198 Plante Lindheimeriane. 
fusca; caule simplici, succo lacteo; floribus ex axillis tuberculo- 
rum anni prioris.! 
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—1iinches 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 21 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 HEMISPHERICA (n. sp.) : simplex, hemisphe- 
1 It has been stated over and over agen that all the Cactacee ence (with 
— parallel to the more or less ressed sides of the seed,) see Fisl. 
Rep. pp. 9 Snr PE poses the flowers. na the same yea ar’s ‘growth; and di im 
contrari f the seeds) from that 
tace 
of the last indo former years. In Wisi. Rep. l. c. I have stated that some 
"Mammillarize probably formed an deeem tothat rule. What was a supposition 
then L have since ascertained to be the fact. These few species, however, are the 
only ones in which I have as yet observed this exception. 
