. The Cactaceae : descriptions and illustrations of plants of the cactus family. 114 THE CACTACEAE. 69. Neomammillaria aureiceps (Lemaire). Mammillaria aureiceps Lemaire, Cact. Aliq. Nov. 8. 1838. MammiUaria rhodantha aureiceps Salm-Dyck, Cact. Hort. Dyck. 1844. 7. 1845. Cactus aureiceps Kuntze, Rev. Gen. PI. i: 260. 1891. Globose to short-oblong, 8 to 10 cm. in diameter; tubercles short, terete in section, woolly and setose in their axils; radial spines about 20, bristle-like, white, 5 to 8 mm. long, spreading; central spines several, sometimes as many as 9, yellow, stouter and longer than th
. The Cactaceae : descriptions and illustrations of plants of the cactus family. 114 THE CACTACEAE. 69. Neomammillaria aureiceps (Lemaire). Mammillaria aureiceps Lemaire, Cact. Aliq. Nov. 8. 1838. MammiUaria rhodantha aureiceps Salm-Dyck, Cact. Hort. Dyck. 1844. 7. 1845. Cactus aureiceps Kuntze, Rev. Gen. PI. i: 260. 1891. Globose to short-oblong, 8 to 10 cm. in diameter; tubercles short, terete in section, woolly and setose in their axils; radial spines about 20, bristle-like, white, 5 to 8 mm. long, spreading; central spines several, sometimes as many as 9, yellow, stouter and longer than the radials, 10 to 14 mm. long, somewhat spreading and a little cun-ed inward: flowers small, dark red. Type locality: Mexico. Distribution: Valley of Mexico. Our description is based on specimens recently sent us by Dr. Karl Reiche as Mam- millaria rhodantha, under which name it usually passes. Jl/. rhodantha, however, has dif- ferent spines and is more strictly a mountain species. Plate IX, figure 3, shows a plant sent from the Edinburgh Botanical Garden in 1902 as Mammillaria rliodantha which flowered in the Xew^ York Botanical Garden, October 15, 1912. Figvu^es 117 and iiS give two views of this plant sent us by_Dr. Reiche from the Valley of i Fig. 119.âXeomamniillaria yucatanensis. -Neomanunillaria ruestii. 70. Neomammillaria yucatanensis sp. nov. Plants in clumps of 4, erect, cylindric, not milky, 10 to 15 cm. long, 3 to 6 cm. in diameter, ver\^ spiny; tubercles conic, woolly in their axils but not setose; radial spines about 20, white, spreading, aciciilar; central spines 4 or rareh- 5, much stouter than the radials, 6 to 8 mm. long, slightly spread- ing above, yellowish brown; "flowers ver\' small, rose; fruit oblong, bright ; Collected by George F. Gaumer at Progreso, Yucatan, Mexico, in 1918 (No. 23939) and again in 1921 (No. 24367, t}^e). â \Ve have not seen this species in flower or fruit but Dr. Gaumer has described them as above. He says tha
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