PLANTS OF SOUTHERN NEW JERSEY. 651 



Asclepias syriaca L. Common Milkweed. 



Asclepias syriaca Linnseus, Sp. PI. 214. 1753 [Virginia] .—Britton 169. 

 Asclepias cornuti Knieskern 25. 



Generally distributed in rich open ground, except in the Pine 

 Barrens, where it is strictly confined to cultivated and waste 

 ground and is obviously introduced. Everywhere, however, it is 

 largely a weed, and it is impossible at this time to ascertain just 

 what its native habitat may have been. 



PL — Mid-June to late July. 



Middle District. — Farmingdale, Burlington, Locust Grove (S), Medford 

 (S). 

 Pine Barrens. — Mays Landing. 

 Coast Strip.— St. Albans (L), Barnegat City (L). 

 Cape May. — Cold Spring (S). 



Asclepias verticillata L. Whorled Milkweed. 



Asclepias verticillata Linnaeus, Sp. PI. 217. 1753 [Virginia], — Pursh, Fl. Am. 

 Sept. I. 183.— Barton, Fl. Phila. 133. 1818.— Britton 170.— Keller and 

 Brown 261. 



In sandy or rocky places ; locally throughout the State. IVEost 

 frequent within our limits in the IVliddle district, but nowhere 

 common. Barton knew it only from a bog a quarter of a mile 

 north of Kaighns Point. In Pennsylvania it is a characteristic 

 plant of the serpentine barrens of Chester and Delaware Counties. 



Fl. — Early July to mid-August. 



Middle District.~B.olmdel (C), Red Bank (NB), Leedsville (C), Freehold 

 (C), Birmingham (C), Kaighns Pt., Medford, Clarksboro (P), Mickleton, 

 Berlin, Glassboro, Swedesboro, Oliphant's Mill (KB), Bridgeton, Millville 

 (KB). 



Pine Barrens. — Newtonville, Tuckahoe (S). 



Cape May. — One mile east Dias Creek. 



ACERATES Elliott. 

 Acerates viridiflora (Raf.). Green Milkweed. 



Asclepias viridiflora Rafinesque,, Med. Rep. (II.) 5. 360. 1808 [Maryland and 



Pennsylvania]. 

 Acerates viridMora Willis 50- — Keller and Brown 261. 



Open sandy ground or limestone cliffs; locally distributed in 

 the northern counties. Known within our limits only form 

 Black's Mills, IVlonmouth County, where it was obtained by the 

 Rev. Samuel Lockwood, according to Britton's Catalogue. It 



