24 
by the use of some of the recently introduced species plant breeders 
may be able to produce new races which may add new and valuable 
varieties for garden makers. 
Crataegus coccinioides. The large plant of this handsome Thorn is 
now covered with flowers in the old Crataegus Collection on the bank 
between the Shrub Collection and the Boston Parkway. It belongs to 
the Dilatatae Group of the genus, so named on account of the broad 
leaves. The five species have flowers from three-quarters of an inch 
to an inch in diameter, with twenty stamens and rose-colored anthers, 
and dull or bright, subglobose red fruit, often blotched with green, 
crowned by the much enlarged calyx of the flower and nearly an inch 
in diameter. Five species of this Group are recognized; of these four 
are trees and the fifth, C. speciosa from southwestern Missouri, and 
one of the handsomest of the American Hawthorns, although sometimes 
arborescent, has usually been considered a shrub. Of the other species 
one is distributed from the coast of Rhode Island and eastern Massa- 
chusetts to the neighborhood of Montreal, one grows in southern Que- 
bec and Ontario, and another is now known to grow only on the hills 
in the neighborhood of Albany, New York. C. coccinioides has been 
found only in dry woods in the neighborhood of St. Louis and in eastern 
Kansas. It differs from the other species in its very compact, nearly 
globose few flowered flower-clusters and its dark crimson fruit flattened 
at the ends, with flesh deeply tinged with red. C. coccinioides as it 
grows in the Arboretum is a shapely tree with a broad, dense, round- 
topped head from twenty-five to thirty feet across and a well-formed 
trunk. This tree was raised in the Arboretum from seeds planted in 
1880, and shows that in the New England climate and on New England 
soil forty years are needed to produce a large and shapely Hawthorn 
tree. 
Cytisus elongatus. Plants of a European Broom growing on the 
upper side of Azalea Path have been covered with bright yellow flow- 
ers during the last two or three weeks. Earlier plantings of this beau- 
tiful plant have not succeeded in the Arboretum, but the plants on 
Azalea Path raised here from seed have been growing in their present 
position for two years and appear perfectly hardy. Cytisus elongatus 
is a common plant in Hungary and Bulgaria, and by some botanists is 
considered a vigorous form of C. ratisbonensis. The Arboretum plants 
are nearly three feet high and covered from end to end of the stems 
with bright yellow flowers an inch in length. Cytisus Beanii is also in 
flower on Azalea Path. This is a semiprostrate little shrub which ap- 
peared at Kew in 1900 and is supposed to be a chance hybrid of C. 
Ardoini and C. pungens. It is a beautiful yellow-flowered little plant 
but, judging by its parentage, not likely to be very hardy or long-lived 
in this climate. 
