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Tan. 4358. 
MAMILLARIA Crava. 
Club-shaped Mamillaria. 
Nat. Ord. Cactra.—Icosanpr1a Monoeynia. 
Gen. Char. Calycis tubus ovario adherens ; Jodi 5-6 colorati fructum juniorem 
coronantes. Petala 5-25 a calyce vix distincta, eo longiora et cum sepalis in 
tubum conereta. Stamina filiformia, pluriserialia. Stylus filiformis. Stigma 
3-7-radiatum. Bacca levis oblonga. Semina nidulantia. Cotyledones minute, 
acuminatee.—Suffrutices carnosi subrotundi, aut cylindracei, lactescentes, aut succo 
limpido repleti, aphylli, tuberculis subconicis mammeaformibus spiraliter dispositis, 
apice spinulas radiantes et tomentum deciduum gerentibus obtecti. Flores inter 
asin mamillarum sessiles, sepius in zonam transversam dispositi. Bacca obovata, 
edulis, calyce marcescente, demum deciduo, coronata. Pfeiff. 
Mamiiaria Clava; simplex erecta clavato-columnaris glauco-viridis, axillis 
tomentosis, mamillis undique insertis maximis elongatis angulato-pyrami- 
datis erecto-patentibus, areolis terminalibus tomentosis, aculeis rectis elongatis 
corneis radiantibus 8-11-12, centrali 1 longiore robustiore, floribus termi- 
nalibus 2-3 majusculis, petalis stramineis apicibus serratis apiculatis exte- 
rioribus rubescentibus. 
MAMILLARIA Clava. “Pfeiff. in Otto et Dietr. Allgem. Gartenzing. v.8. p. 282.” 
Walp. Repert, Bot. v.2. p. 259. 
A very striking species of Mamillaria, remarkable for its 
columnar rather than clavate form, its very prominent mamilla 
and large, glossy, straw-coloured flowers. It was received at the 
Royal Gardens of Kew under the name here retained, though it 
does not entirely correspond with the brief character of the plant 
given by Walpers, of which, moreover, the flowers seem to be 
unknown to the author. Still I preserve the name; or upon 
similar grounds, almost every species of the genus might be 
discarded ; so difficult is it in words to define the characters of 
these strange and curious plants. It flowers in June. 
Descr. Our specimen of this plant is a foot high, columnar, 
simple, of a glaucous green colour, studded as it were on all 
sides with large, projecting, and ascending mamille, of a pyra- 
midal form, with bluntly angled sides, densely downy with 
white wool in the axils: the areo/e terminal or subterminal, 
woolly, and bearing besides from eight to eleven straight, 
_ MARCH, Ist, 1848. 
