Answer: Monrovia grows two Chinese elms:
Ulmus parvifolia 'Sempervirens', the Chinese Evergreen Elm is a semi-evergreen depending on climate. It has a round-headed, weeping habit formed by broadly spreading arching branches. The finely toothed, small green leaves are retained until new leaves develop. It grows best in full sun. Moderately fast-growing to 40 to 50 feet high, 50 to 60 feet wide.
Ulmus parvifolia 'Drake' is Drake's Chinese Elm. Its attractive round headed canopy forms a broad, spreading crown with pendant branches. The shedding bark on older trees is interesting and adds to its attraction. It, too, is semi-evergreen, grows best in full sun, and reaches 30 to 35 feet tall, 40 to 45 feet wide.
The tree you've described with upright branches is probably Ulmus parvifolia 'Allee'. It's a vase-shaped tree growing 70' tall and about 60' wide. Hope this information helps you solve the mystery!
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