BARTSCHELLA. 57 



small, rotate, nearly 2 cm. broad ; perianth-segments pinkish with pale margins, linear-oblong, acute, 

 the outer ones ciliate ; filaments reddish ; upper part of style and stigma-lobes green. 



Collected by J. N. Rose and Wm. R. Fitch on hills of Devil's River, Texas (No. 17991). 

 Plate VII, figure 4, shows the type, which flowered in the New York Botanical Garden, 

 March 31, 1914; figure 4a shows a tubercle with its gland-bearing groove. 



8. Escobaria lloydii sp. nov. 



Plant growing in clumps and resembling a small species of Echinocereus ; old plants bearing naked 

 corky tubercles; radial spines about 20, spreading, slender, white; central spines several, stout, with 

 black or with brownish tips, 2 cm. long; flowers greenish with a central stripe on outside, 2.5 cm. long; 

 filaments, style, and stigma-lobes green; fruit red, globose to short-oblong, 6 to 12 mm. long; seeds 

 black, pitted, globose, i mm. in diameter. 



Collected by F. E- Lloyd in foothills of Sierra Zuluaga, Zacatecas, Mexico, March 29, 

 1908 (No. 5). 



This species is near Escobaria tuberculosa, but it has much stouter central spines and 

 greenish white, eciliate inner perianth-segments. 



SPECIES PERHAPS OF THIS RELATIONSHIP. 



Mammillaria emskoetteriana Quehl, Monatsschr. Kakteenk. 20: 139. 19 10. 



Cespitose, globose to short-cylindric, 5 cm. high; tubercles conic, their axils naked; radial spines 

 20 to 25; central spines 6 to 8, setaceous, white with black tips; flowers brownish yellow, 3 cm. long. 



Type locality: Not cited. 



We obtained a specimen of this plant from Ouehl in 19 13, but it has not done well nor 

 has it flowered and we have not been able to refer it to any described species, but believe 

 that it may be near Escobaria tuberculosa. Mr. Ouehl believed that it was near Mant- 

 millaria dasyacantha, but if it came from San Luis Potosi, as Mr. Ouehl supposed, it is doubt- 

 less specifically distinct from both. The following note is a translation of some remarks by 

 Mr. Quehl: 



"Our illustration shows a grafted specimen which has naturally grown more corpulent and 

 consequently permits one to see better its general structure and the arrangement of the spines. 

 Ungrafted specimens are thicker, lower, and, without other characteristics, can not be distinguished 

 from a red-spined Mammillaria pusilla var. mulliceps. Only a closer inspection reveals the wart- 

 furrows and consequently the Coryphantha. The similarity is so great that I suspect that the new 

 species is already more disseminated though not correctly recognized and the plants are either set 

 aside or ignored as a form of Mammillaria pusilla. The plants before me were raised by Mr. Robert 

 Emskotter, fancy and commercial gardener, of Magdeburg, after whom I have named the species, 

 from mixed seed which he received from San Luis Potosi, so that Mexico may be regarded as its 

 home." 



Illustration: Monatsschr. Kakteenk. 20: 139. 



9. BARTSCHELLA gen. nov. 



Usually cespitose, globose to short-oblong cactus; tubercles large, somewhat united with the 

 adjacent ones as in certain species of Echinocactanae, terete, not grooved, juicy, not milky; spines 

 both radial and central, the latter usually hooked; flowers borne near top of plant, large, light purple 

 or lavender; fruit short, hidden among the tubercles, seemingly dry, circumscissile ; seeds dull black, 

 pitted, with a narrow cylindric base, slightly constricted above; hilum large, slightly depressed, 

 triangular. 



Type species: Mammillaria schumannii Hildmann. 



While this genus is probably to be referred to the Coryphanthqnae, it possesses some 

 characters of certain species of Echinocactanae, but the origin of the flower is quite difi"erent 

 from any of them. The flower is large, like that of some species of Coryphantha, but the 

 tubercles are not grooved and the seeds are not brown and reticulated. It differs from the 



