232 THE FLORA. 



2 H. panicula^tum. Panicled H. Stem leafy, widely panicled. Leaves fine-toothed 

 8 H. veno'sum. Euhin's Plantain. Stem almost leafless, corymbed, Lvs. entire. 



4 H, scabrum. Rovgh II. Heads corymbed. Plant stiff, rongh-liairy. 

 5 H. longip'ilum. Long-haired II. Plant clotlied with straight bristles V long. "W. 

 fi H. Grono'vii. Gronovius' H, Plant slender, quite hairy below. 



10. NAB'ALUS. Lioii's-foot. 



Involucre cylindrical, double, the inner of many linear scales in one 

 row, the outer of a few short scales at base. Receptacle naked. Achenia 

 smooth, striate, not beaked, crowned with a copious, straw-colored or 

 brownish hair-like pappus. — ^Erect herbs, with a thick, tuberous, bit- 

 ter root. Heads 5-18-floAvered, white or straw-colored, often purplish. 

 Aug. -Oct, 



* Heads glabrous, pendulous. Leaves multiform in the same plant a 



* Heads hairy, erect or nodding. Leaves reniform, undivided . . . .7-9 



a Tall (2-4f, high). Hea,ds (8-12-flowered) in a corymb-like panicle 1, 2 



a Tall (2-6f. higli). Heads in a long, raceme-like panicle 3, 4 



a Low (5-10'' high). Heads raeemed. Found only on high mountains.... 5, 6 



1 N. al'ba. White L. Pappus cinnamon-color. Leaves hastate, often lobed. 



2 N. Fra'seri. Frasev^s L. Pappus straw-color. Leaves deltoid, often cleft. 



3 N. altis'simus. Tall L. Heads 5-flowered. Leaves divided, or cleft, or entire. 



4 N. virga'tus. Rod L. Heads 8-12-flowered. Lowest leaves pinnatifid. 



5 N. na'nus. Dwarf L. Outer involucre of sliort-ovate, close scales. 



6 N. Boot'tii. BootVs L Outer involucre of linear, loose scales. 



7 N. racemo'sus. Raeemed L. Heads nodding, 9-12-flowered. W. M. 



8 N. crepidin'eus. Grepis L. Heads nodding, 25-35-flowered. W. S. 



9 N. as'per. RovgJi L. Heads erect, ll-14-flo\vcTed. Panicle raeemed. W, 



Order LXXI. LOBELIACEJE. Lobeliads. 



Herbs with alternate leaves, scattered ^(?w?er5, and often m\]kj juice ; 

 calyx superior ; corolla irregular, 5-lobed, tube split down to the base ; 

 stamens 5, united into a tube both by the filaments and anthers ; 

 ovarij adherent to the calyx tube ; styles united into one ; 

 stigma fringed ; fruit a 2-3-celled, many-seeded capsule. 



LOBE'LIA. Cardinal-flower. Indian Tobacco. 



The two upper lobes of the irregular corolla are smaller than the three 



