhnia, Liatris, Eupatorium, Mikania, Brickellia, Tussilago, Aster, 

 Erigeron, BoUonia, Bellis, Chrysopsis, Sulidago, Chrysocoaia, Couyza, Baccharis, 

 Pterocaulon, Inula, Eclipta, Dahlia, Siegesbeckia, Chrysogonum, Silphium, Am- 

 brosia, Polymnia, Iva, Parthenium, Zinnia, Heliopsis, Rmlbeckia, Coreopsis, Acti- 

 nomeris, Helianthus, Bidens, Verbesina, Tagetes, Leptopoda, Tricophyllum, Polyp- 

 teris, Galardia, Helenium, Marshiillia, Anthemis, Achillea, Santolina, Matricaria, 

 Artemisia, Tanacetum, Gymuostyles, Guaphalium, Cineraria, Arnica, Cacalia, Sen 

 ecio, Calendula, Melananthera, Sonchus. 



Fig. 193. Chrvsanthemum leucanthcmmn. 



Fig. 194. Eupatorium i-tcrfoliatum : a, stem, upright, branching; 6, inflorescence 

 a dense, depressed corymb ; florets tubular, white. 



473. LoBELiACE^, the Lobelia Tribe. — Herbs or shruhs with 

 milky juice. Leaves alternate. Calyx 5-lobed. Corolla irreg- 

 ularly 5-lobed, usually appearing bilabiate, cleft on one side 

 nearly or quite to the base. Stamens 5 ; anthers coherent into 

 a tube. Ovary inferior ; stigma fringed. Fruit capsular, 2 

 or 3 celled. Seeds numerous ; embryo straight, in fleshy albu- 

 men. 



a. Properties : narcotic, acrid poisons. 

 Genera. — Lobelia, Clintonia. 



474. Campanulace^, the Bell-flower Tribe. — Herbs or under- 

 shriibs, with milky juice. Leaves alternate, simj^le, or deeply 

 divided. Flowers usually showy. Calyx usually 5-lobed, per- 

 sistent. Corolla regular, campanulate, usually 5-lobed, with- 

 ering. Stamens 5, alternate with the lobes of the corolla. 

 Ovary inferior ; style covered with hairs ; stigma naked. 

 Fndt a capsule, 2 to several celled. Seeds numerous, albu- 

 minous. 



Genus. — Campanula. 



475. Ericaceje, the Heath Tribe. — Shrubs^ or sometimes 

 herbs. Leaves often evergreen, rigid, entire, verticillate or op- 

 posite. Calyx 4-5-cleft, nearly equal, persistent. Corolla 4-5- 

 cleft, sometimes the petals are distinct. Stamens as many, or 

 twice as many, as the segments of the corolla with which they 

 are inserted ; anthers 2-celled, often appendaged. Ovary free 

 or adherent ; styles and stigmas scarcely distinct. Fruit cap- 

 sular or baccate, many-celled. Seeds numerous, albuminous ; 

 emh^yo cylindrical. This order has been divided into 1, Yac- 

 dnicB (the Whortleberry Tribe) ; 2, Fricince (the proper Heath 

 Tribe) ; 3, Rhododendrm (the Kosebay Tribe) ; 4, Fyroloe (the 

 Pyrola Tribe) ; 5, Monotrojyae (the Indian-Pipe Tribe). 



Genkra. — 1. Vaccinle — Oxycoccus, Vaccinium. 2. Ericinjs — Erica, Meuzlesia, 

 Andromeda, Clethra, Epigaea, Gaultheria, Arbutus. 3. RnoDODENDRiE — Azalea, 

 Kalmia, Rhododendron, Khodora, Bejaria, Ledum, Leiophyllum. 4. Pyrola — Chi- 

 niaphila, Pyrola, Galax. 5. Monotrop^ — Monotropa, Pterospora, Monotropsia. 



476. AQUiFOLiACEiE, the Holly Tribe, — Trees or shruhs. 



