Neolloydia conoidea var. conoidea

Common names: Texas cone cactus
Treatment appears in FNA Volume 4. Treatment on page 238.

Stems: tubercles ascending but not overlapping sufficiently to called imbricate; axils copiously woolly at stem apex during flowering; hairs pure white, to 6 mm. Spines: radial spines appressed, whitish, often with dark tips (rarely all white or all brown), translucent or opaque, 0.3 mm diam. beyond bulbous basal portion; central spines black or dark-brown, 6–25 (–30) × 0.5–1 mm diam.; abaxial longest central spine porrect or angled slightly toward base of plant, 17–24 mm; adaxial 1–3 central spines angled toward apex of plant, 9–17 mm. Flowers: outer tepals whitish with greenish midvein; inner tepals bright-rose-pink, almost magenta, without darker midstripes; anthers 1 mm; style 7–11 × 1 mm. Fruits persistent, pale yellowish olive, proximal part hidden by hairs, off white with very slight pink tint. Seeds black, pyriform, 1.4–1.6 mm. 2n = 22.


Phenology: Flowering Apr–Jul; fruiting Nov.
Habitat: Chihuahuan desert scrub, edge of Tamaulipan thorn scrub, stony grasslands, usually on limestone
Elevation: [500-]800-1400[-2300] m

Distribution

V4 434-distribution-map.gif

Tex., Mexico (Coahuila), Mexico (Durango), Mexico (Nuevo León), Mexico (San Luis Potosí), Mexico (Tamaulipas), Mexico (Zacatecas)

Discussion

Neolloydia conoidea has the grooved tubercles and general appearance of many species of Coryphantha, but has flowers, fruits, and seeds most like those of Ariocarpus.

Neolloydia gautii L. D. Benson, known only from the type specimen, was alleged to be from Texas (L. D. Benson 1982). The controversial specimen, a greenhouse-grown plant with a J. N. Rose garden number, represents the common Mexican species Turbinicarpus beguinii (N. P. Taylor) Mosco & Zanovello (in the broad sense).

Selected References

None.

Lower Taxa

None.

"elongated" is not a number.

1.7 cm17 mm <br />0.017 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
cushionlike +
circular to linear +
deciduous +  and persistent +
hourglass--shaped +
Allan D. Zimmerman +  and Bruce D. Parfitt +
(de Candolle) Britton & Rose +
hardened +
Mammillaria conoidea +
triangular +
dark-brown +  and black +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
proliferating +
flattened +  and cylindric +
Texas cone cactus +
not mucilaginous +
Tex. +, Mexico (Coahuila) +, Mexico (Durango) +, Mexico (Nuevo León) +, Mexico (San Luis Potosí) +, Mexico (Tamaulipas) +  and Mexico (Zacatecas) +
[500-]800-1400[-2300] m +
not separating +
2.5 cm25 mm <br />0.025 m <br /> (3.2 cm32 mm <br />0.032 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 />) +
3cm;5.5cm +
olive;pale yellowish +
indehiscent +  and dehiscent +
persistent +
4mm;10mm +
spheric +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
conspicuous +
Chihuahuan desert scrub, edge of Tamaulipan thorn scrub, stony grasslands, usually on limestone +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3.2 cm32 mm <br />0.032 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 +
0 cm0 mm <br />0 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
deciduous +  and persistent +
Flowering Apr–Jul +  and fruiting Nov. +
not mucilaginous +
specialized +
ridgelike +  and nipple--shaped +
Bull. Torrey Bot. Club +
3;2;2;30 +
tuberculate +
triangular +
arillate +  and strophiolate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
papillate +
pyriform +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Illustrated +
opaque +, translucent +  and whitish +
straight +
deciduous +  and persistent +
9 (?) +  and 15 (?) +
acicular +
0.6 cm6 mm <br />0.006 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
hard +  and rigid +
decurrent +
unsegmented +
6.5 cm65 mm <br />0.065 m <br /> (8 cm80 mm <br />0.08 m <br />) +
white +, gray-green +  and yellowish or bronze-tinted green +
5cm;10cm +
spheric +  and short cylindric +
succulent +
2.5cm;6.5cm +
white +  and cream +
7mm;11mm +
tuberculate +
adventitious +
tuberlike +
epipetric +  and epiphytic +
Neolloydia conoidea var. conoidea +
Neolloydia conoidea +
variety +
dull +  and glossy +
imbricate +  and overlapping +
8mm +  and 18mm +
conic +  and compressed +
unbranched +  and branched +
epiphytic;epiphytic;epiphytic +
not deep-seated +
barrel-shaped +  and spheric +