|Japan
| | |
,, *tremula (Aspen)|Tree 70 ft.| ,, ,, ,, |Europe and North
| | |Asia
| | |
,, pendula |Weeping | ,, ,, ,, |Garden form
(Weeping Aspen) |Tree | |
| | |
,, tremuloides |Weeping | ,, ,, ,, |North America
|tree 40 to | |
|50 ft. | |
| | |
,, ,, *pendula |Weeping | ,, ,, ,, |Garden form
(Syn. P. juliana |Tree | |
pendula) | | |
| | |
,, trichocarpa |Tree 30 ft.| ,, ,, ,, |Western North
| | |America
| | |
,, tristis |Tree 60 ft.| ,, ,, ,, |North-East Asia
| | |
Ptelea trifoliata |Small tree |Ordinary soil and position|North America
(Hop tree) |8 to 9 ft. | |
| | |
*Pterocarya |Tree 30 ft.|Good deep loam, rather |Caucasus
caucasica (Syn. | |dry; starts early, |
P. fraxinifolia) | |so catkins and leaves |
| |sometimes get injured by |
| |frost |
| | |
,, rhoifolia |Tree 25 ft.| ,, ,, ,, |Japan
| | |
,, stenoptera |Tree 20 ft.| ,, ,, ,, |China
-------------------+-----------+--------------------------+----------------

[Illustration: _PTEROCARYA CAUCASICA AT CLAREMONT, ESHER. (Largest
specimen in England. Height 45 ft., girth of stem 3 ft., from the ground
17 ft., spread of branches 110 yards)._]

[Illustration: _THE CORK OAK (Quercus Suber) AT SWALLOWFIELD PARK._]

-------------------+-----------+--------------------------+---------------