PLANTS OF SOUTHERN NEW JERSEY. 727 



gg. Stem 2-4.5 dm. high, leaves mainly basal. 



h. Basal leaves small and narrow, 7-20 mm. long, one 

 nerved. 



i. Spatulate, stolons assurgent, rather leafy 

 throughout, but terminal leaves longest. 



Antennaria neodioica, p. 766 

 a. Oblanceolate, stolons procumbent, bractiate, 

 but with leaves only at the tip. 



A. neglecta, p. 766 

 hh. Basal leaves large and broad, 20-120 mm. long, 

 three or five nerved. 



i. Basal leaves and those at the ends of the 

 stolons bright green and glabrous above. 



A. parlinii, p. 767 

 a. Basal leaves and those at the ends of the 

 stolons dull above, with tomentous or arach- 

 noid pubescence. 

 /. Heads averaging 7 mm. high. 



A. plantaginifolia, p. 766 

 jj. Heads averaging 9 mm. high. 



A. fallax, p. 766 

 ff. Not dioecious, stem upright leafy. 



S- 30-90 cm. high. Gnaphaliiim obtusifolium, p. 767 



gg. 5-20 cm. high. G. uliginosum, p. 768 



ee. Plants not wooly. 



/. Flower heads 12-20 mm. high. 



g. Leaves lanceolate or ovate-lanceolate, tapering to the 

 base. Erechtites, p. 776 



gg. Leaves reniform, or somewhat triangular, often trun- 

 cate at the base. 

 It. Leaves glaucous. Mesadenia atriplicifolia, p. 776 

 hh. Leaves not glaucous. M. reniformis, p. 776 



//. Flower heads 4-8 mm. high. 



g. Achenes ribbed. Kiihnia, p. 739 



gg. Achenes five-angled. Enpatorium, p. 732 



dd. Flowers greenish or yellow. 



e. Foliage bristly, heads large. Carduus spina sissimus, p. 779 

 ee. Foliage not bristly. 



f. Heads green, 2-3 mm. broad in wand-like racemes, 

 leaves finely dissected. Artemisia, p. 775 



ff. Heads yellow or greenish, 6-10 mm. broad. 



g. Leaves pinnatifid, achenes without barbed awns. 



[Tanacetum vulgar eY 

 gg. Leaves lanceolate or 3-5 parted, achenes with 2-5 

 barbed awns. Bidens, p. 772 



hh. Flowers blue, pink or purple. 



c. A climbing vine with clusters of purplish, inflorescence and trian- 

 gular leaves, nearly glabrous. Willugbaya, p. 739 

 cc. Erect herbs. 



* Tansy, escaped from gardens. 



