118 CACTEA OF PLANTA LINDHEIMERIANA. 
§ 2. FRUCTU COCCINEO ; COROLLA DECIDUA. 
* Fructu clavato meek seminum testa pergamentacea, fusca ; caule simplici, succo lacteo; floribus ex [198] 
is tuberculorum anni prioris.® 
M. APPLANATA, n. sp.: simplex, depressa ; tuberculis ae ap aE subquadrangulatis apice ex tomento 
albo lanoso demum evanescente aculeiferis ; aculeis rectis 15-20 tenuioribus inequalibus radiantibus, singulo 
centrali robustiori erecto ; axillis nudis ; floribu us sordide albidis 8, vaitelita ; ovario glabro, sepalis 8-13 lanceolatis; 
petalis 12-18 lanceolatis mucronatis, internis versus apicem fimbriato-denticulatis ; stigmatibus 5-8 stamina brevia 
pauca flavida longe excedentibus flavis; baccis elongato-clavatis; seminibus pabitolicncsciriitis scrobiculatis rugulosis 
vis. — Rocky plains on the Pierdenales; flowers (in St. Louis) in May. Flowers forming a circle or wreath, in 
the larger specimens, of 1-14 inches diameter, around the growth of tubercles of the same year, while the scarlet fruit 
is frequently still persistent, and forms an outer circle. -_ 24 to 44 inches in diameter, 1-2 inches high, with an 
almost level top and depressed vertex; in larger specimens 34, in smaller ones 13 or 21, spiral rows of tubercles are 
most conspicuous. Radiating spines 23-6 lines long, aay the 3 or 4 outer or lower are stouter and very light 
brown ; the central spines erect, or rather somewhat inclined upwards and inwards, 2-4 (mostly 3) lines long, light 
yellowish-brown. The innermost tubercles of the preceding year appear to produce the inconspicuous flowers, which 
are from 9 to 12 lines long, urceolate when not fully expanded in bright sunshine. Berry 8 to 15 lines long. 
HEMISPHARICA, n. sp.: simplex, hemisphzrica; tuberculis elongato-pyramidatis subquadrangu- [199] 
latis apiece ex tomento albo brevi mox cs aculeiferis ; aculeis rectis, 9-10 cs aha ineequalibus 
iantibus, singulo centrali robustiori porr axillis nudis ; floribus sordide albidis s. ubellis ; ; ovario glabro ; 
sepalis sub-13 lanceolatis acutis vel gS naa tp petalis sub-13 oblongo-lanceolatis os integris 8. versus 
apicem denticulatis ; stigmatibus 5-8 ex flavido rubellis supra stamina numerosa ru ertis; baccis elongato- 
elavatis ; seminibus elongato-ovatis rugulosis minutis. — Below Matamoras, on the Rio Granta. " Nrvnght 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 areole, and the much smaller, 
less rough, and lighter-colored seed. I can see no essential difference in the flower. Body of the plant 3-43 inches in 
diameter, 2-3 inches high ; flowers 10-15 lines long and about the same diameter when fully open in the forenoon sun, 
urceolate in the afternoon. Radial spines 2 or 3-4, the central spine 2-3 lines long 
M. gumMirera, Engelm. in Wisliz. Rep. note 33, has now flowered with me, and proved, as was expected, 
similar to the two foregoing species. I add here the description of the flower. — Floribus rubellis ; ovario glabro; 
sepalis sub-13 oblongo-inearibus obtusiusculis fimbriatis; petalis 16 eens breviter acuminatis eae 
erosis ; stigmatibus 6 stamina brevia rubella longe excedsidthets petala subzequantibus virescentibus. — Flow 
15 lines ious, 6-12 sa wide when fully open, town ish-red outside, the petals reddish-white, with dark nl 
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 
tuberculorum hornotinorum 
M. Norra, Engelm. in Plant. Fendl., from the Upper Missouri. The only specimen I possessed [200] 
was unfortunately iaenvet = Mamillaria inilhe Engelm. in Plant. Lindh. |. ¢., first discovered by 
Mr. Lindheimer near the Brazos, has since been found by him south of the Guadaloupe, about New Braunfels, and 
on the Pierdenales, in several “Sill It has frequently flowered with me, and annually produces abundant fruit. 
I substitute the following character and description. 
4 : subsimplex s, plerumque czespitosa ;_ tuberculis ovato-cylindraceis supra plus minus sulcatis (sulco 
in junioribus basin versus tomentoso sepe prolifero) axilla tomentosis ; areola albo-tomentosa demum nuda ; aculeis 
10-12 rectis albidis, radiantibus tenuioribus equalibus, centrali nullo s. singulo robustiori ; floribus ex axillis tubercu- 
lorum hocnitinaiien subcentralibus s. demum lateralibus (flavis s. ex rubello flavicantibus); sepalis petalisque lineari- 
lanceolatis acuminato-aristatis ; sepalis 15-25 ciliato-fimbriatis sepe plus minus recurvis ; petalis 20-30 integris 8. 
basi subciliatis ; stigmatibus 5-8 virescentibus supra stamina numerosissima exsertis ; bacca obovato- subglobosa 
coccinea ; seminibus nigris subglobosis scrobiculatis majoribus. 
* It has been stated over and over again that all the Cac- years. In Wisliz. Rep. 1. c., I have stated that some opaied 
tacee parallele (with cotyledons parallel to the more or less larie probably formed an eieeptial to that ru What 
compressed sides of the seed, see Wisliz. Rep. pp. 91 and 92) a supposition then I have since ascertained to be the fact. 
produce the flowers from the same year’s growth, and the These few species, however, are the only ones in which I have 
contrarie (cotyledons contrary to the compressed as yet observed this exception. 
sides of the seeds) from that of the last preceding or former 
