PLANTS OF SOUTHERN NEW JERSEY. 477 



e. Leaves regularly many-pinnate, flowers in a long, slender 

 cylindrical spike. Sangii'xsorha canadensis, p. 484 



ee. Leaves various, lower often 3-5 pinnate or entire, upper 

 generally 3-parted. 

 f. Receptacle of the fruit densely hairy. 



Geuni canadense, p. 482 

 ff. Receptacle of the fruit glabrous or nearly so. 



G. virginianum, p. 483 



OPULASTER Medicus. 



Opulaster opulifolius (L.). Ninebark. 



Spiraea opulifoUa Linnaeus, vSp. PI. 489. 1753 [Virginia and Canada]. — Barton 



I. 230. 1818. 

 Physocarpa opulifoUa Britton 92. 



River banks of the northern counties, following- down the 

 Delaware as far as Camden. 



Fl. — Late May to early June. Fr. — Mid-June to late June or 

 July, persisting into autumn. 



Middle District. — Bordentown (NB), Crosswicks Creek (C), Riverton, 

 Camden (P), Cooper's Creek (C), National Park. 



SPIR/EA L. 



Spiraea latifolia "Alton" Borkh. Meadow Sweet. 



Spircea latifolia "Alton," Borkhausen, Handbk. Forst. Bot. IL 1871. 1800 



[North America]. — Knieskern 13. — Britton 93. 

 SpircFa alba Barton, Fl. Phila. L 229. 1818. 



Edges of swamps or w^et meadows; rather frequent in the 

 northern counties, but rare southward mainly in the Middle 

 district and apparently entering the Pine Barrens only on the 

 borders and along streams. 



Fl. — ^Early July to late August. Fr. — Early September into 

 October. 



Middle District.— Farmmgdale, Brindletown, Florence, Center Square. 

 Pine Barrens. — Hanover, Above Atsion, Egg Harbor City, Mays Landing 

 (NB). 



Spiraea tomentosa L. Hardback. 



Spircea tomentosa Linnreus, Sp. PI. 489. 1753 [Philadelphia].— Knieskern 13. 

 — Willis 20. — Britton 93. 



Frequent in low grounds nearly throughout the State, but 

 apparently occurring in the Pine Barrens much as does the 

 preceding. 



