1342 ARBORETUM AND FRUTICETUM. PART JII. 



I'lagianthus dioariciMus Forst., t. 43., is a native or New Zealand, and waa introduced in 182!^ 

 It is tolcrablv hardy ; a plant having lived with us at Bayswater, with very little protection, since 

 18i2i). P. sid'ii'titfs Hook. Hot. Mag., t. .iJi'fi., is a twiggy shrub, from aft. to 3ft. high, probably also 

 as hardy as the other. Both species flower in April 



Ciuplia iUaU-rnii\dcs Bot. Mag., t. V'Jil., has been an inhabitant of our green-houses since 1G9ti. It 

 it a native of the Cape of Good Hope, and would probably stand against a conservative wall. 



CHAP. C. 



OF THE HARDY LIGNEOUS PLANTS OF THE ORDER rRTICA^CEiE. 



These are included in five genera, which have their names and characters 

 below. 



Jl/o^RL's Tuurn. Flowers unisexual ; those of the 2 sexes, in most species, 

 upon the same plant ; in AI. nigra Voir., and, according to Gronovius ( y'irg.y 

 l+G.), in M. riibra L., upon distinct plants : according to Kalm {Act. Siu-c, 

 1776), the sexes ot" jl/. rubra L. are polygamous. — Male flowers disposed 

 in a drooping, peduncled, axillary spike. Calyx of 4 equal sepals, imbri- 

 cate in aestivation, expanded in flowering. Stamens 4-. A rudiment of a 

 pistil is present. — Female flowers in ovate erect spikes. Calyx of 4 

 leaves, in opposite pairs, the outer pair the Uu-ger, all upright and persistent, 

 becoming pulpy and juicy. Ovary of 2 cells, one including one pendulous 

 ovule, the other devoid of any. Stigmas 2, long. In the state of ripeness, 

 each ovary is a fleshy and juicy utricle, and is covered by the fleshy 

 and juicy calyx : the aggregate of the ovaries and the calyxes from a 

 spike of flowers constitutes what is termed a mulberry. Seed pendulous 

 — Species several ; natives of Asia, south of Europe, and North America. 

 Trees. Sap white. Leaves alternate, large, mostly lobed, and rough ; the 

 favourite food of the silk-moth (J96nibyx mori F.) in its caterpillar state. 

 (Chiefly from 7\ Xecs ah Escnbcck, Gen. PL Fl. Germ.) 



Broussone't/.j L'Herit. Flowers unisexual ; those of the two sexes upon 

 distinct plants. — Male flowers in pendulous cylindrical catkins; each 

 flower in the axil of a bractea. Calyx shortly tubular, then 4-parted. Sta- 

 mens 4, elastic. — Female flowers in peduncled, axillary, upright globular 

 heads. Calyx tubular, its tip with 3 — 4 teeth. Ovary within an integument 

 that arises from the bottom of the calyx. Style lateral, prominent. Stigma 

 taper. Fruit club-shaped, proceeding from the bottom of the calyx, and 

 extended much beyond its tip; and consisting of the integument in which 

 the ovary was enclosed, and now become very juicy ; and of a 1-seeded 

 oval utricle with a crustaceous integument, and enclosed within the juicy, 

 integument. — Species 1, native to Japan and the isles of the Pacific Ocean. 

 A tree, with leaves large, lobed or not, and hairy. {l)u Hamcl, Traite des 

 Arhrcs, ed. nouv. ; and the Penny Ci/clopccdia.) 



Maclu'r--/ Nuttall. Flowers unisexual; in M. aurantiaca Nittt., and M. 

 tinctoria 2). Don, those of the two sexes upon distinct plants ; if not so in 

 the rest, then upon the same plant. What follows relates to M. aurantiaca 

 Nutt. — Male flowers in a very short almost sessile racemose panicle of 12 

 or more flowers. Calyx 4-parted. Stamens 4, in some instances 3. — 

 Female flowers closely aggregate upon an axis, and forming a globular head 

 that is borne upon a short axillary peduncle. Calyx oblong, urceolar, 

 a[)parently with 4 lobes at the tip : it includes the ovary, which is situated 

 above its base, and is terminated by a style that is thread-shaped, downy, 

 and protruded beyond the calyx to the length of nearly 1 in. The ovary 

 becomes an achenium about 2. in. long, half ;is much broad, compressed, 

 oval, with the tip blunt and unsynunetrical from an indentation on one side 

 in which the style had been attached. — A tree, native of North America. 

 Spiny : spines axillary. Sap white. Leaves alternate, ovate. Stipules 

 minute, deciduous, {Nullall ; Gard. .tl/r/^'., vol. xi. p. 312 — 31G., and vol. 

 xii. p. 210.; and observation.) 



