202 COMPOSITAE 



6. H. hirsutua Rat. l°-6° high, bristly-hirsute to nearly glabrons : 

 leaves very variable in size, entire or serrate, very rough above, rough- 

 pubescent beneath : involucral scales loose, ciliate. — Dry woods through- 

 out. Very abundant in the southern part. July-September. 



7. H. petiolaris Nutt. l°-6° high, strigose-hispid : leaves ovate- 

 lanceolate, entire or denticulate, rough : involucral scales lanceolate, 

 canescent. — Frequently introduced along railroads and in waste places. 

 Apparently native along the Missouri Eiver. July-October. 



8. H. annuUB L. 2°-15° high, scabrous : leaves broadly ovate, serrate, 

 rough : heads 3'-12' broad : involucral scales ciliate. — In waste places, 

 especially abundant around Kansas City. July-October. 



9. H. tnbercsus L. 4°-12° high, hirsute : leaves ovate-oblong, ser- 

 rate, petioled, rough above, pubescent beneath. — In low grounds through 

 out, running into bat much less common than 



Var. aubcanescens A. Gray. Leaves white-canescent beneath. — 

 Abundant in low grounds. July-October. 



28. VERBBSINA L. Crown Beard. 



Involucral bracts imbricated in a few series. Ray flowers pistillate or 



neutral. Bisk flowers perfect. Leaves decurrent. 



Stems l°-2° high, whitish-canesoent. 1. V. encelioides. 

 Stems 3°-8° high, not whitish-canescent. 



Leaves densely hairy beneath. 2. V. Iielianthoides. 



Leaves slightly appressed-pubescent beneath. 3. V. alternifolia. 



1. V. eacelioidea (Cav. ) A. Gray. Annual : leaves ovate-lanceolate 

 petioled : heads V broad : involucral scales canescent, erect. — Found as 

 a waif along roads northeast of Independence and at Courtney. May-June. 



2. V. taelianthoides Michx. Perennial : leaves ovate, sessile, serrate : 

 stem strongly winged : heads 2''-3'' broad : involucral scales rough, 

 erect. — Occurs locally' in dry woods near Tarnsey, Lee's Summit and 

 Westport. June-September. 



3. V. alternifolia (L.) Britton. Perennial : leaves lanceolate, short- 

 petioled, serrate : stem winged : heads 12''''-20''' broad : disk globose : 

 involucral scales much shorter than the flowers, soon deflexed. — Common 

 in rich woods. 



29. COREOPSIS L. Ticksekd. 



Involucral bracts in two series, the outer spreading, the inner broader 

 and appressed. Ray flowers neutral. Disk flowers perfect. 



Rays entire. 1. C. tripteris. 

 Rays 3-5-toothed. 



Leaves 3-lobed. 2. C. palmata. 

 Leaves pinnately parted. 



Rays pure yellow. 3. 0. grandifiora. 



Rays brownish at base. 4. C. tirutoria. 



1. C. tiipteria L. Glabrous perennial, 4°-8° high : leaves petioled, 

 pinnately divided into 3-5 lanceolate entire leaflets : pappus none. — Not 



