Spring-shoots multinodal, more or less pruinose. Bark-formation early, the scales deciduous, the upper trunk and branches red. Leaves prevalently ternate but sometimes in fascicles of 4 or 5, from 15 to 30 cm. long, slender and gracefully drooping; resin-ducts medial or with an occasional internal duct, hypoderm weak, of uniform thin-walled cells. Conelets mucronate. Cones from 6 to 11 cm. long, in crowded verticillate clusters, sessile, reflexed, ovate-conic, oblique, persistent and serotinous; apophyses lustrous nut-brown, more or less tumid, the posterior gradually larger than the anterior scales, the umbo flat or depressed, the mucro wanting. Patula grows in the warm-temperate climates of Hidalgo, Puebla and Vera Cruz, in eastern and central Mexico. It can be at once recognized by its slender drooping foliage, its persistent cones, and its red upper trunk. It is cultivated in northern Italy and in the warmer parts of Great Britain. Plate XXXVI. Fig. 307, Cone. Fig. 308, Conelet. Fig. 309, Leaf-fascicle and magnified leaf-section. Fig. 310, Branchlet with drooping leaves. [Illustration: PLATE XXXVI. P. PATULA (307-310), GREGGII (311-314)] 61. PINUS MURICATA 1837 P. muricata D. Don in Trans. Linn. Soc. xvii. 441. 1848 P. Edgariana Hartweg in Jour. Hort. Soc. Lond. iii. 217. Spring-shoots multinodal. Leaves binate, from 10 to 15 cm. long; resin-ducts medial, hypoderm biform. Scales of the conelet prolonged into a triangular spine. Cones from 5 to 9 cm. long, in verticillate clusters, sessile, reflexed, ovate-conic, oblique, serotinous; apophyses lustrous nut-brown, abruptly much larger on the posterior face of the cone, each armed with a formidable spine varying in size with the varying size of the apophysis. This species grows on the coast of California, in scattered stations between Mendocino and San Luis Obispo Counties, and on the northwest coast of Lower California and on Cedros Island. It is recognized by its oblique cones, conspicuously spinose, indefinitely persistent and very serotinous. The unequal development of its cone-scales distinguishes the cone from the more symmetrically developed cone of P. pungens. Fruiting trees of P. muricata may be seen in the Royal Gardens at Kew. Plate XXXVII. Fig. 315, Cone. Fig. 316, Leaf-fascicle and magnified leaf-section. 62. PINUS ATTENUATA 1847 P. californica Hartweg in Jour. Hort. Soc. Lond. ii. 189, (not? P. CALIFORNIANA, Loiseleur). 1849 P. tuberculata Gordon in Jour. Hort. Soc. Lond. iv. 218, f. (not D. Don). 1892 P. attenuata Lemmon in Mining & Sci. Press, lxiv. 45.