28 
to be a hybrid between the Scotch Rose and the Austrian Briar; it is 
very hardy, flowers freely every year and grows to a large size. Un- 
less, however, it is cut back occasionally it becomes straggling in habit 
and unsightly. The yellow-flowered forms of the Scotch Rose, R. 
spinosissima, var. hispida and var. lateola^ have been flowering well 
this year; they are handsome and hardy plants, and although the flow- 
ers soon drop their petals they are well worth a place in collections of 
single-flowered Roses. R. spinosissima fulgida with single delicate 
pink flowers is another variety of the Scotch Rose which has been 
covered with flowers during the past week, 
A pink-flowered Locust. One of the most distinct and beautiful 
forms of the Locust-tree, Rohinia Pseudacacia var. Decaisneana, has 
been unusually full of flowers during the past ten days. This tree, 
which first flowered in 1862 in the nursery of M. Villeveille at Manos- 
que in southern France, differs from all the other forms of this Locust 
in its pale pink flow^ers. Many forms of the Locust have been raised 
in European nurseries; they are all handsome and hardy, and could 
they be protected from the borers which riddle the trunks and branches 
of all forms of the Locust they would be as highly esteemed here as 
they are in France and Germany. The variety Decaisneana must not 
be confounded with R. viscosa, an American tree with pink flowers in 
partly erect clusters, and well distinguished by the glandular viscid 
hairs on the branchlets and flower-clusters. This tree is also flowering 
in the Arboretum, as is the little Rose Acacia, Acacia hispida^ a hispid 
shrub with large bright rose-colored handsome flowers, which is not 
known to produce seeds but spreads widely and rapidly by underground 
stems and may become a troublesome weed. 
Viburnum cassinoides is blooming profusely but nearly three weeks 
before its usual time for flowering. In cultivation this Viburnum is a 
round-topped shrub from four to six feet high. The leaves are thick 
and lustrous, and differ greatly in size and shape. The flowers are 
slightly tinged with yellow and are borne in wide, slightly convex 
clusters which also vary greatly in size. This plant appears even more 
beautiful in the autumn than in June; for the fruit is larger than that 
of the other summer-flowering American Viburnums, and at first when 
fully grown is yellow-green, becoming pink and finally dark blue or 
nearly black and covered with a pale bloom, fruits of the three colors oc- 
curring together in the same cluster. This Viburnum has been gener- 
ally planted in the Arboretum, and it is certainly one of the handsom- 
est shrubs of eastern North America. Two other handsome American 
Viburnums, V. bracteatum and V. molle, are in bloom and are interest- 
ing to persons who like to see rare or little known plants. The former 
grows only on the cliffs of the Coosa River near Rome, Georgia, and 
the latter in southern Kentucky and very locally in southern Missouri. 
