PLANTS OF SOUTHERN NEW JERSEY. 605 



fff. Leaves opposite. 



g. Reduced to mere appressed scales. Bartonia, p. 642 



gg. Somewhat fleshy, clustered at the end of the short 



stem, 6-1 5 cm. tall. Flowers and whole plant 



purplish, lower leaves scale-like. Obolaria, p. 643 



ggg. Leaves normally developed. 



h. Abruptly narrowed to winged connate per- 

 foliate base, flowers axillary. Triosteum, p. 711 

 hh. Leaves not narrowed to a perfoliate or clasp- 

 ing base. 

 i. Flowers yellow. 



y. Leaves serrate. Diervilla, p. 712 



jj. Leaves entire. 



k. Flowers in a terminal, spike-like 

 raceme. Lysiinacliia, p. 631 



kk. Flowers in axillary fascicles on 

 long, slender pedicels. 



Steirofiema, p. 632 

 ii. Flowers blue. 



y. Stamens exserted. Trichostema, p. 664 

 jj. Stamens not exserted. 



k. Plant low, 7-18 cm., corolla 8-12 

 mm. broad, basal leaves spatulate, 

 upper small oblong sessile. 



Houstonia, p. 701 

 kk. Plant over 20 cm. tall, corolla 25 

 mm. long or more. Gentiana, p. 640 

 Hi. Flowers neither pure blue nor yellow. 

 y. Leaves serrate. 



k. Flowers in whorls, often forming 

 interrupted terminal spikes, flowers 

 purple. Mentha, p. 673 



kk. Flowers in long, slender spikes, 

 axillary and terminal flowers violet 

 or white. Verbena, p. 660 



yy. Leaves entire. 



k. Plants low, prostrate or trailing. 



RuhiacecB, p. 700 

 kk. Plants erect. 



/. Flowers star-like, bright pink 



or white. Gentianacece, p. 638 



//. Flowers small, bell shaped, 



white, tinged with pink or 



greenish, juice milky. 



Apocynum, p. 645 



///. Flowers with reflexed sepals 



and a rotate crown of five 



hooded bodies on the tube of 



the stamens, juice milky. 



Ascelepias, p. 646 



