16 TRANS. ST. LOUIS ACAD. SCIENCE. [176 
2. Cum Ducts parenchymatous; leaves sparingly serrulate, 
scarcely denticaea at tip.—Europe and principally Asi 
P. Cembra,* Mandschurica, Koratensts. 
Sect. Il, PINASTER. Apophysis with a dorsal umbo, mostly armed, 
generally thicker; leaves 1 to 5 in a bundle, their sheaths usually 
rsistent; anthers mostly terminating in a semi-orbicular or al- 
most orbicular crest; wood generally harder, heavier, and more 
resinous. 
s A. Ducts inion al. 
a. Cones subterminal. 
3. INTEGRIFOLL®. Leaves smooth-edged, their sheaths ea 
anthers nice in a knob or a few teeth.— Western Nort 
ic ic 
exic 
Cones short jabalovees: with thick scales, unarmed; seeds large 
with a minute wing; leaves brotdes. ‘ 
P. Parryana, cembrotdes, emi monophy 
* Cones oval or elongated, se armed with a deciduous or 
persistent prickle or an —. seeds much saints than the wing, 
leaves in fives. Balfour 
P. Balfouriana,® (aristata). 
§ 4. SytvestTres. Leaves serrulate, their sheaths persistent; anthers 
crested or (onlyin P. aaa. merely knobbed.—Europe and Asia, 
one eee in America. 
* Leaves in a es; wings much Soar ee seeds.—East India 
and its islands. Judice 
P. Khasia," insularis,? ht eee , 
* Leaves in twos; strengthening cells abundant, hotaiaeed 
around ducts; fructification biennial, cones and s 
wings large. nse eae World, one phe in Genie 
eastern Americ 
Pi Ndi montana,® risinen densifiora,'° Massoniana,'! ? Mer- 
kustt.+? 
*** Leaves in twos; strengthening cells under the epidermis 
and around ducts; fructification triennial, cones and seeds 
large, wings rudimentary.—A sia Mediterranean species. 
P. Pinea. : 
4. Cones lateral. 
§ 5. HALEPENsEs.—Old World. 
* Leaves in threes, their sheaths deciduous; umbo very promi- 
nent; wings shorter than the large seeds. Gerardiane. Asia. 
P. Gerardiana,'* Bungeana. 
* Leaves in twos, their sheaths persistent; cones smoothish; 
wings much longer than the seeds. Euhalepenses.—Mediter- 
ranean regions. 
. 
