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Late-flowering Lilaes. Several late-flowering Lilacs are now attrac- 
tive. The best known of these is probably S. villosa, a large shrub from 
northern China with rose-colored pink or nearly white, bad-smelling 
flowers; it was introduced into the Arboretum from Peking in 1882 
and has been largely planted in this part of the country. It flowers 
very freely and is a first-rate garden shrub valuable for its late flowers 
which prolong the season of Lilac bloom. Forms of the hybrid {S. 
Henryi) between this species and the Hungarian S. Josikaea are also in 
flower. The handsomest of these hybrids, called S. Lutece, is a good 
garden plant with the bluish-purple flowers of its Hungarian parent 
and the habit of S. villosa. Another late-blcoming lilac, Syringa Juli- 
anae, a native of western China where it was discovered by Wilson in 
1901, promises to be a good addition to garden Lilacs. It is related 
to S. pubescens and the flowers, like those of that species, are small 
and fragrant; they differ from those of other Lilacs in the deep purple 
color of the outer surface of the corolla-tube. This is the color, too, 
of the stalks of the infioresence and of the individual flowers, while 
the inner surface of the lobes of the corolla is white, so that as the 
flowers open the infioresence is purple and white. This Lilac, like every 
other species of Lilac now in cultivation, is perfectly hardy here and 
the Arboretum specimen is now covered with flowers. Another Chinese 
Lilac, Syringa microphylla, is in flower for the first time in America; 
it is a plant with small leaves, and small, pale pink, fragrant flowers 
resembling, except in color, those of & pubescens. 
Syringa Wolfii. The handsomest, however, of all the late-flowering 
Lilacs is S. Wolfii, a native of Mongolia. This plant reached the Ar- 
boretum from St. Petersburg in 1906 and before it had received a name. 
It is related to S. villosa which it resembles in its foliage, but it ap- 
pears to be a larger and more vigorous plant. The small, dark blue- 
purple or rose-purple flowers are borne in clusters which on vigorous 
plants are sometimes two feet long or more and a foot in diameter, 
and are produced in the greatest profusion. By many persons it is 
considered the handsomest of all the species of Lilacs, and certainly 
no other Lilac is more vigorous or produces such great clusters of 
flowers. The flowers, however, lack the fragrance of the common 
Lilac and of several of the Chinese species. 
Laburnum alpinum. The large plant of the so-called Scotch Labur- 
num is now in bloom near the entrance to the Arboretum from the 
Forest Hills Gate. It is a hardier plant in this country than the better 
known L. vulgare; it flowers about two weeks later than that tree, 
and its bright yellow flowers are borne in longer clusters. This is the 
handsomest yellow-flowered large shrub or small tree which can be grown 
successfully in New England, and it is surprising that a plant of this 
character which is so generally cultivated in Europe should remain so 
little known in this country. A hybrid between this species and Labur- 
num vulgare, called L. Parkii, has been in flower on Hickory Path near 
Centre Street; it is a small and perfectly hardy tree. 
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