lOO 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), wliile 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. PI. Ind. Bull. 262: pi. 2, f. 2, as 

 Mammillaria pyrrhocephala. 



Figure 100 is from a photograph of the plant sent to Washington by Dr. Reko from 

 Oaxaca in 19 19. 



45. Neomammillaria wobumensis (Scheer). 



Mammillaria woburneitsis* Scheer, Lond. Journ. Bot. 4: 136. 1845. 



Cactus wobumensis Kuntze. Rev. Gen. PI. i: 261. 1891. 



Mammillaria chapinensis Eichlam and Quehl, Monatsschr. Kakteenk. 19: i. 1909. 



Fig. 98. — Neomammillaria wobumensis. 



Fig. 99. — Neomammillaria 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 i to 8, often long, reddish or 3'ellow; flowers yellow, small, about i 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 Wobum Abbey, 

 where there was once a very large collection of cacti under the care of James Forbes. 



Illustrations: Monatsschr. Kakteenk. 24: 87; Succulenta 4: 40; Mollers 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. 



* This name was originally printed by Scheer as Mamillaria voburnensis. 



