ENGELMANN REVISION OF THE GENUS PINUS, ETC, 183 



ally slender cone of this, and that P. Sinclairii, Hook. & Arnott, is a fac- 

 titious species compounded of a cone of this and a branch of P. Monte- 

 zumm. The old and evidently erroneously described P. Calif orniana, 

 Lois., is probably our species; but cannot now be identified. 



30. P. tuberculata, Gordon Pinet. ed. i, 211, not Don, a name at first 

 erroneously given to a species sent by Jeffrey, is to be retained as now in 

 general use and because Don's original tubercnlata is a mere form oUnsig- 

 nis. P. Californica, Hartw., is the same. It is the smallest pine known 

 as a tree, fruiting often when only 2 to 3 feet high and rarely ever exceed, 

 ing 15 or 18 feet. (See Engelm. in Flor. Calif. 2, 128.) 



31. P. TcBda, Lin., and P. rigida, Mill., have sometimes, besides the 

 regular parenchymatous, smaller, accessory internal ducts, thus approach- 

 ing the Australes group. The cones are of a pale brown color, mostly 

 very spinous, and very rarely serotinous. It is confined to the wet or 

 sandy lower districts along the coast from Delaware to Eastern Texas. 

 The most inland localities may be the Stone Mountain near Atlanta, 

 Georgia, and Camden in Arkansas. 



32. P. rigida var. serotina, P. serotifia, Michx., I cannot distinguish 

 specifically from rigida ; it is more apt to grow on wet places (whence 

 the name Pond-pins) and has longer leaves (occasionally, on strong 

 shoots, in fours), and the cones often do remain closed for several years, 

 as is also sometimes found in the northern P. rigida. The typical sub- 

 globose form of the cones which Michaux figures in his Sylva is quite pecu- 

 liar, but only found in the coast region of South Carolina, from whence 

 Dr. Mellichamp sends them ; further inland the cones are more elongated, 

 often twice as long as in the northern rigida (Wm. H. Ravenel, Aiken, 

 S. C.) Prof. Sargent observed it on the Georgia and East Florida coast, 

 but not in West Florida or in Alabama. Felled trees or posts set in the 

 ground sometimes make sprouts bearing primary leaves. 



33. P. patula, Schiede & Deppe. The epidermis cells of the leaves 

 protrude so that the surface appears minutely tuberculate. 



34. P. inopH, var. clatisa, was discovered and named by Dr. Chapman 

 at Apalachicola, Florida, and Prof. Sargent finds it quite common on 

 Cedar Keys. It is distinguished from the species by decidedly narrower 

 leaves and by its cones being often serotinous, more in one tree than in 

 another. The leaves are h line wide, while in the species they are often | 

 and even nearly i line wide; the sheaths in both forms are at last decidu- 

 ous; young branches green, in the northern form glaucous; involucrum 

 of 10 to II, in inops of S to 9 bracts; cones larger, mostly subsessile, 

 recurved ; in the other, mostly longer peduncled and patulous; cotyledons 

 fewer, 4 or rarely 5, in the other 5 or 6. 



35. P. pungefis, Michx. Leaves rarely in threes and sometimes with 

 accessory internal ducts. The cones persist sometimes 20 years or longer. 



36. P. tnurirala, Don. Male flowers only h inch long in a spike of 

 about I inch in length, similar to those of tuberculata and iusignis; an- 



heral crest strongly denticulate, in the others nearly entire. Specimens 



