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  Coryphantha longicornis (“grandis”form)
(Syn: Coryphantha grandis)
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Coryphantha longicornis (“grandis”form)
It is a large growing and solitary or group forming cactus with woolly stem tips.
Most of the plants after a juvenile phase with only radial spines develop the longer central spines, giving it its characteristic sea urchin appearance.
 

Note: This is a variable species especially regarding the length of the lower central spine. The plants with shorter central spines are sometime referred as C. grandis, while those  with longer centrals are referred as C. longicornis. (But this classification is arbitrary and intermediate form are commonly found either in habitat and in cultivation)

 

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Family: Cactaceae (Cactus Family)


Scientific name:  Coryphantha longicornis Bodeker
In: Monatsschr. Deutsch. Kakt. Ges. 3: 249 (1931)

Subgenus: Coryphantha.
Section II. A: Coryphantha.
Series II. A.c: Salinensis.
By: Dicht&Lüthy Class.

Origin
Durango - Mexico (North America)

Conservation status: Listed in CITES appendix 2.

Common Mexican Names include: Biznaga de Piña

Etymology: The species name "longicornis" derives from the Latin 'longus'=  long; and Latin 'cornus'= horn; for the long curved spines

Synonyms:  
  • Coryphantha grandis L.Bremer,
    In: Cact. Succ. Jour. 50 (3): 134 1978
 

Description:
C. longicornis is a large growing and solitary or group forming cactus with woolly stem tips.
Stem: Fat squat globose to short cylindrical glossy green or dull green, up to more than 9-20(-30) cm high and 10-15 cm broad.
Tubercles:
Spirally arranged, conical/ovate, more or less erect, very firm, 14–17 mm wide up to 2 cm long with a narrow, bare groove above; on new growth the groove may show some felt.
Areoles: Woolly when young.
Axil:
Bare or slightly woolly with one gland.
Central spines: 3, rigid, stiff, white to brown, often with black tips, about 1.2-2,5 cm long. The lower one is curved and descending, while the upper and lateral ones are shorter.
Radial spines: About 12, translucent whitish, acicular, acicular, equal straight or curved, short, gray at tips , 5-15 mm long.
Root: Taproot
Flowers: Diurnal pure yellow,
funnel shaped, 3 to 6,5 cm diameter.
Fruit: Yellow green 15-20 mm long
, juicy with attached flower remnants.
 

Cultivation: In culture C. longicornis is without problems, and regularly shows its large yellow flowers. It does best in slight shade, but does well in full sun too. It is sensitive to overwatering (rot prone), and needs a very porous soil with good drainage.  It flowers quite early, but needs about 8-12 years to reach the typical, definite outlook.  It tolerates fairly low temperatures as long as it is kept dry (hardy to -5° C or less for short periods of time).

Propagation: Propagation is by seed.

Home | E-mail | Plant files | Mail Sale Catalogue | Links | Information | Search

All the information and photos in cactus art file are now available also in the new the Enciclopedia of Cacti. We hope you find this new site informative and useful.