94 JUGLANDACEAE. 



2. CEBOTHAMNUS Tidestrom. Dioecious shrubs. Leaf -blades entire or 

 merely toothed. Pistillate aments not bristly. Fruit globose, drupe-like, with 

 a fleshy waxy epicarp. 



1. C. carolinensis (Mill.) Tidestrom. Shrub 1-3 m. tall: leaf -blades elliptic, 

 oblong, oblanceolate, or obovate, 2-10 cm. long, shallowly toothed toward the 

 apex: staminate aments 1-1.5 cm. long: nuts 4-5 mm. in diameter. M. 

 Eare, in the Dillerville swamp. Limestones. Spr. BAYBERRY. WAX- 

 MYRTLE. MYRTLE. 



Order JUGLANDALES. 



Aromatic trees. Leaves alternate, exstipulate : blades pinnate. Flowers 

 monoecious, the pistillate in lateral aments on the twigs of the preceding 

 year, with a 2-6-lobed calyx bearing several rows of stamens, or the calyx 

 obsolete. Pistillate flowers terminal, consisting of an involucrate incom- 

 pletely 2-4-celled gynoecmm: calyx partially adnate to the gynoecium. 

 Fruit drupe-like, the nut enclosed in an indehiscent or dehiscent husk. 

 Seed oily. 



FAMILY 1. JUGLANDACEAE. WALNUT FAMILY. 



Aromatic trees with hard wood. Leaves with unequally pinnate 

 blades. Staminate aments solitary or clustered. Involucre of the fruit 

 dry or juicy. 



Staminate aments stout, simple, sessile or short-stalked: husk indehiscent: nut 

 sculptured 1. JUGLANS. 



Staminate aments slender, branched, long-stalked : husk dehiscent : nut 



not sculptured 2 HICORIA. 



1. JUGLANS L. Bark furrowed. Pith in plates. Leaflets conduplicate 

 in vernation. Staminate aments simple : anther-connective conspicuous. Spr. 

 WALNUT. 



Anther-connective a round tip : fruit elongate, viscid-pubescent : nut 4-angled. 



1. J. cinerea. 

 Anther-connective crown-like : fruit round, glabrous : nut not angled. 2. J. nigra. 



1. J. cinerea L. Tree becoming 30 m. tall, the heart -wood pale: leaflets 11-17; 

 blades lanceolate to oblong-lanceolate or oblong, 6-12 cm. long: staminate 

 aments 6-15 cm. long: fruits 8-12 cm. long, usually acute: nut 2-celled below 

 the middle, the ridges thin and brittle. Common, in woods and on rocky hill- 

 sides. BUTTERNUT. WHITE-WALNUT. 



2. J. nigra L. Tree becoming 50 m. tall, the heart -wood dark-brown: leaflets 

 15-23; blades ovate to ovate-lanceolate, 8-10 cm. long, rounded or subcordate 

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

 4-celled below the middle, sculptured, the ridges thick, firm. Common, in rich 

 soil. BLACK-WALNUT. 



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

 vernation. Staminate aments branched. Anther-connective inconspicuous. 

 Spr. HICKORY. 



Bud-scales valvate : lateral leaflets mostly falcate. 1. H. cordiformis. 



Bud-scales imbricate : lateral leaflets not falcate. 



Middle lobe of the staminate calyx much longer than the 

 lateral : husk of the fruit freely splitting to the base. 

 Bark close, but rough : foliage scurfy or pubescent. 2. H. alba,. 



Bark shaggy, separating in long plates : foliage glabrous 

 or puberulent. 



