438 HORTUS MORTOLENSIS 
a second with medium sized and always canaliculate leaves (the 
type); anda third one with shorter, stiffer, more rigidly spreading, 
paler green leaves. This is the var. Ghiesbreghtw. Of Y. 
australis, with large pendulous inflorescences, we have one old 
specimen, which has flowered repeatedly. A very fine plant of it 
may be seen at Villa Thuret, at Antibes. Y. Treculeana, another 
arborescent species, was bought by Mr. Daniel Hanbury from 
M. Van Geert, of Ghent, in August, 1872. 
Seeds collected from wild specimens of Y. baccata, Y. brevi- 
folia, Y. constricta, Y. flaccida var. glaucescens, Y. glauca, Y. 
mohavensts, Y. radiosa, Y. rigida, Y. rostrata, and Y. rupicola 
were received about ten years ago from Prof. Wm. Trelease ; also 
Y. decipiens (as Y. valida), which he had collected near Gutierrez, 
in Mexico. Y. valida we received at about the same time from 
Mr. C. A. Purpus, from Lower California. 
Y. Mazeli, another tall and arborescent species, often grown 
on the Riviera, is doubtfully referred by Prof. Trelease to Y. 
Schotti, from which it seems to differ only in having the leaves 
persistently a little denticulate. There is a fine specimen of it at 
Villa Thuret, at Antibes. 
Y. Hanburw, described by Mr. Baker in the Kew Bulletin 
1892, 8. 217, I could not find in the garden. Prof. Trelease in 
his monograph (Rept. Miss. Bot. Gard. 1902, 60) refers this 
doubtfully to Y. glauca. 
ZANTHOXYLON. 
4. alatwm was first planted by Sir Thomas Hanbury on Novem- 
ber 27th, 1868, having been procured from Messrs. Veitch & Sons. 
It was raised again from seeds sent by Mr. D. Hanbury, November, 
1871. This plant is very sensitive to drought. As soon as it begins 
to suffer it rolls back its leaves, so that their under side is con- 
cealed; afew drops of rain cause them to flatten out again. Of 
the deciduous Z. Bunge seeds were sent by Mr. D. Hankury in 
June, 1872. 
ZIZYPHUS. 
Z. mucronatus was received from Cav. C. Sprenger, of Naples, 
in October, 1901, and also at about the same time from Mr. K. 
Dinter, of Okahandja in German South West Africa. Z. sativa 
is cultivated in Southern Europe for its fruit, which ripens in 
September-October. 
I wish to express my thanks to those who have given me 
their kind assistance in compiling this Catalogue, especially 
to Mr. James Britten, F.L.S., Mr. Clarence Bicknell, M.A., of 
Bordighera, and to Mr. Alban Voigt, of Dresden. 
A. Bs 
La Mortola: Easter, 1912. 
