NEOMAMMILLARIA. 75 
‘SS 9. Neomammillaria heyderi (Miihlenpfordt). 
- Mammiullarta heyderi Mithlenpfordt, Allg. Gartenz. 16: 20. 1848. 
Cactus heydert Kuntze, Rev. Gen. Pl. 1: 260. 189r. 
? Mammillaria buchheimeana Quehl, Monatsschr. Kakteenk. 27: 97. 1917. 
Plant globose or somewhat flattened at apex; tubercles conic, 12 mm. long, when young bearing 
wool in their axils; young spine-areoles white-woolly; radial spines 20 to 22, white, setaceous, the 
lower ones stouter and longer; central spine solitary, brown at base and apex, 5 to 6 mm. long; 
flowers pinkish, the segments linear-oblong; fruit oblong, red. 
Type locality: Not ‘cited. 
Distribution: Texas and northern Mexico. 
Illustration: Schulz, Wild Fl. San Antonio pl. 13 in part, as M. heyderi. 
Plate vin, figure 2, shows a plant sent to Dr. Rose by Mrs. S. L. Pattison in 1921 which 
flowered in the New York Botanical Garden on April 21 of that year; figure 2a shows the 
fruit. 
Fic. 68.—Neomammillaria phymatothele. 
Fic. 67.—Neomammillaria macdougalii. 
>> 10. Neomammillaria hemisphaerica (Engelmann). 
_ Mammillaria hemisphaerica Engelmann in Wislizenus, Mem. Tour North. Mex. 105. 1848. 
Mammillaria heyderi hemisphaerica Engelmann, Proc. Amer. Acad. 3:2 3. 1856. 
Cactus heyderi hemisphaericus Coulter, Contr. U. S. Nat. Herb. 3:97. 1894. 
Cactus hemisphaericus Small, F1. Southeast. U.S. 811. 1903. 
Deep-seated in the soil, hemispheric, 8 to 12 cm. broad, dark green; tubercles only Slightly 
angled, not very closely set, 1 to 1.5 cm. long, somewhat pointed, their axils nearly nakec in t ie 
dormant stages; spine-areoles woolly when young, becoming glabrate in age; radial spines 9 o. 3» 
widely spreading acicular, the upper ones more delicate, 4 to 8 mm. long, brownish or smok y; ° € n 
with black tips; central spine solitary, porrect, brown; flowers small, cream-colored, I to 1.5 € m. ong 
inner perianth-segments acute; filaments pinkish; style pinkish; stigma-lobes 6 to 10, greenis 
yellow; fruit slender, clavate, red, 1 to 1.5 cm. long. 
Type locality: Below Matamoros on the Rio Grande. 
Distribution: eastern Texas and northeastern Mexico. 
Tie eee gone collected in 1846 by the St. Louis Volunteers in the Nesican ‘ a and 
taken back to Dr. George Engelmann; it flowered and he described it bri y in ; B48 an 
in more detail in 1850. It was recently re-collected near Brownsville, exas, Just across 
the river from Matamoros by Robert Runyon and sent to us with a photogra] 
in situ, here reproduced (plate v1, figure 2). 
