. Carnegie Institution of Washington publication. ECHINOFOSSULOCACTUS. 115 Type locality: Zacatecas, Mexico. Distribution: Zacatecas and Agiias Calientes. Our description is drawn in part from a plant sent to the New York Botanical Gar- den by Mr. H. Donnerstein in 1908, which flowered in April 1921, and in part from speci- mens collected by W. E- Safford at Aguas Calientes, Mexico, in 1907 (No. 1359). Illustrations: Monatsschr. Kakteenk. 22: 103, as Echinocactus violaciflorus; Ann. Rep. Smiths. Inst. 1908: pi. 4, f. 5, as Echinocactus crispatus. Plate xxiii, figure 5, shows the plant collecte


. Carnegie Institution of Washington publication. ECHINOFOSSULOCACTUS. 115 Type locality: Zacatecas, Mexico. Distribution: Zacatecas and Agiias Calientes. Our description is drawn in part from a plant sent to the New York Botanical Gar- den by Mr. H. Donnerstein in 1908, which flowered in April 1921, and in part from speci- mens collected by W. E- Safford at Aguas Calientes, Mexico, in 1907 (No. 1359). Illustrations: Monatsschr. Kakteenk. 22: 103, as Echinocactus violaciflorus; Ann. Rep. Smiths. Inst. 1908: pi. 4, f. 5, as Echinocactus crispatus. Plate xxiii, figure 5, shows the plant collected by William E. Saf- ford, February 21, 1907 (No. 1359), which flowered in Washington and was painted May 9, 1907. Figure 121 is from a photograph of the same plant. 13. Echinofossulocactus obvallatus (De Candolle) Lawrence in Loudon, Card. Mag. 17: 317. 1841. Echinocactus obvallatus De Can- dolle, Prodr. 3: 462. 1828. Obovoid to globose, depressed at apex; ribs about 25, rather thin and undulate; spines about 8, 4 spines sub- ulate, ascending or spreading, 4 spines short, perhaps not one-fourth the length of the longer ones; flowers central, very large; perianth-segments linear-oblong. Type locality: Mexico. Distribution: Hidalgo, Mexico. This species is based on Mocifio and Sesse's illustration of Cactus obvallatus. We have been unable to refer here, with any degree of approximation, any Mexican material we have seen. Pfeiffer's plate 22 (Abbild. Beschr. Cact. 2:), originally referred here, must be quite distinct, for it has very differently shaped flowers, spines, and ribs. The Index Kewensis refers this illustration to Echinocactus lancifer of which it seems to be the type. Echinocactus obvallatus spinosior of Lemaire (Salm-Dyck, Cact. Hort. Dyck. 1849. 30. 1850) and also of Monville (Salm-Dyck, Cact. Hort. Dyck. 1844. 20. 1845) as well as va- riety pluricostatus Monville (Salm-Dyck, Cact. Hort. Dyck. 1844. 20. 1845) are all names without description. Echinocactus coptonogo


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