198 Planta Lindhcimeriana. 



fusca ; caule simplici,succo lacteo; jloribus ex axillis tuberculo- 

 rum anni prions. 1 



Mammillaria applanata (n. sp.) : simplex, depressa ; tu- 

 berculis elongato-pyramidatis subquadrangulatis apice ex 

 tomento albo lanoso demum evanescente aculeiferis ; aculeis 

 rectis 15-20 tenuioribus inequalibus radiantibus, singulo 

 centrali robustiori erecto ; axillis nudis ; floribus sordide albi- 

 dis s. rubellis ; ovario glabro, sepalis 8 - 13 lanceolatis ; petalis 

 12-18 lanceolatis mucronatis, internis versus apicem fimbri- 

 ato-denticulatis ; stigmatibus 5-8 stamina brevia pauca 

 flavida longe excedentibus flavis ; baccis elongato-clavatis ; 

 seminibus subgloboso-ovatis scrobiculatis rugulosis parvis. — 

 Rocky plains on the Pierdenales : flowers (in St. Louis) in 

 May. Flowers forming a circle or wreath, in the larger speci- 

 mens, of 1 — 1| inches diameter around the growth of tuber- 

 cles of the same year, while the scarlet fruit is frequently still 

 persistent and forms an outer circle. Plant 2| to 4| 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 2|-6 lines long, whitish; 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. 



Mammillaria hemispheric a (n. sp.) : simplex, hemispha?- 



i Tt has been stated over and over again, that all the Caclacecc paralleled (with 

 cotyledons parallel to the more or less compressed sides of the seed,) see Wlsl. 

 Rep. pp. 91 and 92) produce the flowers from the same year's growth, and the Cac- 

 tacce co?itrarice (cotyledons contrary to the compressed sides of the seeds) from that 

 of the last preceding or former years. In Wisl. Rep. 1. c. I have stated that some 

 Mammillariee probably formed an exception to that rule. What was a supposition 

 then 1 have since ascertained to be the fact. These few species, however, are the 

 only ones in which I have as yet observed this exception. 



