POPULUS 



1411 



rarely seen, even iu cultivated KfOuiuKs. It is some- 

 times spontaneous in the East. The tree Isnown in the 

 West as Populus belulifolia is only a robust form of 

 tlie European P. nigra. Variable in cult, and grown in 

 European collections under a variety of names. With 

 tlie exception of var. Jtalica, these forms are little 



1916. Populus tremuloides (X %). 



Var. 61egans, Bailey (P. eUgntis of nur.serymen), is 

 a I ree of pronounced strict or pyramidal habit, but con- 

 .-iderahly broader than the Lombardy Poplar: foliage 

 small and liKht-colored and very versatile in a breeze, 

 with a handsome reddish tint to the leaf-stalks and 

 younf^ shciots. It is worth growing in every well-kept 

 place, especially if placed against a planting of heavier 

 foliane. I'iijiii'liis etniescens of some American nur- 

 servmen is very like this, although it has less color 

 and' brisrhtness. 



Var. Italica, Du Roi (var. pyramiddlis, Spach. P. 

 lUiUrn, Moench. P. dllatata. Ait. P. fastigiata, Desf. 

 /'. pjira m klAlis , Rozier. P. pyra m iddta , P. Pan ndnica , 

 P. PoldnicaylloTt.). Lombardy or Italian Poplar. 

 Figs. 1907, 1914. Differs from the typical Black Poplar 

 (/'. niyrn) in its tall, narrow growth, glabrous young 

 shoots', a cnnfimiPd hnhit nf suckering from the root 

 and generidlv :i mmh" i :i]"iiiii.' base to the leaves. It is 

 one of the cii.M i. : i ;~nr i rn-s of parts of Italy, and it 

 is from oni/ ..r il" iiihui provinces, Lombardy, that 

 its common ikmh.' i- iliri\ . d. The tree is probably na- 

 tive in Asia, however. With age, the Lombardy Pop- 

 lar becomes one of the most striking and picturesque 

 of trees, particularly when some of the sprouts are 

 allowed to grow about the old stock, as in Fig. 1907. In 

 the northernmost states it is not long-lived. 



1917. Populus grandidenlata ( 



i. Terminitl htids rfhilinli/ small, not riliilhwus, 

 often pubescent. Aspens and White Poplars. 

 Mature Ivs. vsually qreen, greenisli or brown be- 

 neath. 

 . tr6mula, Linn. Europe.w Aspen. Fig. 1915. 

 en headed, light-leaved tree, becoming 50-(i0 ft. tall: 

 . sm:dl and thin, round-oval, more or less whitened 

 leath when young, bordered with deep and rounded 



,. L.1 ihe tirst 

 lit the young 

 ne:s very con- 

 is said some- 

 iisually much 

 I horticultural 



incurved teeth; the leaf-stalks long, slender and flat- 

 tened, giving a restless motion to the foliage: leaf-buds 

 small. Widely distributed in Europe and Asia, in this 

 country know'n chiefly in its weeping form (var. peii- 

 (;«;«). — The weeping form of the European Aspen is 

 perhaps the best weeping tree amongst the Poplars. 

 The spray is light, airy and fountain-like, quite unlike 

 the more common weeping forms of our native Populus 

 grandidentata. which present a stiff, angular form, a 

 combination that is rarely pleasint;. A characteristic 

 feature of this tree is lli'.' |.i"iii :■ n -I its very long 

 catkins that appear in c.n' . ' 'ii before our 



native Poplars are in M- ' I : iinjiate or male 



catkins are particularly pi. ;i in^:, nnM planters should 

 select that sex, if possible. 



9. tremuloides, Michx. (P. Athenihisis and ffrwco, 

 Hort.). American AsrEN. Figs. 1906, 1916. Very like 

 P. tremnln, but the Ivs. are usually less circular and 

 more abruptly acuminate, the niar^-in :n . -mill . n-iiate 

 rather than deeply toothed, anil 111' : i rii on 

 the under side. Generally distrilnn. : i . ii m.-rica 

 north of Pennsylvania and Kentw I ... i ■ m i,-i lui,' to 

 Mexico in the mountains, 

 trees to spring up in clca 

 trees is whitish gray, ni 

 spicuous in a coppice. 1 

 times to reach a height u 

 smaller than this. There 

 varieties. 



10. grandidentata, Michx. (P. Gr7rca phxdula, P. 

 nigra phidula and Parasol de St. Julien of nursery- 

 men). Large-toothed 

 Aspen. Fig. 1917. Tall, 

 straight tree, becoming 

 75 ft. high, known in 

 cultivation in various 

 weeping forms. Distin- 

 guished from P. trem- 

 ula by much larger and 

 thicker Ivs., which are 

 bluish or rusty white be- 

 neath, more ovate in out- 

 line, with larger and 

 more spreading teeth, 

 stouter leaf-stalks and 

 larger leaf-buds. Nova 

 Scotia to Minn, and 

 Tenn. S. S. 9:488.- In 

 its normal or erect form 

 it is rarely cultivated, 

 but the weeping kinds, 

 under a variety of names, 



are frequently seen. Most, and perhaps all, of these 

 varieties originated in Europe, where the tree, like the 

 Cottonwood and the common Aspen, were early intro- 

 duced. The habit of the tree is too stiff and the foli- 

 age rather too heavy to make the best weeping subjects, 

 however. One of the best of these weeping forms is 

 that known as Parasol de St. Julien. The winter twigs 

 of the weeping varieties have a characteristic weak or 

 zigzag growth.— P. heteropliylla, Linn., a tall tree of 

 the eastern U. S.,may be in cult., although it does not 

 appear in trade lists. It has cordate-ovate, obtuse, 

 crenate Ivs., with terete petioles, the young parts and 

 the Ivs. white-tomentose. It is mostly an inhabitant of 



11. Sifeboldii, Miq. (P. rotundifdlia, Hort.) Fig. 1918. 

 Tree, 20-30 ft., of spreading habit, with rather dark and 

 heavy foliage: Ivs. large, round-ovate, with a short tri- 

 angular subacute apex, nearly or quite truncate at the 

 base, dentate-serrate, with shallow incurved teeth, more 

 or less whitened beneath. Japan. — Hardy in western 

 New York. 



beneath, at 



12. 4Iba, Linn. White Poplar. Abele. Large, much- 

 branched tree, with whitish bark on the young branches : 

 Ivs. much like those of Populus grandidentata, but 

 smaller, usually thicker and more angular, the under 

 surface- especially early in the season-woolly white. 

 Eu. and Asia.— The tvpical form of Populus alba is less 



1918. PoDulus SieboldiK 



