Planted Lindheimeriance. 199 



rica ; tuberculis elongato-pyramidatis subquadrangulatis apice 

 ex tomento albo brevi mox evanido aculeiferis ; aculeis rectis, 

 9—10 tenuioribus insequalibus 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 areolae, 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. 



Mammillaria gummifera, Englm. in Wish Rep. not. 33, 

 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 subaequan- 

 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. 



Mammillaria Nuttallii, Englm. in PI. Fendl., from the 



