PLANTS OF SOUTHERN NEW JERSEY. 729 



//. Plant glabrous. Heliopsis, p. 768 



dd. Pappus present, heads entirely yellow. 



e. Involucral bracts in one row, heads 15-20 mm. broad, in a 

 terminal corymb, basal leaves numerous. 

 /. Leaves and stem wooly. Senecio tomentosus, p. y77 



ff. Leaves glabrous or nearly so. 



g. Basal leaves cordate ; orbicular or ovate. 



S. aureus, p. yyj 

 gg. Basal leaves not cordate. 



h. Leaves ovate, flowers large. S. crawfordi, p. 777 

 2e. Involueral bracts in several rows. 



/. Plant low, woolly or with silky hairs. 

 g. Leaves elongate linear, plant woolly. 



Chrysopsis falcata, p. 741 

 gg. Leaves oblong or lanceolate, pubescent, with silky 

 hairs, becoming glabrate. C. mariana, p. 741 



//. Plants usually tall, pubescent or glabrous, but not woolly 

 or silky hairy. 

 g. Rays more numerous than the disc flowers, leaves 

 linear or linear lanceolate. 

 h. Leaves 3-5 nerved. 



i. Branches of the inflorescence and leaves ex- 

 cept the veins beneath glabrous. 



Buthamia graminifolia, p. 751 

 ii. Branches of inflorescence and leaves pubes- 

 cent. E. g. nuttallii, p. 752 

 hh. Leaves i nerved. £. tenuifolia, p. 752 

 gg. Rays not more numerous than the disc flowers. 



Solidago, p. 742 

 hh. Rays white. 



c. With pappus. 



d. Pappus very short and scaly. [Galinsoga parviHoraY 



dd. Pappus well developed and feathery. 

 e. Bracts in 2-many rows. 



f. Involucre oblong or narrowly campanulate, rays white. 

 g. Inflorescence a terminal spike like thyrsus. 



Solidago bicolor, p. 744 

 gg. Inflorescence a cymose panicle. 



h. Leaves linear or spatulate entire. 



Sericocarpus linifolius, p. 753 

 hit. Leaves oblong or obovate dentate. 



S. asteroides, p. 753 

 ff. Involucre turbinate, bracts thin, rays purple, pink or 

 white. Aster, p. 754 



ee. Bracts in i or 2 series, very narrow. 

 f. Flower heads 12-25 rfirn- broad. 



g. Leaves lanceolate to ovate, heads numerous. 



' Galinsoga, a weed in waste ground, etc. 



