THE FLORA OF GAZALAND. 11 
dense bush, but on the whole the trees from Chibabava to Muchukwana, 
18 miles, remained much the same as those I have already enumerated. From 
here on to Chironda I met with a certain amount of //yphene ventricosa, 
but recognised little besides except Lecaniodiscus fravinifolia, Acacia caffra, 
and the Holarrhena, Ehretia, and Vangueria already mentioned. It was a 
decidedly broken piece of country and inferior in point of woods to that 
which I had just left. At Chironda the formation is а nummulitie limestone. 
This is still more in evidence about Boka and the Idunda River, and 
supports a good deal of dense bush, largely composed of species which I 
did not meet with elsewhere, although there was no marked change in the 
character of the open woods. А Millettia and Erythrovylon emarginatum 
were common in the denser patches at Chironda, and I also noted several 
other species which I had already collected in the Madanda ; but possibly the 
commonest and certainly the most striking shrub in flower at the time was 
Pavetta saligna, S. Moore. The journey from here was mostly downhill, and 
for some distanee through fine, big, open bush containing a large proportion 
of * Mukwakwa ” (Strychnos Burtoni), the fruits of which are extensively 
used by the natives as food, also a fine latex-yielding tree with handsome red 
fruits exactly resembling those of Carissa grandiflora, both in external 
and internal appearance and taste ; it has, however, only one large seed. 
Curiously enough, it is known to the local natives by the same name as 
that which the Zulus of Natal apply to that Carissa—* Umtungulu.” 
Some of the dense bush at Boka is very attractive. I saw some fine 
Khayas, а Millettia, a Croton, and an Oayanthus the foliage of which I was 
unable to distinguish from that of some of our Chirinda species, while the 
undergrowth was largely composed of an /soglossa identical in general 
appearance with /. mossambicensis of Chirinda. A short distance on, we 
crossed a beautiful clear limestone stream, the Idunda, with quite a large 
volume of water, and at once entered a fine piece of forest containing, 
amongst various species which I did not recognise and of which I was unable 
to obtain the flowers, some good-sized specimens of Ahaya nyasica and a 
number of very striking Sterculias with tall, straight, perfectly smooth 
greenish stems, rising to a great height before branching. From here on 
our path largely followed the river, which had quite changed its character 
since I last saw it, flowing now over a broad sandy bed and easily navigable 
to native dug-out canoes and probably larger craft. The trees were large, 
containing a fair proportion of palms, Kigelia, Trichilia, and other fine 
species, which grew often in clumps and gave the country a most park-like 
appearance. The natives here live largely by fishing, and had in many 
instances planted mango, cashew-nut, and Céara rubber-trees about their 
villages. А Brachystegia and Diplorhynchus mossambicensis were amongst 
other species not uncommon. А little further on, on ground that would 
have been swampy in the rains, Г passed a large number of the Acacia known 
