1342 



ARBORETUM AND FRUTICETUM. 



PART III. 



Plagianthus divurlchtus Forst, t. 43., is a native of New Zealand, and was introduced in 1822. 

 having lived with us at Bayswater, with very little protection, since 

 Mag., t. 3696., is a twiggy shrub, from 2ft. to 3ft high, probably also 



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

 1829. P. sidmdes Hook. Bot. Mag., t. 3696., is a tw 

 as hardy as the other. Both species flower in April. 



Ciuytia. aJatcrno}des Bot. Mag., t. 1321., has been an inhabitant of our green-houses since 1692. It 

 is 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 Z7RTICA X CE^. 



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



below. 



MO^RUS Tourn. Flowers unisexual ; those of the 2 sexes, in most species, 

 upon the same plant ; in M. nigra Poir., and, according to Gronovius ( Virg. t 

 146.), in M. rubra L., upon distinct plants : according to Kalm ( Act. Suec., 

 1776), the sexes of M. 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 larger, 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 (l?6mbyx mori F.) in its caterpillar state. 

 (Chiefly from T. Nees ab Esenbeck, Gen. PI. Fl. Germ.) 



BROUSSONE'T/^ 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. (Du Hamcl, Trade des 

 Arbres, ed. nouv. ; and the Penny Cyclopaedia.) 



MACLU N R^ Nuttall. Flowers unisexual; in M. aurantiaca Nutt. t and M. 

 tinctoria D. 2}on, 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, 

 apparently 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 in. long, half as much broad, compressed, 

 oval, with the tip blunt and unsymmetrical 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. (Nuttall; Gard. Mag., vol. xi. p. 312 316., and vol. 

 xii. p. 210.; and observation.) 



