FLOKA OF THE DISTRICT OF COLUMBIA. 



263 



1. Campanula aparinoides Pursh. Marsh bellflower 

 Swale3 and grassy borders of swamps; known from half a dozen localities, but 



easily overlooked. July. Eastern N. Amer. 



2. Campanula rapunculoides L. 



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



Eur. 



3. Campanula americana L. 



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

 ern N. Amer. 



150. LQBELIACEAE. 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 - ' a a * 



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 

 leafv 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 *• L • syphilitica. 



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

 1 5-2 cm Ion*; auricles of calyx short and rounded, if present. 



5. L. puberula. 



, ,, ,. ,. t Cardinal flower. 



1. Lobelia cardinalis L. ^ 



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



Amer. 



. _ . .. . „ .„ T Indian tobacco. 



2. Lobelia inflata L. 



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. 



, ,_ , . nMM t Great lobelia. 



4. Lobelia syphilitica L 



Low situations, especially near streams; not uncommon. Aug.-bept. past- 

 ern U. S. 



5. Lobelia puberula Michx. 



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

 Sept. Eastern U. S. 



151. CICHOJtIACEAE. 1 Chicory Family. 



Flowers blue, purple, or rarely clear white. . 



Flower heads sessile; pappus of numerous very short, stiff, ^P^CICHOEIUM. 



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



8. LACTTJCA. 



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



