1672

ARBORETUM AND FRUTICETUM.

PART III.

minal branches of trees are liable to be injured by severe frost; but in theclimate of London this chiefly applies to plants in the nurseries. The Caro-lina poplar roots from cuttings with some difficulty; and, therefore, in Britishnurseries, it is commonly propagated by layers. In ornamental plantations,it ought always, as Miller advises, to be planted in situations where it willbe sheltered by other trees; and, where it is wished to attain its full size, itought always to be planted in good soil, and near water. In North America,where it grows in the swamps of Carolina, it is accompanied by the Taxo-dium distichum, Nyssa biflora, .Tcer rubrum, Carya aquatica, Quercus lyrata,Populus canadensis, and P. heterophylla.

Statistics. P6pulus angulctta in Britain. At Syon, it is 83 ft. high, diameter of the trunk 3 ft.,and of the head 61 ft.: see the plate of this tree in our last Volume. At Ham House, Essex, it is70 ft. high, diameter of the trunk 2£ ft., and of the head 45 ft. In Durham, at Southend, 15 yearsplanted, it is 65 ft, high. In Suffolk, at Ampton Hall, 57 years planted, it is 64ft. high ; the diameterof the trunk 2 ft. 3 in., and of the head 95 ft. In Yorkshire, at Grimston, 12 years planted, it is 50 tt.high. In the Experimental Garden, Inverleith, 9 years planted, it is 15ft. high.

Ydpulus angulata in Foreign Countries. In France, at Nantes, in the nursery of M. De Nerriferes,60 years old, it is 80 ft. high, with a trunk l$ft. in diameter ; in the Botanic Garden at Avranches,24 years planted, it is 50 ft. high; the diameter of the trunk l$ft., and of the head 30 ft. InAustria, at Vienna, in the University Botanic Garden, 8 years planted, it is 24 ft. high; at Briickon the Leytha, 70 years old, it is 80ft. high, the diameter of the trunk 2| ft., and of the head 48 ft.In Bavaria, at Munich, in the English Garden, 16 years old, it is 15 ft. high.

Commercial Statistics. Plants, in the London nurseries, are Is. 6d. each ; atBollwyller, 1 franc and 50 cents ; at New York, 20 cents.

¥ 13. P. heterophy'lla L. The various-s^cp^-leaved Poplar Tree.

Identification. Lin. Sp. PI., 1464.; Ait. Hort. Kew., ed. 1., 3. p. 407., ed. 2., 5. p. 397.; Michx. FI.Bor. Amer., 2. p. 244.; Willd. Arb., 233., Sp. PI., 4. p. 806.; Pursh FI. Amer. Sept., 2. p. 619.;Spreng. Syst. Veg., 2. p. 244.

Synonymes. P. magna, foliis amplis, aliis cordiformibus, aliis subrotundis, primoribus tomentosiiGron. Virg ., 194. 157.: P. cordifdlia Burgsdorf, l.odd. Cat., edit. 1836. ; P. argentea Michx. NorthAmer. Sylva, 2. p. 235. t. 97.; Cotton Tree, Michx. N. A. S.

The Sexes. Michaux the elder has noticed some characters of the flowers of both sexes in his cha-racter of the species in the Fl. Bor. Amer.’, and they will be found translated in our specificcharacter. Only the male is in British gardens.

Engravings. Michx. Arb., 3. t. 9.; Michx. North Amer. Sylva, 2. t. 97.; N. Du Ham., 2. t. 51.; andour fig. 1534.

Spec. Char., $ft\ Shoot round, tomentose. Leaf, while young, tomen-tose; afterwards less so, or glabrous. Petiole but slightly compressed. Diskroundish ovate, having a small sinus at the base, and being slightly auricledthere (or, as Michaux, jun., has expressedit, with the lobes of the base lapped, so asto conceal the junction of the petiole),blunt at the tip, toothed; the teeth shal-low, and having incurved points. Maleflowers polyandrous. Female flowers gla-brous, situated distantly along the glabrousrachis, and upon long pedicels. (Michx.sen., and Pursh.) A tree, a native of ,

North America, from New York to Caro- ;lina, in swamps, and more particularly in \the country of the Illinois, and on thewestern rivers. It grows there to theheight of 70 ft. or 80 ft.; flowering inApril and May. It was introduced intoEngland in 1765; but we have never seenplants of it higher than 5 ft. or 6 ft.;though a specimen tree in the Mile End Nursery, and another at Syon,must have been planted more than 50 or 60 years; and though it is said byBose to he a lofty tree in the neighbourhood of Paris. It is a very remark-able species, from the particular character of its leaves, which, though as largeas, or larger than, those of P. angulata, and something resembling them in out-line and in position on the branches, yet have nearly cylindrical footstalks,and their disks hanging down on each side from the midrib in a flaccid manner,not observable in any other species of the genus. According to Michaux,