69 



llicir leiigtli, terminated by one blue flower, wbicli appears in August 

 and Sopteinl)cr. 



In the leiuh species the slcins arc five feet high, skiider, angular, 

 smoolli, but not branching much; the leaves allernale, not very 

 rough ; the flowers lermiual, solitary, small, and while;' the peduncles 

 have very small subulate leaflets scattered over them. 



The eleventh has ih.e stems slender, three I'eet high, with slendc r 

 side blanches most of their length, so as to ftjrni a thick bush; tliey 

 are terminated by single tlowers.'- ■■,■'■■■ : • r 



The twelfth species has the stems upright, two feet liij2;h, full of 

 1)ranclies, uhich are filiform ; the stem-leaves being narrow-lance- 

 olate; on the branches linear: the peduncles filiform, striated, one- 

 flowered, with very narrow leaflets on them; tlie flowers small, with 

 an erect, imbricate, loose calyx; the ray copious, and white; the 

 disk yellow, with lower flowers. 



The thirteenth species rises four feet high ; the flowers arc pale 

 blu(\ appearing aljout Michaelmas. The whole [)lant is lomentose, 

 especially the leaves and calyxes. The raceme simple, Avith very 

 short peduncles, it is ;i native of Virginia. . ' ' ' .■ - .. I 



'J'he lilicenth s[)ccies has the slcu) obscurely furrowed, of a pale 

 red, not very erect, but irregularly llexuose, corymbosely branched, 

 the branches divaricate and much divided; the leaves of the same 

 foru), sometimes having a single serrature, the edge scal^rous, if the 

 finger be drawn toward the base, the surface rough with invisible 

 hairs; the flowers rather solitary, somewhat small, on long, scaly, 

 yellow peduncles; scales of the calyx distant, in five rows; disk of 

 the corolla yellow; ray pale blue, revolule; the height near four 

 feet, having broad leaves at the bollom, which diminish gradually to 

 the top. The flowers ai)[)ear at the latter end of August. It is a 

 native of Virginia. 



The sixteenth lises to the height of four (cv.\, the stems putting 



out side branches towards the top, which grow erect, forming a loose 



spike of large blue flowers, expanding about the end of October. It 



is a native of North America. 



- Tlwi seventeenth species has the steins three feet high, Mith side 



