OF THE GENUS PINUS. 577 
IMPERFECTLY-KNOWN SPECIES (see posé). 
P. recurvata, Rovwlee. 
P. yunnanensis, Franchet. 
P. vermicularis, Janke. 
P. leucosperma, Maximovwicz, 
P. eldarica, Medwejew?. 
IncIDENTAL REMARKS ON THE SPECIES OF PiINUvs. 
The species hereinafter referred to are for the most part named 
in accordance with Parlatore’s monograph in De Candolle’s 
‘ Prodromus,’ xvi. fase. 2 (1868), Engelmann’s “ Revision ” in the 
‘ Transactions of the Academy of St. Louis’ (1880), and, to a 
less extent, in conformity with Sargent’s ‘Silva’ (1897). Full 
descriptions, synonyms, and references to figures are given in 
those works, which it is not necessary to repeat here. The 
excellent figures in Loudon’s ‘ Encyclopedia of Trees and Shrubs’ 
(1842) should be consulted by all students, as well as those given 
in the ‘Journal of the Horticultural Society,’ vol. i. (1846), vol. ii. 
(1847), vol. iv. (1849), the ‘ Pinetum Britannicum,’ the ‘ Gardeners’ 
Chronicle,’ and the more recent publications of Beissner and 
Veitch. It is desirable to repeat that Parlatore treated the genus 
in a much wider sense than is here done, embracing indeed in 
his Pinus almost all the Abietinew, so that the present remarks 
apply only to his subgenus Pinus. The additions and changes 
that have become necessary are given under the head of individual 
species. References to the more recent literature will also be 
found under the same headings. 
1. P. penrapHyia, the Goyd Matsu of the Japanese, was first 
described by Mayr in his‘ Monographie der Abietineen des Japan- 
ischen Reiches’ (1890), tab. vi. fig. 20. It was found growing 
wild in the mountains of Central Japan, and is the Japanese 
analogue of the North-east American P. Strobus. 
The triangular leaves have a circular or sometimes a three- 
sided meristele with a single fibro-vascular bundle. The endo- 
derm-layer consists of about a dozen large cells. The resin- 
canals are subepidermal, i. e. marginal. The cones in the Abbe 
Faurie’s specimens are about 3 inches long, subsessile, spreading, 
oblong-conie ; scales roundish in outline, flattish. The bark is 
studded with black tubercles. 
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