558 REPORT OF NEW JERSEY STATE MUSEUM. 



Holgate's (L), Absecon (S), Ocean City (S), Wildwood. 

 Cape May. — Bennett (S), Cape May. 



Triadenum petiolatum (Walt.). Large Pink St. John's-wort. 



Hypericum petiolatum Walter, Fl. Car. 191. 1788 [S. Carolina]. — Britton 68. 

 — Keller and Brown 225. 



The occurrence of this species in New Jersey rests on a frag- 

 ment in the herbarium of the Philadelphia Academy labeled "near 

 Camden," from the herbarium of J. K. Potts. Torrey and Gray's 

 statement that it occurs in the State (Flora. N. A., i, 168) is no 

 doubt based on the same specimen. 



Family ELATINACE^. Waterworts. 



ELATINE L. 



Elatine americana (Pursh.). Waterwort. 



Peplis americana Pursh, Fl. Am. Sept. 238. 1814 [Pennsylvania]. 



Crypta minima Nuttall, Jour. Acad. Nat. Sci., Phila., I. 117. 1817. — [Shores 



of Delaware, above Phila.]. — Barton, Fl. Phila. I. 17. 1818. 

 Elatine Americana Britton 66. 



Reported on muddy shores of the Passaic River and Lake 

 Hopatcong; also on the Delaware at Camden and along the 

 upper coast and in the Pines. 



PL — Early July well into autumn. 



Middle District. — Camden, in mud, Delaware river (P). 

 Coast Strip. — Bayhead, Spring Lake, Pt. Pleasant.* 



Pine Barrens. — Lakehurst (Mackenzie), 8 miles south of Manchester (P), 

 Ferago Pond (C). 



Family CISTACE^. Rock-rose, etc. 

 Key to Species. 



a. Petals 5, yellow, showy. 



b. Leaves lanceolate or oblong, flowers 15-30 mm. broad. 



c. Petaliferous flowers S-12, in a short terminal cymose raceme, their 

 capsules 3-4 mm. long, little, if at all, surpassed by later branches ; 

 capsules of later apetalous, flowers i mm. in diameter. 



Hclianthemum majus, p. 559 

 cc. Petaliferous flowers 1-2, their capsules 6-8 mm. long, much over- 

 topped by later branches, capsules of apetalous flowers often 3-4 

 mm. in diameter. H. canadense, p. 560 



bb. Leaves subulate or scale like, imbricated ; flowers about 8 mm. broad, 

 plant 1-2 dm. high. 



* The record for Wenonah (Githens) in Keller and Brown's list has not 

 been verified. 



