HITCHCOCK PLANTS OF AMES, IOWA. 499 



LlATKIS CYLINDRACEA, Micbx. Fl. 



Prairie ; frequent. 

 L. scariosa, (L.) Willd. Spec. iii. p. 1635. — Scrratula scariosa, 

 L Spec. 



Prairie ; abundant. 

 L. pycnostachya, Michx. Fl. 



Low prairie : abundant. 



BOLIDAGO. 



# Inflorescence in the axils of feather-veined leaves. 



S. L ATI FOLIA, L. Spec. 



Rich woods ; frequent. 



Stem smooth, angled, more or less zigzag; leaves ovate, large and thin, or upper 

 smaller and lanceolate, all tapering into margined petioles, sharply and deeply ser- 

 rate, pubescent beneath. 



* * Inflorescence a terminal panicle. 

 ■*- Leaves not triple- ribbed. 

 ++ Racemes not secund. 



vS. spectosa, Nutt., var. angustata, Torr. & Graj-, Fl. ii. p. 205. 



Prairie; infrequent. 



Stems strict, 2 to 3 feet high; leaves entire or nearly so, lower spatulate, upper 

 narrowly elliptical, becoming small and bract-like in the inflorescence. 



True 5. spectosa, Xutt. is abundant in eastern Iowa, but I have not seen it here. 

 It should be sought along the borders of upland woods. 



++ ++ Racemes secund. (5. tiemoralis might be sought here.) 



B. ulmifolia, Muhl. in Willd. Spec. iii. 

 Woods; common. 



Leaves thin, elliptical, pointed at both ends, sharply serrate, or sometimes the 

 upper entire; branches of panicle long, slender and recurving. Quite variable. (For 

 note on S. lateriflora, Ait., see Gray, Proc. Amer. Acad. xvii. p. 180.) 



-i- +- Leaves more or less triple-ribbed. 

 ++ Stem smooth, at least up to panicle. 



S. MiSSOURlENSIS, Nutt. Jour. Acad. Phil. vii. 1834. 

 Prairie; common. 



Low, seldom more than 2 feet high; glabrous throughout; leaves narrow, thick 

 and rather rigid, entire or sparingly denticulate. Flowering- earlier than the other 

 species. 



3. 3EBOTINA, Ait. Hort. Kew. 



Open ground or along fences and roadsides; common. 

 Tall, glabrous up to the ample panicle; leaves large and sharply serrate. 



Var. gigantea, (Ait.) Gray, Proc. Amer. Acad. xvii. 1682.— 

 •S. gigantea, Ait. Hort. Kew. 

 Open ground; not uncommon. 

 Around North Hall and elsewhere. Leaves more or less pubescent beneath. 



