. Carnegie Institution of Washington publication. LEMAIREOCEREUS. 103 Plate xv, figure 2, shows the top of a plant brought by Dr. Ros'e from Cuernavaca, Morelos, Mexico, in 1906. Figure 152 shows the fruit of a plant from Hidalgo; figure 153 is from a photograph taken by him in Hidalgo, Mexico, in 1905. SPECIES NOT GROUPED. LEMAIREOCEREUS SCHUMANNII (Mathsson) Britton and Rose, Contr. U. S. Nat. Herb. 12: 425. 1909. Cereus schiimannii Mathsson in Schumann, Monatsschr. Kakteenk. 9: 131. 1899. Plants tall and stout, 15 meters high, with few branches; ribs 8, thick and high, very obtuse, somewhat
. Carnegie Institution of Washington publication. LEMAIREOCEREUS. 103 Plate xv, figure 2, shows the top of a plant brought by Dr. Ros'e from Cuernavaca, Morelos, Mexico, in 1906. Figure 152 shows the fruit of a plant from Hidalgo; figure 153 is from a photograph taken by him in Hidalgo, Mexico, in 1905. SPECIES NOT GROUPED. LEMAIREOCEREUS SCHUMANNII (Mathsson) Britton and Rose, Contr. U. S. Nat. Herb. 12: 425. 1909. Cereus schiimannii Mathsson in Schumann, Monatsschr. Kakteenk. 9: 131. 1899. Plants tall and stout, 15 meters high, with few branches; ribs 8, thick and high, very obtuse, somewhat pruinose; spines 6 or 7, radial, i central, all white with brown tips; flowers and fruit unknown. Type locality: Honduras. Distribution: Known only in cultivation. Little is known regarding this species and from the brief description we are unable to place it definitely in our key. It may be only a form of L. griseus so widely cultivated in Mexico and Central America and is near L. aragonii and possibly not specifically distinct. LEMAIREOCEREUS sp. Cereus rigidispinus Monville, Hort. Univ. i: 223. 1840. "Erect, stout, dark green, somewhat glaucous; ribs thick, rounded; sinuses open, deep, acute. Spines very strong and stiff, whitish, divaricate. Trunk 2J4' feet in diameter, having 7 ribs about 9 lines by 5 lines thick at the middle. Areoles 6 to 10 lines apart, a little sunken, subovate, a little convex, covered with a very short grayish nap, bearing 6 to 8 very unequal spines, the strongest, as well as the weakest, arising from no particular point, 3 to 13 lines long and J4 to i line in diameter, all exceedingly stiff, whitish and black at the tip, sometimes 2 centrals or larger ones united along their entire length. Habitat: Mexico. Flowers and fruit unknown. This plant should be placed in Cat. Monv. between Cer. hvstrix and ebiirneus. In spite of its peculiar appearance, it shows some similarities to them, especially to the ; (Translated from De Monville, H
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