20 TRANS. ST. LOUIS ACAD. SCIENCE. [180 
1. P. Massoniana, Lamb. Parlat., well distinguished from the tree thus 
named by Siebold & Zuccarini and by Endlicher, which was named by 
Parlatore P. Thunbergii (see note 26). It is similar to the last, but has 
longer and more slender leaves and is a native of the warmer climate of 
Southern China, and is not hardy where densifora and Thunbergii are. 
Ducts few or many, often with a few strengthening cells, these cells also in 
the corners, very few under the epidermis, rarely some with the vessels; 
male flowers slender, cylindric, 6-8 lines long, in a spike, involucrum of 
6 or 7 bracts, the outer pair rather shorter than the inner ones. Griffith, 
©. 4992, from Afghanistan, in Herb. Kew, with 2 ducts on the upper side 
of the broader leaves, may belong here, which would extend the geogra- 
phical area of this species. 
. P. Merkusii, Jangh. & De Vriese, seems to be closely allied to the 
last ‘and probably belongs here, or ought perhaps to be considered rather a 
two-leaved Jvdica. In the poor specimens at my disposal I could not dis- 
cells similarly disposed. The involucrum consists of 12 bracts, the outer 
pair not half as long as the inner o 
13. P. Gerardiana, Wallich. pen crests semi-orbicular, laciniate- 
neti seeds nearly 1 inch long. 
. P. Halepensis, Mill. Cones with longer or shorter peduncles, lateral 
oa often low down on the axis, generally single, with flat or sometimes 
pene tumid scales 
P. Pyrenaica, peg fide Parlatore, P. Brutia, Ten., and with 
yay synonyms, not to be confounded with that other P. Pyrenxaica which 
is a form of P. Laricio. This species is so closely allied to the last that it 
is often considered a variety of it. But the leaves are stouter, the more 
numerous duc surrounded by strengthening cells, which are very 
scarce in the AGC of the other; in both e cells are found near th 
vessels; the male flowers are twice as large; the outer pair of involu- 
cral bracts is ae equal to the inner ones; the cones are nearly sessile 
and thicker, generally several — and often lateral and terminal on 
the same tree (see p. 171); the densely clustered cones in pean s Sasa 
specimen in the botanic atti n of Naples are the pag of disea 
16. haa latone Schiede & Deppe, has often6a ven vies aves; th 
ducts are very s and often wanting; the media cells, usually - 
well developed in  Saatiee under the epidermis, are, as well as the ducts, 
absent in Gregg’s No. 821 from Zamora; the sheaths are usually decidu- 
ous, but plan er) so in Hartweg’s No. 441. \ ; 
17. P. filifolia, Lindl. In ods xa cultivated in Kew gardens the 
sar are sometimes intern 
. Montezuma, Lam , is, if I understand it correctly, a most vari- 
atis § species, the largest suit re different forms of which is preserved in the 
Berlin herbarium ; some forms have longer, others anaes leaves, or stouter 
*more slender ones, 3, 4or 5 in a bundle; cones long cylindrical or oval 
or conical; the scales in the typical form are depressed and regularly rhom- 
- boidal, in other forms they become strongly umbonate. It is quite diffi- 
