ION Rhodora [August 



SOME RARE PLANTS FROM KNOX COUNTY, MAINE. 



C. A. E. Long. 



In addition to the noteworthy Matinicus plants which I have 

 previously listed in Rhodora, the following, collected during 1020, 

 will be of interest. 



AllELANCHIER canadensis (L.) Medic. This is the true .1. cana- 

 densis according to Wiegand's treatment. 1 Common in New York 

 and southward and southwcstward, hut very rare in Maine and 

 eastern New England. It is frequent, here on the island. I find it 

 growing as a low irregular shnil) along old stonewalls and on rocky 

 hillsides, and in a more arborescent form where the soil is deeper 

 and richer. Our other shadbushes are A. oblongifolia (T. & G.) 

 Roem. and A. laevis Wiegand, as well as hybrids between the two. 



Cares Oederi Retz. The typical form of the species. Rare in 

 Maine. Quite abundant in one locality. 



JUNCUS BUFONIUS L., var. CONGESTUS Wahlb. Rare in Maine. 

 Growing at sandy edge of seashore. 



Polygonum Fowler] Robinson. A northern species, very rare 

 in Maine. Gravelly beach. 



SAGINA nodosa (L.) Een/,1. The typical smooth form. Another 

 northern plant, which reaches its s uthernmost known station here. 

 Its previous southern limit was at Cutler, Maine. 



Helianthub scaberrimus Ell. A western sunflower probably 

 escaped from cultivation and long established in a waste corner. 



Helianthus PETIOLARI8 Nutt. A few vigorous plants in an 

 abandoned chicken-run. Probably introduced in so-called "scratch 

 feed." 



TragOPOGON PORRIFOLIU8 L. Established for many years, and 

 thoroughly naturalized in grassland. 



On a few collecting trips in other parts of the county, notably 

 Rockland and Rockport, I made some interesting collections. These 

 towns contain many lime quarries, and while the soil may not he as 

 fertile as in some other limestone districts of the state, there is an 

 attractive Mora, as the following list will show. 



1 Riiodoba xiv. 150 (1921.) 



