10 JUGLANDACEAE. 



base: staminate aments 5-10 cm. long: fruits 5-8 cm. in diameter: nut 

 4-celled below the middle, sculptured, the ridges thick, firm. — Spr. 



The Black-walnut grows in rich calcareous soil, in company with other decidu- 

 ous trees, in western Florida. The heart-wood is dark-brown, rather coarse- 

 grained, and durable. (Cont.) 



2. HICORIA Eaf. Bark close or scaly. Pith solid. Leaflets involute 

 in vernation. Staminate aments branched. Anther-connective inconspicuous. 



— Spr. HiCKOET. 



Lateral leaflets mostly falcate : bud-scales valvate. 



Leaflets mostly over : blades glabrous : nuts corrugated. 1. H. aquattca. 



Leaflets mostly less than 9 ; blades pubescent beneath : nuts 



smooth. 2. H. cordiformis. 



Lateral leaflets not falcate : bud-scales imbricate. 



Husk of the fruit freely separating in 4 woody valves at 

 maturity. 

 Bark of the trunk close, but rough : foliage scurfy or 

 pubescent. 

 Leaflets scaly beneath : middle calyx-lobe not bearded 



at the tip. 3. //. pallida. 



Leaflets stellate-pubescent beneath : middle calyx-lobe 



bearded at the tip. 4. H. alha. 



Bark of the trunk shaggy, separating in long plates : 



foliage glabrous. .5. H. ovata. 



Husk of the fruit tardily 4-valved to about the middle, tough. G. H. glabra. 



1. H. aquatica (Michx. f.) Britton. Tree becoming 30 m. tall, the bark 

 flaky: leaflets 9-13, the blades of the lateral ones lanceolate, 5-15 em. long, 

 falcate : fruits subglobose, but beaked, 2.5-3 cm. thick, the thin husk tardily 

 4-valved: nut corrugated, thin-shelled, the seed bitter. 



The Water-hickory grows in river swamps in northern Florida and the 

 northern i)art of the peninsula. The brown heart-wood Is relatively soft and 

 brittle. Also known as Swamp-hickory, Water bitter-nut and Bitter-pecan. (Cont.) 



2. H. cordiformis (Wang.) Britton. Tree becoming 30 m. tall, the bark close, 

 with shallow furrows and flat ridges: leaflets 5-9, the blades of the lateral 

 ones lanceolate or oblong-lanceolate, 8-15 cm. long, falcate: fruits subglobose, 

 2.5-3 cm. long, slightly 6-ridged, the thin husk tardily 4-valved: nut smooth, 

 thin-walled, the seed bitter. [H. minima (Marsh.) Britton.] 



The Bitter-nut grows in low grounds in western Florida. The brown heart- 

 wood is hard and tough. Also known as Swamp-hickory. (Cont.) 



3. H. pallida Ashe. Tree becoming 35 m. tall, the pale bark very rough: 

 leaflets 7-9, the blades of the lateral ones lanceolate to ovate-lanceolate, 5-16 

 cm. long, scaly-scurfy beneath: staminate aments slender, 8-12 cm. long: 

 fruits subglobose, oval, or obovoid-pyriform, 4-5 cm. long, the husk relatively 

 thin: nut smooth, rather thick-shelled. 



The Pale-itickory grows in dry soil in western Florida. The brown heart- 

 wood is hard and very tough. {Cont.) 



4. H. alba (L.) Britton. Tree becoming 30 m. tall, the bark with flat ridges: 

 leaflets 7-9, the blades of the lateral ones oblong or oblong-lanceolate, 8-15 

 cm. long: staminate aments stout, 10-15 cm. long: fruits globose-obovoid. 

 4-6 cm. in diameter, the husk very thick: nut angled, thick-shelled, the seed 

 sweet. 



The Mocker-nut grows in rich soil in northern Florida and the upper portion 

 of the peninsula. The dark-brown heart-wood is hard and tough. Also known 

 as White-heart hickory- (Cont.) 



5. H. ovata (Mill.) Britton. Tree becoming 40 m. tall, the bark separating 

 in large plates: leaflets 5, or rarely 7, the blades of the lateral ones oval to 

 oblong-lanceolate, 10-15 cm. long: staminate aments slender, 8-12 em. long: 

 fruits subglobose, 3-5 cm. thick, the husk thick: nut slightly angled, thin- 

 shelled, the seed sweet. 



The Shell-bark grows in rich soil in western E^lorida. The light-brown heart- 

 wood hard and very tough. Also known as Shag-bark hickory. (Cont.) 



