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Cereus jamacaru forma
cristata
It is a very decorative and strong crest.
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| Description: The
typical Cereus jamacaru is a large, multibranched
Brazilian tree cactus with wavy approximately 6-sided columns and sparse
spines up to 10 m tall, that looks remiscent of a
Saguaro cactus but thinner. The bluish-green colouring is also
distinctly different. The crested form can also get very big making a
spectacular specimen.
Cultivation:
It is a fairly easy plant to grow both grafted or in its own roots.
During the summer it is best to keep the plants outside where the
temperature can rise to over 30 C with no harm to the plant. Furnish
good drainage and use a an open and free draining mineral compost that
allows therefore roots to breath. They like only a short winter's rest
and should be kept almost completely dry during the winter months, If
the soil is allowed to be dry for too long root loss could follow but
equally the same result would occur if the plants are both wet and cold.
From March onwards the plant will begin to grow and watering should be
increased gradually until late May when the plant should be in full
growth.
Water regularly during the summer so long as the plant pot is allowed to
drain and not sit in a tray of water. During hot weather you may need to
water the plants more frequently so long as the plant is actively
growing. From late September watering should be reduced to force the
plant to go in to a state of semi dormancy, by October you should be
back in to the winter watering regime.
Need full sun avoiding only the harshest summer sun, if kept too dark
they may become overly lush and greener and could be prone to rotting
due to over watering.
Feeding may not be necessary at all if the compost is fresh then, feed
in summer only if the plant hasn't been repotted recently. Do not feed
the plants from September onwards as this can cause lush growth which
can be fatal during the darker cold months. Grown
specimens resist to -4°C for a short time, but it is best to keep above
5° C to avoid ugly spots on the plant epidermis.
Propagation: By
vegetative propagation grafting or stem cuttings from adult plants.
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Family:
Cactaceae (Cactus
Family)
Scientific name: Cereus jamacaru De
candolle
In: Prodr. 3: 467. 1828
Conservation status: Listed in
CITES appendix 2
Synonyms:
- Cereus glaucus Salm-dick
in: Hort. Dyck.355, 1834
- Cereus laetevirens Salm-dick
in: Hort. Dyck.356, 1834
- Cereus lividus Pfeiffer
in: Allg. Gartenz. 3:380. 1835
- Cactus jamacaru Kosteletzky
In: Allg. Med. Pharm. Fl. 4:1393. 1835
- Cereus horribarbis Otto in Sam-Dick
In: Cact. Hort. Dick. 1849. 205. 1850
- Cereus cauchinii Rebut in Schuman.
In: Gesamtb. Kakteen 113. 1897
- Piptanthocereus jamacaru Riccobono.
Boll. R. Ort. Bot. Palermo 8:230. 1909
- Piptanthocereus cabralensis
- Cereus calcirupicola
- Piptanthocereus calcirupicola
- Piptanthocereus cipoensis
- Piptanthocereus goiasensis
- Cereus goiasensis
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