\ 
TOUMEYA. 9! 
The beautiful flowers close partially at night. 
Mammillaria spaethiana Schumann, listed by Spath (Cat. 1894-1895), seems never to 
have been described. Schumann afterwards withdrew the name and Mrs. Brandegee (Zoe 
5: 31. 1900) states that it has the seeds of Echinocactus simpsonii and she believes it to 
be one of the forms of this species. 
The species as here treated covers a wide range and is represented by several striking 
forms. ‘The one from the state of Washington has very dark, nearly black spines, the 
radials ascending and subulate. We have not seen this plant in flower but the flower-scar 
is at the spine-areole, as it always is in this genus. Mr. Charles V. Piper in his Flora of 
Washington says ‘‘quite certainly new.”’ It is possibly a good species. Here we would 
also refer a plant collected by J. E. Edwards near Haycreek, Oregon. It is possible, as 
Coulter believed, that these are the same as the Nevada form which represents Engelmann’s 
variety robustior and this view has been held by others. (See Cact. Journ. 2:1 57.) 
This Washington plant seems to have been collected more than 70 years ago, but the 
specimen has apparently been lost and the record overlooked. Our attention was called 
to this old record of Geyer, by Mr. C. V. Piper, here reproduced : 
Illustrations: Simpson’s Rep. pl. 1, 2; Britton and Brown, Illustr. Fl. 2: f. 2524; 
Knippel, Kakteen pl. 11; Forster, Handb. Cact. ed. 2. 593. f. 76; Schelle, Handb. Kakteenk. 
135; Gard. Chron. II. 6: 293. f. 60; III. 8: 166. f. 26, as Echinocactus simpson; 
Thomas, Zimmerkultur Kakteen 53; Gartenwelt 1: 85; Monatsschr. Kakteenk. 4: 167, as 
Mammillaria purpusii; Britton and Brown, Illustr. Fl. ed. 2. 2: f. 2983. — 
Plate vin, figure 1, was painted from a plant collected by A. N elson in Wyoming in 
1914 and sent by Dr. Rose to the New York Botanical Garden. Figure 1o1 is from a 
photograph of the same-plant. 
\ & 7) 6. TOUMEYA gen. nov. 
A small, ovoid or short-cylindric cactus, the areoles borne on low spirally arranged tubercles; 
. F . ar : h longer than the radial; 
spines thin, flat, white, shining, papery, flexible, the central ones muc 
flowers central, about as wide as long, white, borne at the spine-areoles on nascent tubercles; ovary 
bearing a few minute-scales, their axils naked; outer perl 
lanceolate, acuminate; perianth-tube short, bearing severa 
globose, smooth; seeds compressed, oblique, black. 
Type species: Mammillaria papyracantha Engelmann. 
Mexico. 
The generic name is in honor of Dean James 
lections of cacti have greatly aided our investigations. 
anth-segments ovate, acute, the inner 
1 papery lanceolate scales; fruit dry, 
A monotypic genus of New 
W. Toumey, whose studies and col- 
1. Toumeya papyracantha (Engelmann). 
illari tha Engelmann, PI. Fendl. 49. 1849. 
Serie Piboracanthus Engelmann, Trans. St. Louis Acad. 2: 198. 1863. 
Simple with fibrous roots, 5 to 1o cm. long; ‘‘ribs 8, oblique” put probably vey eee naked 
in livi i isti ; ll, circular, pubescent when young, nake 
in living plants, bearing low distinct tubercles; areoles small, , 
in age, the lower ones described as proliferous, spines chartaceous, the radials 8 to ne unequal, 3 
to 20 mm. long, spreading; central spines 1 to 4, 3 to 4.cm. long, the upper ones co 
