HiOKA OF THE DISTRICT OF COLUMBIA. 263 



1. Campanula aparinoides Pursh. Marsh bellt-lower. 

 Swalea and grassy borders of swamps; known from half a dozen localities, but 



easily overlooked. July. Eastern N. Amer. 



2. Campanula rapunculoid.es L. 



Old hedgerows and neglected ground; not common. July- Aug. Natiu-alized from 

 Eur. 



3. Campanula americana L. 



Moist alluvial shaded situations; common along the upper Potomac. July. East- 

 ern N. Amer. 



150. lOBEWACEAE. lobelia Family. 



1. LOBELIA L. Lobelia. 



Flowers bright red (rarely white); corolla tube 2 cm. long or longer..!. L. cardinalis. 

 Flowers blue; corolla tube 4-15 mm. long. 



Stems branched; pods much inflated 2. L. inflata. 



Stems usually simple; pods not inflated. 

 Flowers not over 1 cm. long, borne in a very slender, long, wandlike, erect raceme; 

 larger leaves mostly basal, the upper stem leaves few, reduced, scattered. 



3. L. spicata. 



Flowers 2-2.5 cm. long, borne in stout, often dense, racemes; stems conspicuously 



leafy throughout. 



Leaves 5-25 cm. long, thin, acute at both ends, sparingly pubescent, the hairs 



•few and stiff; flowers 2-2.5 cm. long; calyx with conspicuous deflexed 



auricles between the lobes 4. L. syphilitica. 



Leaves not more than 5 cm. long, thick, obtuse, densely puberulent; flowers 

 1.5-2 cm. long; auricles of calyx short and rounded, if present. 



5. L. puberula. 



1. Lobelia cardinalis L. Cardinal flower. 

 Moist situations, in partial shade; not very common. Aug.-Sept. Eastern N. 



Amer. 



2. Lobelia inflata L. Indian tobacco. 

 Dryish fields and thickets; common. Aug.-Sept. Eastern N. Amer. 



3. Lobelia spicata Lam. 



Damp or dryish situations, usually in thin shade; common. May-June. Eastern 

 N. Amer. 



i. Lobelia syphilitica L Great lobelia. 



Low situations, especially near streams; not uncommon. Aug.-Sept. East- 

 em U. S. 

 6. Lobelia puberula Michx. 



Moist meadows or open swamps in sandy soil; common, chiefly eastward. Aug.- 

 Sept. Eastern U. S. • 



151. CICHO^IACEAE.i Chicory Family. 



Flowers blue, purple, or rarely clear white. 

 Flower heads sessile; pappus of numerous very short, stiff, simple bristles. 



1. CICHORITIM. 

 Flower heads stalked; pappus of long, soft, simple or plumose bristles. 



8. LACTTJCA. 



1 See the explanation of flower structure under Asteraceae (p. 268). 



