Plante Lindhewmeriane. 199 
rica; tuberculis elongato-pyramidatis subquadrangulatis apice 
ex tomento albo brevi mox evanido aculeiferis ; aculeis rectis, 
9-10 tenuioribus inzequalibus radiantibus, singulo centrali 
robustiori porrecto ; axillis nudis; floribus sordide albidis s. 
rubellis ; ovario glabro; sepalis sub-13 lanceolatis acutis vel 
obtusiusculis ;_ petalis sub-13 oblongo-lanceolatis mucronatis 
integris s. versus apicem denticulatis ; stigmatibus 5—8 ex 
flavido rubellis supra stamina numerosa rubella exsertis ; bac- 
cis elongato-clavatis ; seminibus elongato-ovatis rugulosis mi- 
nutis. — Below Matamoras, on the Rio Grande ; brought home 
by the St. Louis Volunteers, in 1846 : flowers (in St. Louis) in 
May. Very similar to the last species, but well distinguished 
by the hemispherical shape, the much smaller number of shorter 
spines, the less woolly areolz, and the much smaller, less rough, 
and lighter-colored seed. I can see no essential difference 
in the flower. Body of the plant 3—4! inches in diameter, 
2-3 inches high: flowers 10-15 lines long and about the 
same diameter when fully open in the forenoon sun, urceo- 
late in the afternoon. Radial spines 2, or 3—4; the central 
spine 2-3 lines long. 
Mammitiaria GumMireRa, Englm. in Wisl. Rep. not. 38, 
has now flowered with me, and proved, as was expected, sim- 
ilar to the two foregoing species. I add here the description 
of the flower.—Floribus rubellis; ovario glabro; sepalis 
sub-13 oblongo-linearibus obtusiusculis fimbriatis; petalis 16 
lanceolatis breviter acuminatis denticulato-erosis ; stigmatibus 
6 stamina brevia rubella longe excedentibus petala subeequan- 
tibus virescentibus. — Flower 15 lines long, 6-12 lines wide 
when fully open, brownish red outside; the petals reddish 
white, with dark red in the middle. Flower larger than that 
of M. applanata, much darker and more elegantly colored ; 
style longer, etc. Fruit not seen. 
** Fructu subgloboso; seminum testa dura nigra; caule 
prolifero (an semper?) succo aqueo; floribus ex axillis tuber- 
culorum hornotinorum. 
Mamminiarta Nourrauyu, Englm. in Pl. Fendl., from the 
