}03] FLORA OF COLUMBIA AND VICINITY 261 



29. Leaves glabrous beneath; pappus purple. V. fasci- 

 CUlata Michx. [ V. ri/iissima DC, not Michx.]. West- 

 ern IRONWEED. Ohio and Michigan to South Da- 

 kota; Kentucky and Missouri to Texas. 



29a. As above, but with relatively broad and short leaves. 

 V. fasciculata corymbosa fSchweinitz) Daniels 

 [K. coiymiosii Schweinitz: V. Schweinitzii Steud.]. 

 CoRYMBED IRONWEED. Range of type. 



b. Jamesiae. Leaves smooth above, bracts acuminate or 

 acute. 



30. Leaves not exceedingly numerous and crowded, serrate. 

 V. tenuifolia Small. Slender-leaved ironweed. 

 Texas. 



31. Leaves not exceedingly numerous and crowded, entire. 

 V. marginata (Torr. ) Trelease [V. altissima mar- 

 ginata I'orr.: V. Jamesii T. & G.]. James's iron- 

 weed. Nebraska to Arkansas and Texas. 



32. Leaves exceedingly numerous and crowded. V. Lst- 

 termannii Engelm. Lettermann's ironweed. Ar- 

 kansas. 



c. AngUStifoliae. Leaves scabrous above. 



33. Uracts with slender-spreading tips. V. graminifolia 

 (Walt.) Trelease \_V. angustifolia Michx.: V. fascicu- 

 lata DC. not Michx.: Liairis umbellata Bertol.]. 

 Narrow-leaved ironweed. North Carolina and 

 Florida to Arkansas and Texas. 



34. Bracts with acute erect or appressed tips; leaves re- 

 motely toothed. V. Texana (Gray) Small [V. an- 



gustt folia Texana Gray]. Texan IROKWEED. Florida 

 to Arkansas and Texas. 



35. Bract-; with acute erect or appressed tips; leaves entire. 

 V. Blodgettii Small [V. angustifolia pumila 



Chapm.]. BlODGETT's IRONWEED. FLORIDA. 



d. Lindheimerae Plants white woolly. 



36. V. Lindheimeri Gray & Engelm. Lindheimer's 



IRONWEED. Texas. 

 B. RADICIFOLIAB. Leaves mainly basal. 



a. Oligophyllae. Stems naked, or with a few bract-like 

 leaves. 



37. V. ollgophylla Michx. [^Serratula CaroliniensisT>'\\\. •_ 



Chrv-ocoma acanlis Walt.: V. acaulis (Walt.) Gleason] . 

 FeW-LEAVED IRONWEED. NoRTH CAROLINA tO FLOR- 

 IDA. 



