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Gymnocalycium marquezii (G. pflanzi)
It has fairly heavy spines bent backward in a
distinctive fashion.
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Description: Solitary or
slowly clustering, with peculiar spine clusters characteristically bent
backward in a distinctive fashion.
Stem: Flattened-globose,10-15 (25)cm in diameter, 10 cm tall,
pale green, to olive green that can
tinge of orangish purple in full sun. The epidermis has a velvety
appearance. The apex is slightly depressed and woolly.
Ribs: 10 to 12 thick, large, divided into polygonal rounded
(not chinned)
tubercles, separated by arched furrows.
Roots: Fibrous
Areoles: Large long, oval 10x14 mm, with cream-yellowish wool,
then blackish dismantling with time.
Spines: Strong, very stiff, bent backward, initially blackish
with a brown base then becoming grey-pinkish to whitish brown with black
point.
Radial spines: (5-)7-9 up to 25 mm long
Central spines: One (or two) of the same length.
Flowers:
Infundibuliform near the apex, diameter and height 45-50mm.
Pericarpell dull green very short. External
tepals spatulate, slightly bent outward , white with brownish green
midrib. Inner tepals intern narrower, spatulate and slightly
denticulate, white with carmine/pink purplish throat. Style carmine with
carmine pink 10-12 lobes. Pollen yellow.
Fruit: Globose of approximately 2 cm of diameter, becoming red
carmine with maturity. Pulp intense cherry-red.
Seeds: Microsemineum type, section pirisemineum, very small (0.6
X 0.4mm),
testa reddish shining and smooth.
NOTE: G. marquezii is very
similar in
structure to G. pfanzii var. riograndense but has shark
mat type skin, dark coppery red stem and dark spines. |
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Family:
Cactaceae (Cactus
Family)
Gymnocalycium marquezii Cárdenas
in:
Die Gattung Gymnocalycium in Bolivien.- Kakt. Sukk. 9(2): 26-27, ills.
1958
Type: Cárdenas 5066 – Bolivia: Tarija, Entre Rios, “near Angosto de
Villa Montes” [protologue, translated] / “Angosto de Villa Montes, 600
m” [holotype], 600 m, 3.1952 (type herbaria: LIL). LIL 531592 (holotype):
rad, corp, ar, sp, fl, ic.
Accepted
Scientific name: Gymnocalycium pflanzii (Vaupel)
Werdermann 1935
Origin:
Garden origin (Nursery
produced cultivar)
Etymology: Named in the honour of
Dr. J. L.
Marquez
Conservation status: Listed in
CITES appendix 2.
Synonyms:
- Gymnocalycium marquezii
Cárdenas1958
- Gymnocalycium
pflanzii var. marquezii
-
Gymnocalycium marquezii var. argentinense Backeberg
nom.
inval. (Art.8.2) In: Kakteenlexikon: 169, Abb. Seite 566 (1966).
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Cultivation: Gymnocalycium are very gratifying plants, their culture
is easy and their flowering is abundant if we give them a well drained
relatively rich substrate (if possible not limestone)
Water regularly in summer (but do not overwater ) keep rather
dry in winter, need frequent repottings
and a very luminous exposure but avoid direct exposure to the sun rays.
This species is particularly easy and accommodating, seldom suffer of
cryptogamic diseases. Feed with a high potassium
fertilizer in summer.
Hardy as low as -5° C (or less)
if kept dry.
Propagation: Usually by Seeds.
Photo of conspecific taxa, varieties, forms and cultivars of
Gymnoclycium pflanzii:
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Cultivation
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