Mammillaria heyderi

Muehlenpfordt

Allg. Gartenzeitung 16: 20. 1848.

Common names: Little nipple cactus
Illustrated
Treatment appears in FNA Volume 4. Treatment on page 255. Mentioned on page 249, 256.

Plants unbranched, protruding relatively little above soil. Roots obconic taproots; secondary-roots diffuse. Stems top-shaped, flat-topped (aerial part sometimes hemispheric in old age or in dense subtropical vegetation), protruding above ground 0–2 × (4–) 7.5–15 cm, firm; tubercles 9–15 (–20) × 3–7 mm; axils with short wool, bristles absent; cortex and pith not mucilaginous; latex abundant in healthy tissue throughout cortex of stem, tubercles, and sometimes flower receptacle, sticky, white. Spines (8–) 10–18 (–27) per areole, usually brownish, darker at tip, glabrous; radial spines (8–) 10–22 (–26) per areole, white to white-and-brown or brown, needlelike, 6–15 (–16) mm, stiff, abaxial spines longest; central spines (0–) 1 (–4) per areole, porrect or ascending, not hooked, (0.5–) 2–8 × 0.15–0.45 mm; subcentral spines 0. Flowers 1.9–3.8 × 1.5–3 cm; outermost tepal margins entire; inner tepals white, greenish or cream to pale-pink, with tan, pink, greenish, or brownish midstripes, 11–19 × 2–2.5 mm; stigma lobes externally green, internally green or red (or pink), 2.5–3 mm. Fruits brilliant red: scarlet, carmine, or crimson, obovoid to clavate, 10–35 (–40) × 5–8 mm, juicy only in fruit walls; floral remnant weakly persistent. Seeds reddish-brown, sometimes yellowish when fresh, 1–1.2 mm, deeply pitted; testa thin, relatively flexible; anticlinal cell-walls sinuate, interstices narrower than pit diameters; pits cavernous or deeply concave. 2n = 22.

Distribution

V4 468-distribution-map.gif

Ariz., N.Mex., Okla., Tex., n Mexico

Discussion

Varieties 2 (2 in the flora).

Green fruits of Mammillaria heyderi with fully mature, viable seeds precede the ripe (elongate) fruits by six months to a year.

Selected References

None.

Key

1 Central spines 0.15-0.35 mm diam.; radial spines (7-)13-17(-26) per areole, abaxial radial spines 6-11(-16) mm; e of El Paso, Texas, New Mexico, Oklahoma. Mammillaria heyderi var. heyderi
1 Central spines 0.35-0.45 mm diam.; radial spines 10-14 per areole, abaxial radial spines 9-15 mm; El Paso, Texas, w to Arizona Mammillaria heyderi var. bullingtoniana
... more about "Mammillaria heyderi"
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 +
Muehlenpfordt +
hardened +
triangular +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
curved +  and straight +
2mm +  and 8mm +
ascending +  and porrect +
0.015 cm0.15 mm <br />1.5e-4 m <br /> (0.045 cm0.45 mm <br />4.5e-4 m <br />) +
proliferating +
flattened +  and cylindric +
Little nipple cactus +
not mucilaginous +
Ariz. +, N.Mex. +, Okla. +, Tex. +  and n Mexico +
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 +
1.9 cm19 mm <br />0.019 m <br /> (3.8 cm38 mm <br />0.038 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 />) +
1.5cm;3cm +
3.5 cm35 mm <br />0.035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
red;crimson;carmine;crimson;carmine;scarlet;red +
indehiscent +
persistent +, long +  and deciduous +
10mm;35mm +
obovoid +  and clavate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
4 cm40 mm <br />0.04 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
7.5 cm75 mm <br />0.075 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
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 +
brownish +, greenish +, pink +  and tan +
deciduous +  and persistent +
concave +  and cavernous +
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 />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
obovoid;pyriform;obovoid;pyriform;lenticular-reniform;comma--shaped;spheric +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Illustrated +
1.5 cm15 mm <br />0.015 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
white +  and white-and-brown or brown +
straight +  and curved +
deciduous +  and persistent +
10 (?) +  and 22 (?) +
annulate-ridged +, hairlike +, daggerlike +, subulate +  and acicular +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
hard +  and rigid +
decurrent +
unsegmented +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
purplish +, green +  and gray-green +
1cm;15cm +
protruding +
flat-topped +  and top--shaped +
1.8cm;12cm +
red +  and green +
tuberculate +
Chilita +, Cochemiea +, Dolichothele +, Ebnerella +, Leptocladodia +, Neomammillaria +  and Phellosperma +
adventitious +
epipetric +  and epiphytic +
Mammillaria heyderi +
Mammillaria +
species +
fringed +  and entire +
flat +  and concave +
dull +  and glossy +
not confluent +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
9mm +  and 15mm +
cylindric +, conic +  and pyramidal +
3mm +  and 7mm +
straight +
sinuate +
epiphytic;epiphytic;epiphytic +
barrel-shaped +  and spheric +