The North American Species of [11]
section.
26. Cactus rhodanthus (Link & Otto) Kuntze, Rev. Gen. Pl. 261 (1891).
Mamillaria rhodantha Link & Otto, Icon. t. 26 (1828-31) Mamillaria lanifera Haw. Phil. Mag. lxiii., 41 (), not Salm-Dyck (1850).
Oblong or subcylindric, 30 cm. or more high, 7.5 to 10 cm. in diameter, often forking from the middle: tubercles conical, 12 mm. long, 8 mm. in diameter, with woolly axils: radial spines 16 to 20, bristle-like, white, the lower longer (8 to 10 mm.); central spines 6 or 7, rigid, whitish with black tip, 12 mm. long: flowers rose color, 12 mm. in diameter: fruit 2.5 cm. long, cylindrical. (Ill. l. c.) Type unknown.
Referred to Mexico in general, but reported as yet from San Luis Potosi to southern Mexico. Fl. profusely all summer.
Specimens examined: San Luis Potosi (Bourgeau 47; Pringle 3679; Eschanzier of 1891): also growing in Mo. Bot. Gard. 1893.
The specimens of Bourgeau and Pringle have somewhat larger spines than the type, as indicated by the description.
27. Cactus rhodanthus sulphureospinus.
Mamillaria sulphurea Forst. Handb. Cact. (1846), not Cactus sulphureus Gill, (1830). Mamillaria rhodantha sulphurea Salm, Hurt. Cact. Dyck. 11 (1850).
Central spines sulphur-yellow; otherwise like the species. Type unknown.
San Luis Potosi.
Specimens examined: San Luis Potosi (Pfeiffer, with no number or date; Eschanzier of 1891).
The varietal distinction maintained seems a small one, but it is constant and striking, so far as can be discovered.
28. Cactus capillaris.
Mamillaria lanifera Salm, Cact. Hort. Dyck. 98 (1850), not Haw. Cactus laniferus Kuntze, Rev. Gen. Pl. 250 (1891).
Cylindrical and erect: tubercles crowded, conical, glaucous, with axillary bristles: radial spines capillary and very numerous, white and crisped, entirely covering the plant; central spines 4 to 6, rigid, straight and spreading, straw-colored, 8 to 12 mm. long: flowers equaling the tubercles, the yellow petals striped with red: fruit unknown. Type unknown.
Referred to Mexico in general, but definitely known only from Coahuila.
Specimens examined: Coahuila. (Palmer of 1880).
There is a confusion of synonymy between this species and C. rhodanthus, both having been named Mamillaria lanifera. The earlier M. lanifera of Haworth, however, is clearly M. rhodantha of Link & Otto; and although Prince Salm-Dyck revived the name for the present species, the law of homonyms will not permit it to stand. The name proposed refers to the abundant display of capillary radial spines, which is probably the most notable feature.
29. Cactus palmeri, sp. nov.
Cylindrical: tubercles crowded, glaucous, cylindrical (somewhat broadest above), about 4 mm. long, with dense axillary wool containing bristles: radial spines 25 to 30, very slender and white but rigid, about 5 mm. long, spreading or somewhat radiant, entangled with those of neighboring tubercles, and so covering the whole plant; central spines 3 to 5 (usually 4), more robust, erect or slightly divergent, brownish with darker tip, 7 to 8 mm. long: flowers small: fruit clavate and scarlet: seeds black and strongly pitted, 0.5 to 0.8 mm. in diameter. Type, Palmer 921 in U. S. Nat. Herb.
San Benito Island, off the west coast of lower California.
Specimens examined: Lower California, San Benito Island (Palmer 921 of 1889, reported as Mamillaria Goodrichii).
Very closely allied to C. capillaris of eastern Mexico.
30. Cactus stellatus Willd. Enum. Suppl. 30 (1813).
Cactus pusillus DC. Cat. Hort. Monsp. 184 (1813), not Haw. (1803). Mamillaria pusilla DC. Prod. iii. 459 (1828).
A very common West Indian species, apparently differing from the variety only in the very much fewer (12 to 20) radial spines, although numerous specimens, both dried and living, were examined for additional characters. This difference, however, is so constant and striking that, taken together with the wide geographical separation, it should stand as varietal.
