Imatges de pàgina
PDF
EPUB
[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][ocr errors][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

Only the names of those genera are given under which a new species or variety is introduced. New genera are distinguished by the sign of addition, thus, +; and generic names which have been altered, by parallel lines, thus, ||.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]
[blocks in formation]

ARBORETUM ET FRUTICETUM

BRITANNICUM.

CHAP. CVI.

OF THE HARDY LIGNEOUS PLANTS OF THE ORDER GARRYA CEÆ.

-

GA'RRY Douglas. Flowers unisexual; those of the two sexes upon distinct plants. Male. Flowers in pendulous catkin-like racemes within connate bracteas. Calyx 4-leaved. Stamens 4.- Female? Flowers in pendulous catkin-like racemes, within connate bracteas. Calyx connate with the ovary, 2-toothed. Ovary 1-celled. Styles 2, setaceous. Ovules 2, pendulous, with funiculi as long as themselves. Fruit a berried pericarp, not opening, containing 2 seeds. Embryo very minute, in the base of a great mass of fleshy albumen. Species, 1. A native of the west side of the dividing mountain range of North America, in temperate latitudes. A shrub. Leaves opposite, without stipules, persistent. Wood without distinct concentric zones, or vasiform tissue (dotted ducts). (Lindley's Nat. Syst. of Botany, p. 173.)

-

GENUS I.

GA'RRY Doug. THE GARRYA. Lin. Syst. Diœ'cia Tetrándria.

Identification. Lindl. in Bot. Reg., t. 1686.

Derivation. Named by Mr. Douglas in compliment to Nicholas Garry, Esq., Secretary to the Hudson's Bay Company, to whose kindness and assistance he was much indebted during his travels in North-west America.

Description, &c. An evergreen shrub, with thick coriaceous leaves, like some species of evergreen viburnum.

■ 1. G. elliptICA Doug. The elliptic-leaved Garrya. Identification. Doug. MS.; Lindl. Bot. Reg., t. 1686. Engravings. Bot. Reg., t. 1686.; and our fig. 1951.

Description, &c. A shrub, hitherto seen only from 3 ft. to 4 ft. high, but which will probably grow much higher. Branches, when young, pubescent and purplish; when older, smooth and greyish. Leaves opposite, exstipulate, wavy, on short footstalks, oblong-acute, leathery, evergreen; dark green and shining above; hoary beneath, with simple, twisted, interwoven hairs. (Lindl.) This very handsome true evergreen is a native of North Carolina, where it was discovered by Douglas. It was introduced in 1828, and flowered for the first time, in the Chiswick Garden, in October, 1834. The following observations, abridged from the Botanical Register, are by Dr. Lindley: This plant is probaby the greatest botanical curiosity sent home by Douglas; for it appears to represent a natural order altogether distinct from any previously known, and connecting certain well-known natural orders

in an unexpected and satisfactory manner. In its amentaceous inflorescence, imperfect flowers, superior calyx, and mode of germination, Gárrya is very similar to Cupulíferæ, from which it differs most essentially in its wood without concentric circles or dotted vessels, its opposite exstipulate leaves, simple fruit, and minute embryo lying in a great mass of albumen. The latter characters bring it near Piperaceæ and their allies, especially Chlorántheæ, with which its zoneless wood (for Chloránthus has no annual zones), simple fruit, and opposite leaves, also agree; but the stipules of Chlorántheæ, together with its achlamydeous bisexual flowers, and articulated stems, distinctly separate that order." (Bot. Reg., t. 1686.) Only the male plant of Gárrya elliptica is in the country. When in flower (which it is from December till April), the plant has a most striking and graceful appearance, from

[graphic][subsumed][ocr errors]

its slender pendulous catkins, many of which are 8 in. to 1 ft. in length. It was at first grown in peat, but appears to prefer a loamy soil. It is readily increased by layers; and by cuttings in sand under a hand-glass. Plants, in the Fulham Nursery, in 1837, were 21s. each.

CHAP. CVII.

OF THE HARDY LIGNEOUS PLANTS OF THE ORDER PLATANA CEÆ.

[ocr errors]

PLA'TANUS Tourn. Flowers unisexual; those of the two sexes upon one plant, and those of each sex disposed many together, and densely, in globular catkins, that are sessile upon pendulous rachises, 2 generally upon a rachis; the flowers of each sex upon a separate rachis, produced from a separate bud.- Catkin of male flowers constituted of minute, rather fleshy, persistent bracteas, and of deciduous stamens. Filaments very short, situated between the bracteas, and of about their length. Anthers of 2 cells, longer than the filament; attached longitudinally to a connectivum, which is broader than the filament, and has a peltate tip.-Catkin of female flowers constituted of bracteas and pistils. Pistils numerous, approximately pairs. Ovary of 1 cell, including 1-2 pendulous ovules. Stigmas 2, long, thread-shaped, glanded in the upper part. Fruit a utricle, densely covered with articulated hairs, including pendulous, oblong, exalbuminous seed. Species, about 4. Natives of the temperate zones of the eastern and western hemispheres. Tall trees. Leaves alternate, palmate, annual; their margins revolute in the bud. Leaf-bud covered with a conical envelope; and immersed, in the preceding year, in the base of the petiole. (T. Nees ab Essenb. Gen. Pl. Fl. Germ., and observation.) The young shoots, leaves, and stipules are thickly covered with down, which as soon as they become fully expanded is cast off, and, floating in the atmosphere, is inhaled by gardeners and others who have occasion to be much among the trees, and produces a cough which is extremely disagreeable, and is not got rid of for several weeks. The inconvenience arising from this down, Michaux informs us, is well known in America, and it has been long familiar to French nurserymen. M. Ch. Morren, Professor of Botany at the University of Liege, gives an account of it in the Transactions of the Royal Academy of Brussels, under the title of "Note sur l'Effet pernicieux du Duvet du Platane; the only preventive which he mentions is the obvious one adopted by M. Henrard, nurseryman at Liege, viz., that of covering the nose and the mouth with a handkerchief of fine gauze. (See p. 2045., and L'Echo du Monde Savant, Jan. 6. 1838.)

[ocr errors]
« AnteriorContinua »