732 ARBORETUM ET FRUTICETUM BRITANNICUM. 
Ca‘ryva Nutt. ‘Flowers monecious. Stamens 4—6. Covering.of the nut in 
4 pieces. 
Preroca’Rya Kunth. Flowers monecious. Stamens numerous. Covering 
of the nut winged. 
Genus I. 
JUGLANS LE, Tur Watnut Tree. Lin. Syst. Monce'cia Polydndria. 
Identification. Schreb. Lin. Gen., No. 1446. ; Nutt. Gen. N. Amer. Pl., 2. p. 220. 
Synonymes. Noyer, Fx.; Walnuss, Ger.; Noce, Ital. 
Derivation. Jdglans is contracted from Jovis, Jove’s, and glans, a mast, or acorn ; and was applied 
by the Roman writers to this tree, on account of the excellence of its fruit as food, compared with 
other masts or acorns ; the only species that was known to the Romans having been the Juglans 
régia, or common walnut tree. 
Gen. Char., §&¢. Flowers unisexual, moncecious.x—Male flowers in cylindrical, 
drooping, solitary catkins. Calyx of 5—6 scales. Stamens 18—36.— Fe- 
male flowers solitary or a few in a group, terminal upon a shoot developed 
in the same year. Calyx ovate, including and adhering to the ovary. Petals 
4. Stigmas 2—3, fleshy. Fruit a drupe. Covering of the nut a fleshy 
husk of 1 piece that bursts irregularly. Mut woody, of 2 valves. (G. Don.) 
Leaves compound, alternate, exstipulate, deciduous ; imparipinnate, of 5— 
19 leaflets, all but the terminal one in opposite or nearly opposite pairs; all 
serrate, and all spreading in one plane. lowers greenish, Decaying leaves 
brown.—Trees deciduous, natives of Asia and North America, with coarse- 
grained wood; and fruit, in one species at least, much esteemed at the dessert, 
and valuable for the oil which it contains. 
The trees belonging to this order bear, with only two to three exceptions, so 
close a resemblance to one another in their young state (in which state alone 
most of them are to be seen in Britain), that we have been unable to satisfy 
ourselyes as to what are species, and what are only varieties. Michaux has 
arranged the species in the two following sections : — 
§ i. Simple Aments. Growth rapid. —1. Jodglans régia L. 2. J. nigra L. 
3. J. cathartica Michr., syn. J. cinérea LZ. The order of the flowering of 
these species in England is, first J. régia, then J. cinérea, in a few days after. 
which the catkins of J. nigra expand. The order of fruiting is different ; for, 
while the fruit of the common walnut begins to drop in the first or second 
week in September, that of the black walnut does not fall till the end of the 
same month, and that of the grey walnut not till the beginning of October.’ 
To this section may be added J fraxinifolia L., recently separated from Jiglans 
as the genus Pterocarya. 
§ ii, Compound Aments, each Peduncle bearing three. Growth slow.—1. Ji- 
glans oliveeférmis Michr. (syn. Carya oliveférmis Nudt.). 2..J.amara Michz. 
(C. amara Nuét.). 3. J. aquatica Miche. (C. aquatica Nutt.). 4. J. tomen- 
tosa Miche. (C. tomentosa Nutt). 5. J.squamdsa Miche. (C. alba Nutt.). 
6. J. laciniosa Miche. (C. lacinidsa Nuéé.). 7. J. porcina Miche. (C. porcina 
Nuit.). 8. J. myristiceeformis Miche. (C. myristiciformis Nutt.). 
¥ 1. J.re‘a1a LZ. The royal, or common, Walnut Tree. 
Identification. Lin, Hort. Cliff., p. 449. ; Willd. Arb., 153. ; Willd. Sp. Pl., 4. p. 455, 
Synonymes. Ndx Juglans Dod. Pempt. 816.; Nax Juglans, seu régia vulgaris, Bawh. Pin. 417. 
Noyer commun, Fr.; Noseguier Provence ; gemeine Walnuss, Ger. * é 
Engravings. Michx. N. Amer, Sylva, t, 29. ; the plates of this tree in Arb. Brit., 1st edit., vol. vii. ; 
and our fig. 1416. , 
Spec. Char. $c. Leaflets in a leaf, 5—9; oval, glabrous, obscurely serrated, 
Fruit oval, situated upon a short inflexible peduncle. Nut rather oval, 
rather even. A large deciduous tree. Persia, in the extensive province of 
Ghilan, on the Caspian Sea, between 35° and 40° of latitude. Height 40 ft. 
