
win aod AS eit 

ADJACENT TO HORTICULTURAL HALL. 57 

Carya porcina, Neéfa//. PiGNuT, Broom Hickory. Leaflets § to 7; 
fruit with husk variably “ pear-shaped, oblong, or oval ;” thick-shelled, large 
nut, oblong, kernel bitter when fairly tasted. Wood valuable, red at heart; 
bark rough. 
Carya sulcata, Nw/fal/. WrESTERN SHELLBARK Hickory. Bark as in 
our shellbark, but leaflets 7 to 9, quite downy on under surface; the large, 
thick husk angular above the middle; nut 1 to2 inches long, and often 
angular, pointed at the ends; heart-wood not dark. * From Pennsylvania west- 
ward and southward, 
Carya tomentosa, Nuéta//l. MocKER-NuT, WHITE-HEART Hickory. 
Bark close, rough, and adherent; pointed leaflets 7 to 9, when young with a 
resinous odor; thick, hard-husked fruit globular or nearly so; thick-shelled 
nut roundish, 4-ridged near the summit, only I inch in diameter. The variety 
maxima, Ax/fta//, however, has a thick-husked fruit 2 inches or more in diam- 
eter. This species is common, and furnishes a valuable wood for certain 
purposes. 
Juglans. WALNUT. Sterile flowers in single (not clustered) catkins; 
stamens 12 to 40; fertile flowers with a 4-cleft calyx and 4 small green petals; 
fruit-husk not splitting as in the hickory; leaves, bark, and shoots often strong- 
scented. ; 
Juglans cinerea, Zinneus. BUTTERNUT. Native tree of middling size; 
bark smooth and white; young branches sticky hairy; stamens about 12; nut 
2 inches long by about I to 1 inches through, with sharp, rough longitudinal 
ridges. Timber of no great value. 
Juglans Mandschurica, Maximowicz. _MANCHOORIAN WALNUT. Tree 
from the Amoor River region; stamens about 8; fruit as in the preceding, 
except that the ridges of the nut are thicker. 
Juglans nigra, Zinneus. BLACK WALNUT. Young branchlets hairy but 
not sticky; nut round, or nearly so, ridged, but not deeply or sharply. One of 
the largest and most valuable of all our native trees. 
Juglans pendula, ——? Found in the invoices, but otherwise unknown 
to us. 
Juglans regia, Zimneus. ENGLISH WALNUT. Tree widely distributed 
over Southern and Central Asia, and not a mative of England. Oval leaflets 
entire and nearly smooth ; husk of the fruit brittle and readily separating from 
the roundish, wrinkled, light-brown nut when ripe. The following varieties 
are in the Park: laciniata, Cas. De Cando/le ; with the § to 6 pairs of leaflets 
much divided; nut attenuated at the apex. monophylla, Cas. De Candolle ; 
has not more than a pair of entire-margined leaflets to the leaf. preepartu- 
riens, Cas. De Candolle ; 4 pairs of sessile, ovate, entire, leathery leaflets. 
Jugians rupestris, Zxge/mann. Isa large shrub or small tree from New 
Mexico, characterized by its numerous, 17 to 23, narrow, long-pointed leaflets, 
and its small fruit, the nut of which is not more than ¥% inch in diameter. 
Pterocarya. Differs from Carya chiefly in its fruit, which is 2-winged and 
does not open at maturity, 
