574 REPORT OF NEW JERSEY STATE MUSEUM. 

 Order THYMELEALES. 



Family THYMELEACE^. Mezereon, etc. 



DIRCA L. 



Dirc'a palustris L. Leatherwood. 



Dirca palustris Linnaeus, Sp. PI. 3S8. i7S3 [ Virginia] .—Britton 213.— Keller 

 and Brown 230. 



Occasional in rich woods of the northern counties and at one 

 station within our limits.' 



Pi. — Early or mid- April, probably ; before the leaves. 



Middle District. — Two miles west Woodstown, Swedesboro (CDL), Salem 

 (H). 



Order MYRTALES. 



Family LYTHRACEvE. Loosestrife, etc. 



Key io the Species. 



a. Calyx tube campanulate, flowers regular. 



b. Flowers small axillary, low aquatic herbs. 



c. Capsule bursting irregularly. [Ammania koehneiY 



cc. Capsule splitting longitudinally. Rotala ramosior, p. 574 



hh. Flowers large, purple, in axillary cymes, forming whorls, plant an 



aquatic shrub. Decodon verticillatus, p. 575 



aa. Calyx tube cylindrical, flowers regular, purple. 



b. Flowers axillary, solitary. 



c. Leaves mostly alternate, flowers 6-10 mm. broad. 



Lythrum alatum, p. 576 

 cc. Leaves mostly opposite, flowers 3 mm. broad. 



Lythrum lineare, p. 575 

 bb. Flowers in panicled terminal spikes 12-16 mm. broad. 



[L. salicaria L.]' 

 aaa. Calyx tube tubular, flowers irregular, purple, plant viscid. 



Parsonia petiolata, p. 576 



ROTALA L. 



Rotala ramosior (L.). Rotala. 



Ammania ramosior Linnaeus, Sp. PI. 120. 1753 [Virginia]. — Britton 107. 

 Ammania humilis Barton, Fl. Phila. I. 91. 1818. — Willis 24. 

 Rotala ramosior Keller and Brown 230. 



' Occurs on the Hackensack Marshes. 



' Purple Loosestrife, wet meadows and swamps locally introduced. 



