Head along Portugal Street and on into the pedestrianized Portugal Place. The small triangular enclosed garden on your left contains a lovely old (32) Common Pear, recognisable by the distinctive square-cracked bark, and more easily in season, by the developing pears, which are rounder and smaller than the more familiar edible pears of cultivated forms.

Turn sharp left down the side of this garden, pausing as briefly as possible by the (33) Sycamore (note that its leaves are more rounded than those of Norway Maple) - a typical example of a usually scruffy tree, although there is a very fine mature tree in front of St Luke's Church in Victoria Road, the exception that proves the rule perhaps!

Turn right at the end of the passageway past the multi-storey car park, noting the two Pillar Apples off to your left in front of the terrace of houses in Lower Park Street. The first two trees on your right belong to the fifth and final lime species of the tour - (34) Crimean Lime. This has darker and glossier leaves than Common Lime and therefore does not attract the aphid honeydew and sooty mould problems suffered by the latter, but it is an ugly tree in winter, all misshapen haphazard branches, often descending in a tangle to the ground. The tree on the corner of Round Church Street (next to another Crimean Lime) is the (35) ‘Fastigiata’ cultivar of Common Hornbeam, which we saw earlier. It is an ideal tree for street corners as it does not spread too widely and grows to a highly predictable shape. On the other side of the road you have just passed a Silver Maple, an English Oak and a Tree of Heaven, all of which we have already seen.

Cross over the road now to the three conifers just beyond them. Conifers tend to struggle on the chalky soils and dry (honest!) climate of Cambridge, although there are some quite decent trees west of Cambridge on the greensand towards Madingley and Histon. These three trees are representatives of the three most widely-planted cypress family species, neatly laid out in a row for comparison. The first tree with rather shiny, fairly broad-threaded foliage is a (36) Western Red Cedar or Thuja. It has vase-shaped cones and on sunny days it has a rather sickly orange smell. The second tree is a (37) Lawson Cypress cultivar with parsley-scented foliage and small round cones. This cultivar is a golden form with stiffer foliage sprays than the type tree. And the third tree is that scourge of good-neighbourliness, a (38) Leylandii, a strange hybrid tree which grows very fast, rarely bothers to produce cones, and has foliage which neither forms flat sprays (like the other two), nor is truly arranged three-dimensionally like the so-called ‘true’ cypresses.

Turn back across the road (passing another Lawson's Cypress and a Ginkgo) and walk up Round Church Street. In the corner of Round Church Churchyard on your left the tree with large lobed leaves is a (39) Fig. This is an increasingly popular tree, particularly with warmer summers which mean the figs might actually get to ripen! Next to it is a (40) Common Holly which needs no introduction. Across from Round Church Street are two large fastigiate (vertically-branching) beech trees, a type known as (41) Dawyck Beech and derived from a single tree found growing like that somewhere in Scotland in late Victorian times. A great tree for making the most of a limited (horizontal) space!

Turn left down Bridge Street with the Round Church on your left. The birch tree in the churchyard is a (42) Himalayan Birch planted for its very white bark. It is very similar to the Paper-bark Birch we saw earlier, but neater and with shinier leaves, and usually with a distinctively fluted trunk.

Continue down Bridge Street and its continuation as Sidney Street (there are some large specimens of Common Beech and its purple form Copper Beech behind the wall of Sidney Sussex College on your left). Turn left at Sussex Place past two Paper-bark Birch trees and turn right into Hobson Street. One last tree before we return to the bus station; towards the end of HobsonStreet on the left behind the gate leading to Christ's College Master's Lodge is a very fine (43) Hybrid Wingnut. This is the hybrid of Caucasian and Chinese Wingnut, both of which we saw earlier on Christ's Pieces. If you can reach any, you will see the fruit is intermediate between the two species, as are the leaves, with the leaf-flanges of Chinese Wingnut contributing an unusual grooving to the leaf-stalk. A superb tree, pity it is inaccessible!

Time to return to the bus station (if you wish to catch a bus that is, or to complete the round!), passing a Ginkgo in front of Lloyds Bank, a fine Weeping Ash in St Andrews the Great Churchyard, and a rather forlorn, probably fastigiate, Norway Maple on the pavement in front of the church, and then back either through what used to be Bradwell's Court, or along to the road junction and left along Emmanuel Street.