100 THE CACTACEAE. 
We have followed Schumann and others who refer this species also to Oaxaca but the 
plants from that state may represent more than one species. In fact, the plant figured in 
Bliihende Kakteen we have described as new (see No. 50), while the one illustrated by Mr. 
H. H. Thompson is like others sent by Dr. Reko and Professor Conzatti, which we have 
referred here. 
Illustration: Thompson, U. S. Dept. Agr. Bur. Pl. Ind. Bull. 262: pl. 2, f. 2, as 
Mammillaria pyrrhocephala. 
Figure 100 is from a photograph of the plant sent to Washington by Dr. Reko from 
Oaxaca in 1919. 
45. Neomammillaria woburnensis (Scheer). 
Mammillaria woburnensis* Scheer, Lond. Journ. Bot. 4:136. 1845. 
Cactus woburnensis Kuntze, Rev. Gen. Pl. 1: 261. 1891. 
Mammillaria chapinensis Kichlam and Quehl, Monatsschr. Kakteenk. 19: 1. 1909. 
Fic. 98.—Neomammillaria woburnensis. Fic. 99.—Neomammiillaria chinocephala. 
Growing in clumps, giving off new plants from all parts of the body, globose to cylindric, dull 
green, milky; tubercles angled, setose and woolly in their axils; radial spines 5 to 9, yellowish or 
white; central spines 1 to 8, often long, reddish or yellow; flowers yellow, small, about 1 cm. long; 
fruit red, clavate, 18 to 25 mm. long; seeds minute, brown. 
Type locality: Guatemala. 
Distribution: Guatemala. 
. For a long time little was known about this plant, but a few years ago it was discovered 
in abundance by Wm. R. Maxon (1905) and by F. Eichlam (1908). It was given a new 
name, Mammillaria chapinensis, under which it is to be found in most collections. 
The plant was described by Frederick Scheer from a barren specimen in the Royal 
Botanical Garden at Kew, sent from Guatemala. It was named for Woburn Abbey, 
where there was once a very large collection of cacti under the care of James Forbes. 
[llustrations: Monatsschr. Kakteenk. 24: 87; Succulenta 4: 40; Modllers Deutsche 
Gart. Zeit. 25: 475. f. 8, No. 12, as Mammillaria chapinensis. 
Figure 98 is from a photograph of a plant sent to Washington by F. Eichlam in 1908. 
. LL - : 
This name was originally printed by Scheer as Mamillaria voburnensts. 
