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E. adustus SB72 Cosihuiriachi, Chih. Mexico
Very nice, frilly, purple-pink flowers, somes plant with black centrals.

Central spines: Adult plants, either without central spines, or with 1 central spine can be found.  But with the exception of the absence or existence of centrals, all the other characteristics are absolutely identical, namely size and form of ribs, number, size and arrangement of radial spines, flowers, fruits and seeds.  Furthermore this species is one of those Echinocereus which pass a purely radial-spined long youth stage, in which they are already floriferous. Most of the  plants after several years develop central spines, giving the plant its sea urchin appearance.
 

Photo of conspecific taxa, varieties, forms and cultivars of Echinpsis pectinatus: (This taxon has lots of synonyms (like most Echinocereusi ), with several controversial varieties and subspecies):

• E. pectinatus
• E. pectinatus forma cristata
• E. adustus (pectinatus)

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Scientific name:  Echinocereus adustus Engelm.
in Wisliz., Mem. Tour. No. Mex. 104. 1848.

TL: Chihuahua: Cusihuiriachic, 1900m NN, WISLIZENUS 1846
Holotype: Co- sihuiriachi, Mexico, 1846, A. Wislizenus s.n. (2 sheets).
Neotype: México: Chihuahua: Cusihuiriachic, J.N. ROSE 11664, 02 April - 03 April 1908 [US 454379]

Origin:  Mexico, Chihuahua: Cusihuiriachic, Sahuirachic and north of city of Chihuahua

Habitat:  Desert grassland, on loamy soils, on stony hills, altitude 1800-2400m

Conservation status: Listed in CITES appendix 2.

 A young specimen


A mature specimen

Synonyms:

• Cereus adustus (ENGELMANN) ENGELMANN. In: A. GRAY. - Pl.Fendl.: 50 (1849)
• Echinocereus radians ENGELMANN.
  In: WISLIZENUS. - Mem.Tour North.Mex.: 104 (1848)
• Echinocereus. rufispinus ENGELMANN.
  In: WISLIZENUS. - Mem.Tour North.Mex.: 104 (1848)
• Cereus rufispinus (ENGELMANN) ENGELMANN. In: A. GRAY. - Pl.Fendl.: 50 (1849)
• Echinocereus pectinatus var. adustus SEITZ. In: Cat.cactearum cultarum: 11 (1870)
• Echinocereus pectinatus var. rufispinus SEITZ. In Cat.cactearum cultarum: 11 (1870)
• Echinocereus pectinatus var. adustus DAUL.  In: Handbuch Kakteenkunde: 78 (1890)
• Echinocereus pectinatus f. adustus VOSS. In: Villmorin's Blumengärtnerei ed. 3: 378 (1894)
• Echinocereus pectinatus f. rufispinus VOSS. In:Villmorin's Blumengärtnerei ed. 3: 378 (1894)
• Cereus adustus var. radians (ENGELMANN) J. COULTER. In: Contr.U.S.Nat.Herb. 3: 387 (1896)
• Echinocereus pectinatus var. adustus (ENGELMANN) SCHUMANN.
  In: Gesamtb.Kakteen: 271 (1898)
• Echinocereus pectinatus var. rufispinus (ENGELMANN) SCHUMANN.
  In: Gesamtb.Kakteen: 271 (1898)
• Echinocereus  caespitosus var. adustus (ENGELMANN) BORG.
  In: Cacti ed. 1: 174, (1937) nom.inval.
• Echinocereus caespitosus var. rufispinus SCHUMANN ex. BORG.
  In: Cacti ed. 1: 174 (1937) nom.inval.
• Echinocereus caespitosus var. adustus (ENGELMANN) BORG.
  In: Cacti ed. 3: 221 (1959) nom.inval.

Cultivation: In culture E. adustus is without problems, easy to grow, very attractive and regularly shows its beautiful flowers, if provided with an adequate winter rest period. It is sensitive to over-watering (rot prone), and needs good drainage.   Keep drier and cool in winter.  Needs full sun.  In the summer they need an airy location in bright sun; well watered when it's hot. To achieve the best spine density give these plants lots of sun. In the winter light, cool, and absolutely dry conditions. Very cold resistant  above  -12° C or less for short periods of time. In mild climate they grow well when planted freely outside in well-drained soil.
Propagation: Seeds (usually), it also can be grown from cuttings, as it can branch from the base.
 

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.