142 THE CACTACEAE. 
lower one sometimes strongly hooked; flowers from axils of old tubercles, near top of plant; 1.5 cm. 
long, deep purple; inner perianth-segments narrowly oblong, apiculate; filaments and style purplish; 
stigma-lobes greenish; fruit clavate, red, 12 
mm. long; seeds minute, brown. 
BES 
This species has been sent to us re- 
peatedly from Oaxaca, Mexico, by Dr. 
B. P. Reko and it has been named in his 
honor; we have selected as the type his 
specimen of 1921, which flowered in 
Washington. 
This is a remarkable species, being 
the only one we know, except the follow- 
ing, which has the characters of watery 
tubercles, a hooked spine, and brown 
seeds, but some plants give out a very 
diluted milk and have no hooked spines. 
Dr. Reko sent us a single plant in 
April 1922, which was about 12 cm. long 
and short-clavate; the central spines 
were mostly 4, but. sometimes 5, and 
none of them hooked: In this specimen 
we obtained a diluted milky juice from 
the upper tubercles while the lower ones 
are entirely devoid of milk. It flowered 
in April 1923 and seemed to be referable 
here. . 
Figure 149 shows a plant sent by Dr. B. P. Reko from Oaxaca, Mexico, in 1919; figure 
155a shows the plant collected by Dr. Reko in 1922, referred to above. 
Fic..155a.—Neomammillaria rekoi. 
108. Neomammillaria solisii sp. nov. 
Simple, globular or nearly so, 5 to 7 cm. in diameter, green or becoming purplish; tubercles 8 
mim. long, terete in section, a little narrow towards the tip and thus separated above from the ad- 
joining tubercles, their axils without wool even when quite young, and usually with 1 to many 
bristles; radial spines about 10 to 20, spreading, 6 to 7 mm. long, white, bristle-like; central spines 
3 or 4a ate stouter than the radials, becoming brown, one of them strongly hooked (sometimes 
2 cm. long). 
Collected by Octavio Solis in Cerro de Buenavista de Cuellar, Guerrero, Mexico, in 
1920 (No. 5) and in 1921, type, and at the same station by Professor C. Nifiez in April 
and November 1921 (Nos. 4 and 6). 
Figure 156is froma photograph of a plant sent by Octavio Solis from Guerrero, Mexico, 
in 1920; figure 157 isfroma photograph of a plant sent by Professor C. Nijiez in 1922. 
109. Neomammillaria pygmaea Sp. nov. 
_ Plant very small, globose to cylindric, 2 to 3 em. in diameter; tubercles small, obtuse; radial 
spines about 15, white, stiff, hardly puberulent even under a lens; central spines 4, ascending, 
golden yellow, the lower one hooked, 5 to 6 mm. long; flowers about 1 cm. long, the outer segments 
tinged with red, apiculate ; inner perianth-segments about 10, cream-colored; filaments greenish, 
much shorter than the perianth-segments; style greenish. ‘os 
Collected by J. N. Rose near Cadereyta, Querétaro, Mexico, in 1905 (No. 9863). 
It has repeatedly flowered but was only 3 cm. high in 1921 when it died. 
