Spring Flora of Oklahoma 
17 
II. HICORIA Raf. 
Leaflets serrate. Staminate catkins usually in 3’s on 
a common peduncle, or sometimes sessile at the base of 
the growth of the season; calyx 2-3-parted. Stamens 3-10, 
filaments short. Pistillate flowers 2-5 in terminal clus¬ 
ters. Calyx 4-parted. Petals none. Styles 2 or 4, fringed. 
Fruit somewhat globular, husk separating more or less 
completely into 4 valves. Nut smooth or angled. 
Bud scales few, valvate; lateral leaflets lanceolate or 
oblong-lanceolate, falcate. 
Nut not compressed or angled; seed sweet. 
1. H. Pecan. 
Nut somewhat compressed or angled; seed intensely 
bitter. 
Leaflets 5-9; nut smooth. 2. H. cordiformis. 
Leaflets 9-13; nut angled. 3. H. aquatica. 
Bud-scales imbricate; lateral leaflets not falcate. 
Husk of the fruit freely splitting to the base; bract 
* of the staminate calyx at least twice as long as 
the lobes. 
Bark shaggy, separating in long plates; foliage 
glabrous or puberulent. 
Leaflets oval to oblong-lanceolate, puberulent. 
4. H. ovate. 
Bark close, rough; foliage very pubescent and 
fragrant. 
Rachis of the leaves and staminate catkins 
densely hirsute. 5. H. alba. 
Husk of fruit not freely splitting to the base; bract 
of the staminate calyx about as long as the lobes. 
6. H. glabra . 
1. Hicoria Pecan (Marsh) Britton. Pecan. Minutely downy, 
becoming nearly smooth. Leaflets 9-17, ovate-lanceolate, tapering 
gradually to a slender point, falcate, serrate. Nut olive-shaped. 
River bottoms. Common. April-May. 
2. Hicoria cordiformis (Wang.) Britton. Bitter-nut. Swamp 
Hickory. A slender tree, the bark close and rough. Bud-scales 6-8, 
small, valvate, caducous, young foliage puberulent, becoming nearly 
