92 FLORA OF WORCESTER COUNTY. 



Viburnum [Tourn.] L. Arrow-wood. 

 alnifolium, Marsh. Hobble-bush. 



In rich woods, especially northward. 

 Opulus L., var. americanum (Mill.) Ait. Cranberry Tree. 

 In rich woods, Graf ton and northward. 

 acerifolium L. Arrow-wood. 



In dry woods and thickets, common, 

 dentatum L. Arrow-wood. 



In moist grounds, common, 

 cassinoides L. Withe-rod. 



In rich soil, in low grounds. 

 Lentago L. Sweet Viburnum. In rich soil. 



Sambucus (Tourn.) L. Elder. 



canadensis. Common Elder. In moist soil, common. 

 racemosa L. Red-berried Elder. 



In rocky places, especially northward. 



DIPSACACE^ (TEASEL FAMILY). 



Dipsacus (Tourn.) L. Teasel. 



sylvestris (Huds.). Wild Teasel. 

 South Worcester. 



Knautia L. 



arvensis (L.) T. Coulter. 

 Princeton. Mrs. H. S. Knight. 



CUCURBITACE^E (GOURD FAMILY). 



Sicyos L. One-seeded Bur-cucumber. 



angulatus L. In rich soil in moist places. 



Ecbinocystis T. and G. Wild Balsam-apple. 

 - lobata (Michx.) T. and G. In rich soil. 



