NOTES 419 
spines almost black. P. canariensis is the most decorative and 
most generally planted species along the coast. It is very hardy, 
succeeds on every soil, and ripens annually a great quantity of seeds. 
Many other forms are grown onthe Riviera. Theirnomenclature 
is much confused, and-a thorough study of them is much needed. 
I am greatly indebted to Dr. Odoardo Beccari, of Florence, for 
helping me to name the Phenix and other palms of this garden. 
PHYLLOCACTUS. 
A genus of Cactace@, with flat leaf-like stems and showy 
flowers. Several are quite hardy in half-shady places, and can 
also be grown epiphytically. P. anguliger and P. latifrons were 
first brought here by Mr. Daniel Hanbury from Kew in July, 1868. 
Other species were received from various sources. P. grandis was 
brought from Palermo Botanic Garden in 1901. Besides the species 
enumerated in the Catalogue a great number of hybrids are 
cultivated. 
PHYLLOCLADUS. 
P. trichomanoides. We have always had great difficulty in 
growing this plant, for which the climate and soil are little adapted. 
PICEA. 
P. excelsa, a native of our Alps, just manages to exist in the 
shadiest place of the valley, but succeeds quite well near Bordi- 
ghera. We are more successful with the Himalayan P. Morinda. 
PILOCARPUS. 
P. pennatifolius* was received from the Strassburg Botanic 
Garden through Prof. Fliickiger in June, 1880. It is nowa hand- 
some and dense round bush, 3:20 m. high and 3:00 m. broad. 
The plant received under the name of P. racemosus seems scarcely 
to differ. 
PINGUICULA. 
P. grandiflora; this dainty little plant is a native of wet rocks 
in the Roja valley between Fontan and San Dalmazzo, whence 
Sir Thomas Hanbury annually used to bring a supply of fresh 
specimens, which were planted on a wet wall. 
PINus. 
We have tried a great number of species, but only a few have 
succeeded. The finest pine of the garden, with an elegant 
pyramidal growth, is P. canariensis. Thirty young trees were 
procured by Mr. Daniel Hanbury from M. Nabonnand, Golfe-Juan, 
in November, 1870. The largest specimen now in the garden is 
23 m. high and has a stem of 2°40 m. circumference at the base. 
The species is extremely resinous. 
* See the interesting history of this plant in Fliickiger & Hanbury, 
Pharmacographia, second edition, p. 113; and the recent study of the species, 
founded partly on material from La Mortola, by R. Jenzer, Pharmakognostische 
Untersuchungen iiber Pilocarpus pennatifolius Lem., &c. Ziirich, 1910. 
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