DOLICHOTHELE. 61 
a, 
f é i] 12. DOLICHOTHELE (Schumann) gen. nov. 
Plant-body globose, more or less cespitose, soft in texture, never milky; tubercles elongated, not 
grooved above; flowers borne in axils of old tubercles, very large, with a definite funnel-shaped tube; 
inner perianth-segments yellow, spatulate, tapering into a claw and borne on top of tube; stamens 
forming a spiral about style and borne on whole face of throat, but forming a definite ring at top of 
throat; style slender; stigma-lobes linear; ovary exserted, naked; fruit smooth, greenish, purplish, or 
red, globose, ellipsoid or short-oblong; seeds black or brownish. 
¥ 
Type species: Mammillaria longimamma De Candolle. 
The generic name is from doArxés long, and 6y\7 nipple, referring to the elongated 
tubercles. 
The fruit is not often collected and is not well known. Dr. Rose obtained a single 
fruit of one of the species, the only one we had then seen, in a private collection in Rome in 
1915; this is nearly globular, red, thin-walled, many-seeded; the seeds are brownish, pitted, 
slightly flattened, pointed at base, with a small sub-basal hilum. In October 1921, Robert 
Runyon sent us a number of fruits which were greenish white to purplish, with black seeds, 
these somewhat flattened and pitted. 
Fic. 59.—Dolichothele longimamma. 
Fic. 58.—Phellosperma tetrancistra. 
nwelt 10: 14. 1905) is usually considered as a 
M lari totricha Dams (Garte ) 
lative of this erour from it in the flowers as well as in other ways, 
close relative of this group, but it differs widely 
. . . . . . 6). 
and we believe that it is not congeneric with it (see page 12 
Three species, natives of southern Texas and northern and central Mexico, are 
recognized. 
KEy TO SPECIES. 
Spines glabrous, even when very young; species of Texas and northern Mexico 
Spines puberulent; species of central Mexico. 
Tubercles very long (sometimes 5 cm. long), 2 
central spines usually present.....--s++0srrcrttt ey cee 
Tubercles much shorter, bright green; radial spines 4 or 5; ¢ 
7 1. Dolichothele sphaerica (Dietrich). 1853 
7 Mammillaria sphaerica Dietrich in Poselger, Allg. Gartenz. 21: 94. 53- 
C ‘cus Kuntze, Rev. Gen. Pl. 1: 261. 1891. . . 1900. 
Mantmillaria longimamma sphaerica K. Brandegee, Cycl. Amer. Hort. Bailey 2:.975. 19 
1. D. sphaerica 
ee 
pale green, glaucous, radials 6 or more; 
2. D. longimamma 
3. D. uberiformis 
