244 
IOWA ACADEMY OF SCIENCES. 
494. P. purshii R. and S. (P. patagonica var. gnapha- 
lioides A. Gray.) Rare in dry soil east of 
Estherville. 
RUBIACE^E. 
Galium L. 
495. G. boreale L. Northern Bedstraw. Common near 
timber. 
496. G. triflorum L. Frequent in woods. 
497. G. tinctorium L. [G. trifidum Auc.) Low prairies; 
very common. 
498. G. trifidum L. (G. trifidum var. pusillum A. Gray.) 
Rare in marshes. 
499. G. concinnum Torr. and Gray. Shining Bedstraw. 
common in woods. 
VIBURNACEiE . 
Sambucus L. 
500. S. canadensis L. Black Elderberry. Frequent near 
timber, and along streams. Sometimes culti- 
vated. 
Viburnum L. 
501. V. pubescens (Ait.) Pursh. Downy-leaved Arrow- 
wood. Rare in dry woods along west fork of 
the Des Moines. 
502. V. lentago L. Black Haw. Common in open woods 
and along streams. The black edible fruit ripe 
in September. 
Triosteum L. 
503. T. perfoliatum L. Rare; in low woods. 
Symphoricarpos Juss. 
504. S. occidentalis Hook. Wolf -berry. Very common; 
margins of woods, along streams and gopher 
mounds on open prairies. 
Lonicera L. 
505. L. dioica L. (L. glauca Hill.) Bush Honeysuckle. 
Frequent in woods. 
