Macuura. CXXX. URTICACEZ. 509 
Section I. MOREZ. 
Shrubs or trees with a milky juice. Fruit fleshy, composed of the 
fleshy calyx or receptacle. 
1. MORUS. 
Celtic mor, black; the color of the fruit of some of the species. 
Flowers $, rarely 3’ 9—<c' in loose spikes; calyx 4-parted. @ in 
dense spikes; calyx 4-parted; styles 2; achenium compressed, en- 
closed within the baccate calyx; spike constituting a compound 
berry.— Trees with alternate, generally lobed leaves. F'ls. inconspicuous. 
1. M. rusra. Red Mulberry. 
Lws. scabrous, pubescent beneath, rounded or subcordate at base, equally 
serrate, acuminate, either ovate or 3-lobed; fertile spikes cylindric; fr. dark red.— 
This tree varies greatly in height according to its situation. In New England, 
where it is not very common, it is but a shrub 15—20f high. In the Middle 
and Western States, it attains the elevation of 50—60f, with a diameter of 2f. 
Trunk covered with a grayish bark, much broken and furrowed. Wood fine- 
grained, strong and durable. Leaves 4—6’ long, 3 as wide, entire or divided 
into lobes, thick, dark green. Flowers small. Berries of a deep red color, 
compounded of a great number of small ones, of an agreeable acid flavor. 
May. é; 
2. M. avea. White Mulberry.—Lvs. nearly glabrous, cordate and oblique at 
base, unequally serrate, either undivided or lobed; fr. whitish_—Native of Chi- 
na. Cultivated for the sake of its leaves as the food of silk worms. A tree of 
humble growth. Leaves 2—4’ long, 3 as wide, acute, petiolate. Flowers green, 
in small, roundish spikes or heads. Fruit of a yellowish-white, insipid. 
B. multicaulis. (Chinese Mulberry.) Laws. large (4—7’ long, 3 as broad).—Shrub. 
3. M. nicra. Black Mulberry.—Lws. scabrous, cordate, ovate or lobed, obtuse, 
unequally serrate ; fertile spikes oval.—Native of Persia, cultivated for ornament 
and shade, in this as well as in many other countries. Fruit dark red or black- 
ish, of an aromatic, acid flavor, » 
2. BROUSSONETIA. L’Her. 
In honor of P. N. V. Broussonet, a distinguished French naturalist. 
Flowers ¢2.—c Ament cylindric; cal. 4-parted. 9? Ament glo 
bose; receptacle cylindric-clavate, compound; cal. 3-4-toothed, tubu- 
lar; ovaries becoming fleshy, clavate, prominent; sty. lateral; seed 1, 
covered by the calyx.—Trrees, from Japan. | 
B. papyrirEra. Paper Mulberry.—Lws. of the younger tree, roundish- 
ovate, acuminate, mostly undivided, of the adult tree 3-lobed; fr. hispid—A 
fine, hardy tree, occasionally cultivated. It is a low, bushy headed tree, with 
large, light green, downy leaves, and dark red fruit a little larger than peas, 
with long, purple hairs. 
3. MACLURA. Nutt. 
Dedicated to William Maclure, Esq., of the U. S., a distinguished geologist, 
_ Flowers ®2.—c inaments. Calyx 0; ova. numerous, coalescing 
into a compound, globose fruit, of 1-seeded, compressed, angular, cu- 
neiform carpels ; sty. 1, filiform, villous — A Jactescent tree, with decid- 
wous, alternate, entire, ex-stipulate leaves, and axillary spines. 
M. aurantiaca. Nutt. Osage Orange. 
A beautiful tree, native on the banks of the Arkansas, &c. Leaves 4—5/ 
by 14-23’, glabrous and shining above, strongly veined and paler beneath, on 
short petioles, ovate or ovate-oblong, margin obscurely denticulate, apex suba- 
cuminate, rather coriaceous. The fruit is about the size of an orange, golden- 
yellow when ripe, suspended by an axillary peduncle amid the dark glossy 
