T r e e s  o f  N o r t h  C a r o l i n a

A n g i o s p e r m s  ( f l o w e r i n g  p l a n t s )

L e a v e s  o p p o s i t e,  s i m p l e,
u n l o b e d ,  t o o t h e d

Linear key | Dichotomous key

1. Leaves evergreen, margins spinose...Osmanthus

1. Leaves deciduous, margins toothed, but not spinose...2.

2. Stellate  trichomes present on vegetative parts...Viburnum

2. Trichomes of vegetative parts all simple, not stellate...3.

3. Fruit a capsule, dehiscent...Euonymus

3. Fruit a drupe or multiple of drupelets, indehiscent...4.

4. Calyx conspicuous, becoming pink or purple in fruit, lobes longer than the drupes; petals ca. 2 cm long...Clerodendrum

4. Calyx inconspicuous, greenish in fruit, distinctly shorter than the drupes or drupelets; petals absent or to 0.5 cm long...5.

5. Leaves harshly scabrous on the upper surface; fruit a multiple of drupelets; leaf venation pinnate but irregular...Broussonetia

5. Leaves not scabrous; fruit a 2-4-seeded drupe; leaf venation neatly pinnate, the lateral veins nearly straight and parallel to one another...6.

6. Winter buds naked, pubescent; flowers perfect, sepals, stamens, and petals 5; style undivided; leaves with 8-10 lateral veins on either side of the midvein...Frangula

6. Winter buds with bud scales; flowers functionally unisexual, sepals and stamens 4 or 5 (the stamens rudimentary in the pistillate flowers), petals 0 or 4 (never 5); style divided 1/3 to 2/3 its length into 2, 4 or 5 segments; leaves with (2-) 3-9 lateral veins on either side of the midvein...Rhamnus