440 



Caryophyllaceae 



Cerastium 



Map 901 



.erastium vulgatum var. hirsutum 

 f. glandulosum (BoennJ Druce 



50 



Map 902 



erastium arvense L. 



6 50 



Map 903 



Cerastium viscosum L. 



included many forms. Some European authors have divided this species 

 complex into several subspecies. American authors have divided it into at 

 least 4 varieties while others do not divide it. Cerastium arvense var. 

 oblong if olium has been reported from Indiana but the habitat ascribed to 

 this variety precludes its appearance in Indiana. This variety is not well 

 described so I am omitting it. Fernald & Wiegand in their article cited at 

 the beginning of this genus said the species is a complex which they were 

 not willing to divide. It is probable that when a larger series of specimens 

 and more notes are at hand the forms can be delimited. 



In Indiana there are two well-defined forms and it seems best to assign 

 one to the species and separate the other from it. I have included under 

 the species name our larger and glandular plant which has the distribution 

 shown on the map. These plants were found in large colonies on the allu- 

 vial banks of the Mississinewa, Salamonie, and Wabash Rivers. The two 

 northern locations belong to the glabrous form of the species. 



The species and its varieties are found in the northern hemisphere around 

 the world. 



Cerastium undetermined. I have two specimens of this form which 

 I found on high, wooded and gravelly banks of the St. Joseph River in 

 Elkhart and St. Joseph Counties. This plant is strikingly different and has 

 a dry soil habitat instead of a moist one. It is represented by my nos. 38515 

 and 38540. 



3. Cerastium viscosum L. Mouse-ear Chickweed. Map 903. There 

 are reports of this species from all parts of the state while the few speci- 

 mens I have are from the southern part. From the number of wrongly 

 determined specimens in our herbaria I think most authors did not under- 

 stand the keys in our manuals and all reports should be evaluated on the 

 basis of this experience. 



My specimens are from fallow and pasture fields and open woodland. 



Nat. of Eu., N. B. to Ont., southw. to Fla., Tex., and southw. 



4. Cerastium nutans Raf. {Cerastium longipedunculatum Muhl.) 

 Nodding Chickweed. Map 904. This species has also been reported from 



