On this bank and close to the boundary wall is a plant of Crataegus 
Carrierei. This small tree is of doubtful origin, all the individuals hav- 
ing been obtained from a single seedling which appeared spontaneously 
several years ago in the nursery of the Jardin des Plantes in Paris. In 
some ways it resembles some Mexican species and it might be Mexican 
did not its hardiness in the Arboretum indicate that its home was in a 
colder country than Mexico. The fact that seedlings are identical with 
the parent seems to preclude the idea of hybrid origin; but whatever this 
may have been Crataegus Carrierei is an ornamental plant of the first 
class. It is now covered with its thick, pointed, lustrous leaves which 
are still green or only slightly tinged with yellow and which set off to 
advantage the large, light orange-red oblong fruits which are produced 
in great abundance. 
Very beautiful, too, now is the Washington Thorn, Crataegus cordata , 
of the foothill region of the southern Appalachian Mountains and of 
southern Missouri, although it will be more beautiful probably a fortnight 
later when the leaves will have taken on their bright autumn colors of 
orange and scarlet; now they are just beginning to turn red and the shin- 
ing surface contrasts beautifully with the small round scarlet fruits. 
The Washington Thorn should be more generally planted for it has much 
to recommend it. It is a slender, narrow tree sometimes thirty feet tall; 
it is one of the latest of the Hawthorns to flower and the flowers, which 
are not large and dull white in color, are produced abundantly. The 
leaves are small and nearly triangular, and the fruit, which ripens in 
October, remains in good condition on the trees until spring. The only 
objection to this tree is the brittleness of the branches which are often 
split or broken by severe storms. 
On the left-hand side of the Peter's Hill Road, going from the Hemlock 
Hill Road across Bussey Street and between a large White Oak and the 
group of Crabapples, is a collection of shrubby Hawthorns. Some of 
these, like Crataegus Buckleyi, C. foetida , C. apposita, C. nemoralis , 
etc. , are old enough to show their habit, and the beauty of their autumn 
foliage and of their fruits. The plants of this group, which is called In- 
tricatae from the first species described in it, are all small shrubs, or 
occasionally small trees in the south, with very large flowers and large, 
highly colored fruit. Species in this group are found from New England 
to Georgia, and to Ontario, Michigan and Missouri ; they appear to be 
most abundant in Pennsylvania, but are rare in the West. Until a dozen 
years ago they had been entirely overlooked by American botanists and 
were unknown in gardens, with the exception of Crataegus intricata, 
which had been grown and described in the Botanic Garden at Copen- 
hagen. Nearly all the species which are known are well established in 
the Arboretum and promise to become an important contribution to 
American gardens in which their dwarf habit, large flowers and hand- 
some fruits will make them valuable. 
A few plants in the Arboretum are still conspicuous for the beauty of 
the autumn color of their leaves. The most conspicuous, perhaps, is 
Parrotia persica , a member of the Witch Hazel Family and a native of 
the Trans-Caucasus and Persia. Sometimes a small tree, it here grows 
in the form of a high broad bush. The flowers and the fruit are not con- 
spicuous but the leaves, which in shape resemble those of the native 
Witch Hazel, are now splendid with tints of clear yellow, orange and red. 
A plant can be found in the Witch Hazel Group near the junction of the 
