ENGELMANN REVISION OF THE GENUS PINUS, ETC. 1 85 



common in Northern Michigan and Wisconsin, it does not seem to 

 extend farther westward than the Saskatchawan, where it is replaced by 

 P. co7itorta. 



41. P. oocaypa, Schiede. Most of tlie ducts are internal; occasionally 

 a parenchymatous one was found in the leaves examined by me. Further 

 investigation must show whether this species may not more properly be re- 

 ferred to its Mexican neighbors of the Pseudo-Strobi ^row^. Strengthen- 

 ing cells are abundant around, under the epidermis and also near the vessels. 



42. P. australis, Michx. Male flowers 2^-3 inches long, the longest of 

 any pine, of rose-purple color; lowest pair of involucral bracts minute. 

 On a very vigorous shoot I have seen the female anient lateral (see p. 170), 

 a rare anomaly. In the germinating plantlet, the long wing remaining 

 attached to the seed shell is raised up like a flag by the growing cotyled- 

 onous leaves. 



43. P. Elliotiii, Engelm. For a full account see below. 



44. P. Cubetisis, Griseb. Leaves in threes, only exceptionallj' in twos, 

 8-10 inches long, rarely longer, stout, about | line wide, rigid, strength- 

 ening cells largely developed under the epidermis (so that their bundles 

 sometimes extend from the epidermis to the ducts) and also near the ves- 

 sels; bracts 3-3^ lines long, strongly fringed, reflexed, rather persistent ; 

 male flowers about I5 inches long; involucral bracts 13-15, the outer pair 

 half as long as the inner ones ; anther-crests scarcely denticulate ; cones 

 21^-3 inches long, short-peduncled, scales depressed; seeds 3^ lines long, 

 faintly ridged; wing nearly twice as long, widest at base, tapering to an 

 acutish point. The var. tertrocarpa, Wright, in Gris. Cat. Cub. 217, is a 

 very curious form but not a variety. It seems that in this case the growth 

 of the axis is entirely arrested after producing an ament, and does not 

 €ven elongate in the following season ; the maturing cone, therefore, re- 

 mains erect near the top of the branch. I have seen an analogous arrest 

 of growth in the biennially-maturing ^uercus ckrysolepts. It is found in 

 diflierent parts of Cuba, in the maritime districts as well as on the moun- 

 tains, and is probably the same that gives the name to the Isle of Pines. 

 A cone from the Bahama Islands, preserved in the Kew Museum under 

 the name oi P. Tivda, probably also belongs here. 



45. P. Wrtgkfii, Engelm. n. sp. Leaves in twos, very rarely in threes, 

 slender. 5 to 8 inches long, 3^2 ''"s o'" '^ss wide; sheaths 4 lines long, with 

 age a little shorter; bracts small (i^ lines long), very slightly fringed 

 and rather deciduous ; cones lateral, peduncled, recurved, oval, i^ to 2J 

 inches long, scales radiately grooved, thickened on the crenulated edge, 

 apophyses retused, umbo immersed, prickles short; seeds 2^ lines long, 

 faintly ridged, wings (perhaps incomplete ?J not much longer, widest above 

 the base. — Mountains in Eastern Cuba, apparently mixed with the last, 

 Chs. Wright No. 1462 in part, 3190. Distinguished from the allied P. 

 Cubensis by its slender binate leaves, short, scarcely fringed deciduous 

 bracts and smaller cones and seeds. I have not seen the male flowers. 

 The cone-scales of both species are arranged in the || order, the 8 and 13 

 spirals being the most prominent. 



