371 
Extending from San Antonio, Texas, westward to the region of Fagle 
Pass and I] Paso and southward into Coahuila and Chihuahua. 
Specimens examined: TEXAS ( Lindheimer of 1846, near San Antonio; 
Schott of 1852, at Eagle Pass; Bigelow of 1852, 1854, at Kagle Pass; 
Evans of 1891, near El Paso; Neally of 1801, near Camp Hudson): also 
specimens cultivated in St, Louis in 1546, 1847, 1849, 1855, 1899, 
The two forms of this well known species seem worthy of separation. Although 
there is much intergrading where the two ranges overlap, the extreme eastern and 
northern forms seem almost specifically distinct from those of the extreme west. 
+ + + Spines never hooked, 
++ Ribs very numerous, crowded, acutely compressed, and wavy: upper (usually radial) 
spine broad, thin and flat, the others teretish. 
33. Echinocactus phyllacanthus Mart.; Otto & Dietr. Allg. Gart. Zeit. iv, 
201 (1836). 
From globose to cylindrical, with depressed vertex, simple or pro- 
liferous, 6 to 8.5 em, broad: ribs 40 to 55 (sometimes as few as 50), very 
much crowded and compressed, thin, acute, and very wavy, contin- 
uous or somewhat interrupted: radial spines 5 (sometimes 6 or 7), 
straight and spreading, the 2 lowest ones white, rigid, 4 to 6 mm. long, 
half as long as the 2 darker, angled, larger laterals, the uppermost 
spine thin and broad (3 mim.), channeled above, faintly annulate, flex- 
ible, grayish-pink, 15 to 25 mm. long; central spines none: flowers 
small, dirty white: fruit unknown.—Type unknown. 
San Luis Potosi, to southern Mexico. 
Specimens examined: SAN Luis Porosr (Parry & Palmer 269; 
Eschanzier of 1891): also specimens cultivated in Hort. Jacoby in 1807, 
and in Mo. Bot. Gard. in 1879. 
The specific name refers to the thin and broad flexible “ leaf-like” upper spine. 
34. Echinocactus lancifer Dietr. Allg. Gart. Zeit. vii, 154 (1839), 
Depressed, globose, 6 cm. in diameter, simple: ribs about 40, crowded 
and thin, very acute and wavy, scarcely interrupted: spines straw-color 
or very pale yellow; radials 7, the 4 lower ones short (9 to 6 mm.), rigid 
and recurved, the remaining ones annulate, angled, bulbous at base, 
the 2 laterals reflexed-spreading, 3 em. long, shorter than but similar 
to the solitary annulate central spine (which is often flattened toward 
the apex), and half as long as the broad, thin, and scarcely rigid upper- 
most radial, which is channeled above: flowers deep rose-color: fruit 
unknown.—Type unknown. 
San Luis Potosi. 
Specimens examined: San Luis Porost (schanzier of 1591). 
35. Echinocactus spinosus Wegener, Allg. Gart. Zeit. xii, 66 (1844). 
Echinocactus wippermanni Muhlenpt. Allg. Gart. Zeit. xiv, 370 (1846). 
Echinocactus acifer Hopf. ex Foerst. Hand, Cact.520 (1846), 
Depressed-globose, 6 em. in diameter, simple, densely woolly on the 
younger areolie: ribs 36 to 40, oblique, crowded, thin and acute, very 
