Mammillaria sphaerica

A. Dietrich

Allg. Gartenzeitung. 21: 94. 1853.

Common names: Longmamma nipple cactus
Synonyms: Dolichothele sphaerica (A. Dietrich) Britton & Rose Mammillaria longimamma var. sphaerica (A. Dietrich) K. Brandegee
Treatment appears in FNA Volume 4. Treatment on page 250. Mentioned on page 249.

Plants many branched; branches 10–30 (–50). Roots thick taproots, large in upper portion. Stems subspheric, 4–5 × 5–8 cm, soft, flaccid; tubercles 12–25 × 5–8 mm; axils slightly short woolly, without bristles; cortex and pith not mucilaginous; latex absent. Spines 13–15 per areole, whitish to yellowish, glabrous; radial spines 12–14 per areole, gray, bristlelike, 6–9 × 0.1 mm, stiff; central spines 1 per areole, porrect, straight, not hooked or curved, similar to radial spines, 3–6 × 0.25 mm; subcentral spines 0. Flowers 4 × 5–7 cm; outermost tepal margins entire (or minutely toothed near base); inner tepals bright-yellow, paler near base, 20–30 × 4.5–8.5 mm; stigma lobes cream to pale-yellow, 5–6 mm. Fruits greenish white to dull pinkish tan or maroon, ovoid to short cylindric, 10–15 (–20) × 7 mm, juicy throughout; floral remnant weakly persistent. Seeds brown, 1.3 × 0.9 mm, pitted; testa soft or leathery, not hard or brittle; anticlinal cell-walls straight to slightly curved; interstices equal or narrower than pit diameters; pits bowl-shaped. 2n = 22.


Phenology: Flowering Jul; fruiting May.
Habitat: Tamaulipan thorn scrub on plains and low gravelly hills
Elevation: 0-300 m

Distribution

V4 454-distribution-map.gif

Tex., Mexico (Nuevo León), Mexico (Tamaulipas)

Discussion

A proposed taxonomic reduction of Mammillaria sphaerica to varietal rank within the geographically disjunct and morphologically distinct Mexican species, M. longimamma, while plausible, has not yet been convincingly justified.

Selected References

None.

Lower Taxa

None.
... more about "Mammillaria sphaerica"
cushionlike +
needlelike +  and bristlelike +
circular to linear +
2.5 cm25 mm <br />0.025 m <br /> (3.1 cm31 mm <br />0.031 m <br />) +
deciduous +  and persistent +
0.2 cm2 mm <br />0.002 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
plumose +  and hairlike +
0.001 cm0.01 mm <br />1.0e-5 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Allan D. Zimmerman +  and Bruce D. Parfitt +
A. Dietrich +
hardened +
triangular +
10 +  and 30 +
curved +  and straight +
3mm +  and 6mm +
0.25 cm2.5 mm <br />0.0025 m <br /> (?) +
proliferating +
flattened +  and cylindric +
Longmamma nipple cactus +
not mucilaginous +
Tex. +, Mexico (Nuevo León) +  and Mexico (Tamaulipas) +
0-300 m +
not separating +
4 cm40 mm <br />0.04 m <br /> (5.2 cm52 mm <br />0.052 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
unconnected +
4 cm40 mm <br />0.04 m <br /> (?) +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
greenish white;dull pinkish tan or maroon +
indehiscent +
persistent +, long +  and deciduous +
10mm;15mm +
ovoid +  and short cylindric +
7 cm70 mm <br />0.07 m <br /> (?) +
Tamaulipan thorn scrub on plains and low gravelly hills +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
4.5mm;8.5mm +
deciduous +  and persistent +
rudimentary +
flat +  and terete +
nearly +  and microscopic +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
tuberculate +
fluted;spheric;depressed-spheric or club-shaped +
deciduous +  and persistent +
Flowering Jul +  and fruiting May. +
bowl--shaped +
not mucilaginous +
ridgelike +  and nipple--shaped +
Allg. Gartenzeitung. +
bristly +  and woolly +
3;2;2;30 +
triangular +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (?) +
obovoid;pyriform;obovoid;pyriform;lenticular-reniform;comma--shaped;spheric +
0.9 cm9 mm <br />0.009 m <br /> (?) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
gray +, whitish +  and yellowish +
straight +  and curved +
deciduous +  and persistent +
6mm +  and 9mm +
12 (?) +  and 14 (?) +
annulate-ridged +, hairlike +, daggerlike +, subulate +  and acicular +
0.3 cm3 mm <br />0.003 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
hard +  and rigid +
0.1 cm1 mm <br />0.001 m <br /> (?) +
decurrent +
unsegmented +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
purplish +, green +  and gray-green +
4cm;5cm +
subspheric +
5cm;8cm +
cream +  and pale-yellow +
tuberculate +
Dolichothele sphaerica +  and Mammillaria longimamma var. sphaerica +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Mammillaria sphaerica +
Mammillaria +
species +
fringed +  and entire +
flat +  and concave +
dull +  and glossy +
not hard +, leathery +  and soft +
not confluent +
12mm +  and 25mm +
cylindric +, conic +  and pyramidal +
5mm +  and 8mm +
straight +
sinuate +
epiphytic;epiphytic;epiphytic +
barrel-shaped +  and spheric +