382 HORTUS MORTOLENSIS 
Bitter Orange, see the full account in Flickiger & Hanbury, 
Pharmacographia, pp. 103-116, second edition, pp. 114-129.* 
CLISTOYUCCA. 
A monotypic genus, very near to Yucca, and chiefly differenti- 
ated through the absence of the style. Seeds were kindly sent by 
Prof. Trelease in August, 1909. It is the “Joshua tree” of the 
Mohave desert, ‘‘ the most imposing of the Yuccee of the United 
States.” 
CoccINIA SESSILIFOLIA. 
Was sent by Mr. K. Dinter from German S.W. Africa. It 
is an interesting climber with an enormously thick and long 
irregular tuber and pretty leaves and flowers. It dies down every 
autumn. . 
Cocos. 
Of these very beautiful palms some extra-tropical species are 
much grown in the gardens of the Riviera, but generally under 
wrong names. They form the subject of an elaborate paper 
by Odoardo Beccari,+ which unfortunately contains neither an 
analytical key nor descriptive notes. 
Only two sections are represented in our garden, namely 
Arecastrum and Butia. 
The former is easily known by its smooth and tall stems on 
which the leaf scars form distant rings. The leaves, which have 
a long base almost like a sheath, are bright green; the pinne or 
leaflets being plumose in arrangement. 
C. Romanzoffiana is the only species of the section Arecastrwm 
grown at La Mortola. Barbosa Rodrigues considers C. australis 
Mart., C. pluwmosa Hook. fil., C. Datil Gris., C. Geriba Barb. 
Rodr., C. acrocomioides Drude, and C. Martiana Drude and Glz., 
as mere synonyms of it. He nevertheless figures eight different 
forms, but assures us that they all belong to one and the same 
species. No doubt most of these forms have been introduced 
into Europe, and are also grown on the Riviera. The future 
will show whether they are only forms. The one which I keep 
here as var. plwmosa Hort. has a strong and stout stem and 
rounded seeds. 
The species which form the section Butia are very different 
from those just mentioned. In habit they have much in common 
with the species of Phenix, and form, when old, a stem like 
these. Four species are in cultivation, occurring in gardens under 
a good many wrong names. Without flowers and seeds they are 
* For a further account of the ‘‘ Agrumi,’”’ see Gallesio’s and Risso’s 
works; further, Dr. Bonavia, The Cultivated Oranges and Lemons of India 
and Ceylon; Engler in Engler und Prantl, Natiirliche Pfanzenfamilien, iii. 4, 
p. 195; O. Penzig, Studi Botanici sugli Agrumi, and Strasburger’s Rambles on 
the Riviera. 
+ ‘‘Le Palme incluse nel genere Cocos.’’ Malpighia, vols. i. and ii. 
{ T. Barbosa Rodrigues, Palme Mattogrossenses Nove vel minus Cognite, &e. 
Rio de Janeiro, 1898, pp. 13-18, t. iv. 
