PLANTS OF SOUTHERN NEW JERSEY. 6oi 



HERACLEUM L. 

 Heracleum lanatum Michx. Cow Parsnip. 



Heracleum lanatum Michaux, Fl. Bor. Am. I. i66. 1803 [Canada].— Britton 

 118. 



Frequent in swamps of the northern counties, descending into 

 our limits rarely, along the Delaware River. 



Pi — Early May to early June. Fr. — Mid-June to mid-July. 

 Middle District. — Crosswicks, Camden. 



Family CORNACE^. Dogwoods. 

 Key to the Species. 



a. Flowers four parted, perfect, petals present. 



b. Flowers greenish yellow, surrounded by four white obovate petal- 

 like bracts 26-60 mm. long; fruits red. A tree. Cornus Horida, p. 601 

 bb. Flowers white in flat terminal cymes, no involucres. Shrubs. 

 c. Leaves opposite. 



d. Branchlets, stalks and lower surface of the leaves downy, 

 often rusty; fruit blue, leaves ovate or elliptic. 



C. anionmm, p. 602 

 dd. Branchlets smooth, gray; leaves whitish beneath, not downy, 

 ovate lanceolate, taper pointed ; fruit white. 



C. paniculata, p. 603 

 cc. Leaves alternate, clustered at the ends of the branches. Branch- 

 lets greenish streaked with white, leaves ovate or oval, whitish 

 and minutely pubescent beneath, fruit white. C. alternifolia, p. 603 

 aaa. Flowers greenish, five parted, dioeciously polygamous, petals very 

 minute or wanting; fruit bluish-black; leaves oval, glabrous and 

 shining. Nyssa sylvatica, p. 603 



CORNUS L. 



Cornus florida L. Flowering Dogwood. 



Cornus florida Linnxus, Sp. PI. 117. 1753 [Virginia]. — Knieskern 16. — 

 Britton 120. — Stone, Bartonia I. 23. 1909. 



Common in woods of the North and Middle districts, and 

 occasional in the Coastal Strip and Cape May peninsula. 



All through northern and western New Jersey the Dogwood 

 is one of the most conspicuous trees of the woodland in spring 

 time. Just as the countryside is tinged with the soft green of 

 opening leaves and the yellow of the oak catkins, the great in- 

 volucral bracts of the Dogwood, which pass popularly as petals, 