31. Cactus stellatus texanus (Engelm.).
Mamillaria pusilla
26. Cactus rhodanthus (Link & Otto) Kuntze, Rev. Gen. Pl. 261 (1891).
Mamillaria rhodantha Link & Otto, Icon. t. 26 (1828-31) Mamillaria lanifera Haw. Phil. Mag. lxiii., 41 (), not Salm-Dyck (1850).
Oblong or subcylindric, 30 cm. or more high, 7.5 to 10 cm. in diameter, often forking from the middle: tubercles conical, 12 mm. long, 8 mm. in diameter, with woolly axils: radial spines 16 to 20, bristle-like, white, the lower longer (8 to 10 mm.); central spines 6 or 7, rigid, whitish with black tip, 12 mm. long: flowers rose color, 12 mm. in diameter: fruit 2.5 cm. long, cylindrical. (Ill. l. c.) Type unknown.
Referred to Mexico in general, but reported as yet from San Luis Potosi to southern Mexico. Fl. profusely all summer.
Specimens examined: San Luis Potosi (Bourgeau 47; Pringle 3679; Eschanzier of 1891): also growing in Mo. Bot. Gard. 1893.
The specimens of Bourgeau and Pringle have somewhat larger spines than the type, as indicated by the description.
27. Cactus rhodanthus sulphureospinus.
Mamillaria sulphurea Forst. Handb. Cact. (1846), not Cactus sulphureus Gill, (1830). Mamillaria rhodantha sulphurea Salm, Hurt. Cact. Dyck. 11 (1850).
Central spines sulphur-yellow; otherwise like the species. Type unknown.
San Luis Potosi.
Specimens examined: San Luis Potosi (Pfeiffer, with no number or date; Eschanzier of 1891).
The varietal distinction maintained seems a small one, but it is constant and striking, so far as can be discovered.
28. Cactus capillaris.
Mamillaria lanifera Salm, Cact. Hort. Dyck. 98 (1850), not Haw. Cactus laniferus Kuntze, Rev. Gen. Pl. 250 (1891).
Cylindrical and erect: tubercles crowded, conical, glaucous, with axillary bristles: radial spines capillary and very numerous, white and crisped, entirely covering the plant; central spines 4 to 6, rigid, straight and spreading, straw-colored, 8 to 12 mm. long: flowers equaling the tubercles, the yellow petals striped with red: fruit unknown. Type unknown.
Referred to Mexico in general, but definitely known only from Coahuila.
Specimens examined: Coahuila. (Palmer of 1880).
There is a confusion of synonymy between this species and C. rhodanthus, both having been named Mamillaria lanifera. The earlier M. lanifera of Haworth, however, is clearly M. rhodantha of Link & Otto; and although Prince Salm-Dyck revived the name for the present species, the law of homonyms will not permit it to stand. The name proposed refers to the abundant display of capillary radial spines, which is probably the most notable feature.
29. Cactus palmeri, sp. nov.
Cylindrical: tubercles crowded, glaucous, cylindrical (somewhat broadest above), about 4 mm. long, with dense axillary wool containing bristles: radial spines 25 to 30, very slender and white but rigid, about 5 mm. long, spreading or somewhat radiant, entangled with those of neighboring tubercles, and so covering the whole plant; central spines 3 to 5 (usually 4), more robust, erect or slightly divergent, brownish with darker tip, 7 to 8 mm. long: flowers small: fruit clavate and scarlet: seeds black and strongly pitted, 0.5 to 0.8 mm. in diameter. Type, Palmer 921 in U. S. Nat. Herb.
San Benito Island, off the west coast of lower California.
Specimens examined: Lower California, San Benito Island (Palmer 921 of 1889, reported as Mamillaria Goodrichii).
Very closely allied to C. capillaris of eastern Mexico.
30. Cactus stellatus Willd. Enum. Suppl. 30 (1813).
Cactus pusillus DC. Cat. Hort. Monsp. 184 (1813), not Haw. (1803). Mamillaria pusilla DC. Prod. iii. 459 (1828).
A very common West Indian species, apparently differing from the variety only in the very much fewer (12 to 20) radial spines, although numerous specimens, both dried and living, were examined for additional characters. This difference, however, is so constant and striking that, taken together with the wide geographical separation, it should stand as varietal.
31. Cactus stellatus texanus (Engelm.).
Mamillaria pusilla