900 Plante Lindheimeriana. 
Upper Missouri ; the only specimen I possessed was unfortu- 
nately destroyed. — Mammillaria similis, Engelm. in Plant. 
Lindh. l. c., first discovered by Mr. Lindheimer near the Bra- 
zos, has since been found by him south of the Guadaloupe, 
about New Braunfels and on the Pierdenales in several forms. 
It has frequently flowered with me and annually produces 
abundant fruit. I substitute the following character and 
M. smits: subsimplex s. plerumque cæspitosa ; tuberculis 
ovato-cylindraceis supra plus minus sulcatis (sulco in juniori- 
bus basin versus tomentoso sspe prolifero) axilla tomentosis ; 
areola albo-tomentosa demum nuda; aculeis 10 — 12 rectis 
albidis, radiantibus tenuioribus eequalibus, centrali nullo s. 
singulo robustiori; floribus ex axillis tuberculorum hornoti- 
norum ianiai s. demum lateralibus (flavis s. ex rubello 
flavicantibus) ; sepalis petalisque lineari-lanceolatis acuminato- 
aristatis; sepalis 15—25 ciliato-fimbriatis sæpe plus minus 
recurvis; petalis 20—30 integris s. basi subciliatis ; stigmati- 
bus 5 —8 virescentibus supra stamina numerosissima exsertis ; 
bacca obovato-subglobosa coccinea ; seminibus nigris subglo- 
bosis scrobiculatis majoribus. 
œ. CESPITOSA: gracilior; aculeis radiantibus sub-12, centrali 
subnullo; sepalis 15 — 90 ; stigmatibus sub-5. 
8. noBUsTIOR: subsimplex; aculeis radiantibus sub-10, cen- 
trali robustiori; sepalis 20—25 ; petalis 25-30; stigmatibus 
7-8. Flowers (at St. Louis) in May. — Stems 11— 21 inches 
high, obovate, of smaller diameter; tubercles in «. 8, in 
often in 13 rows; spines 3—4, in 8. 4—8 lines long; central 
spine, when present, 6 lines long. Grooves proliferous towards 
the upper or the lower end. Flowers 11—2 inches long, and 
of the same diameter when fully open, radiating like stars 
with their pale yellow, silky lustre, giving this species a most 
beautiful appearance when several open on the same morn- 
ing: petals 12— 15 lines long and —— Berries 3-5 
lines in diameter. 
