PLANiTS OF SOUTHERN NEW JERSEY. 385 



ff. Staminate flowers in pendant, pistillate in erect catkins., 



leaves finely and closely serrate. Betulacecs, p. 399 



fff. Staminate flowers only, in catkins, fruit inclosed in a bur. 



Fagacea, p. 402 

 ee. Petals present. 



/. Separate from one another. 

 g. Stamens 4-5. 



h. Flowers small, greenish, scattered along the 

 stem or in small racemes. 



i. Berries naked, red or black. Ilicacea, p. 539 

 M. Berries red, enclosed in a red or orange 

 splitting pod. Celastracea, p. 542 



hh. Flowers white. 



i. In slender elongated terminal racemes. 



Ilea, p. 472 

 ii. In umbel-like clusters forming a terminal 

 corymb. Ceanothus, p. 546 



gg. Stamens 8-10, flowers white. 



h. In flat terminal cymes. Hydrangea, p. 472 



hh. In long terminal spike-like racemes, fragrant. 



Clethra, p. 608 

 ggg. Stamens, numerous, petals five, white or pink. 



h. Fruit a follicle or achene, sometimes forming 

 a compound berry. Rosaces, p. 475 



hh. Fruit apple-like' with a central "core" contain- 

 ing seeds. Pomaces, p. 486 

 hhh. Fruit plum or cherry-like containing a hard 

 seed. Drupaces, p. 490 

 ff. Petals united. 



g. Leaves opposite, flowers small, white, in flat cymes or 

 yellow and tubular. Cabrifoliaces, p. 707 



gg. Leaves alternate, flowers pink or white, bell-shaped, 

 or tubular with flaring tips, or round cup-shaped. 



Briacea, p. 612 



HERBS OR HERBACEOUS VINES. 

 a. No leaves. 



6. Plants consisting of branched, jointed, cylindrcal, fleshy stems, 



flowers inconspicuou.s, inhabitants of salt marshes. Salicornia, p. 430 



hh. Plants consisting of irregular, oval, flattened joints, armed with 



spines; and large, showy yellow-petalled flowers. Opuntia, p. 573 



ao. Leaves present. 



b. Neither petals nor sepals present. 



c. Flowers several, minute, contained in an involucre, the sinuses of 

 which bear glands often with petal-like appendages. Staminate 

 consist of a single stamen and are placed around the inside of the 

 involucre. Pistillate flower central and exserted in fruit. Plants 

 with milky juice. Euphorbia, p. 527 



cc. Flowers not enclosed in an involucre. 

 25 MUS 



