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

Aesculus L. (Sapindaceae)

A genus of about thirteen species of trees and shrubs; of temperate North America, e. Asia, and se. Europe.

Four or five species occur in North Carolina.

Key to Aesculus in North Carolina

1. Petals usually 5, white with a reddish mark near the cordate base of the petal blade; buds glutinous (sticky); fruit spiny; leaflets 7 (-9) per leaf...*A. hippocastanum (Horsechestnut)

1. Petals 4 (or 4-5 in A. parviflora), cream-colored, yellow, red; or white (and then lacking a red blaze); buds not glutinous; fruit smooth (or with some prickles in A. glabra var. glabra); leaflets 5 (-7) per leaf; [native]...2.

2. Stamens about 2× as long as the petals, well-exserted beyond the corolla; petals only slightly unequal in size; fruit spiny with short prickles (rarely essentially smooth)...A. glabra var. glabra (Ohio buckeye)

2. Stamens about 1× as long as the petals, included or barely exserted beyond the corolla; petals markedly unequal in size;
fruit smooth...3.

3. Petal margins stipitate-glandular; petals scarlet; fruits 3-6 cm in diameter...A. pavia (Red buckeye)

3. Petal margins villous, not glandular; petals yellow; fruits 2-8 cm in diameter...4.

4. Calyx and pedicels stipitate-glandular; large tree; petiolules 2-3 (-4) mm long; fruits 5-8 cm in diameter...A. flava (Yellow buckeye)

4. Calyx and pedicels puberulent; shrub to small tree; petiolules 3-12 mm long; fruits 2-4 cm in diameter...A. sylvatica (Painted buckeye)