The position of the Genus Notocactus within the Plant Kingdom
The genus Notocactus can be classified as follows: (Information taken from various sources)
- Kingdom: Plantae
- Division: Magnoliophyta (was Spermatophyta)
- A seed bearing plant.
- Class: Magnoliopsida (Dicotyledonous plants)
- Seed bearing plants that have two cotyledons.
- Order: Caryophyllales
- Perfect flowers, leaves opposite or
whorled, ovary generally
superior, fruit a capsule,
petals sometimes absent.
- Family: Cactaceae A.L de Jussieu.
- For a full description of the family Cactaceae see:
The Families of Flowering Plants - Cactaceae
- Sub-Family: Cactoideae K. Schumann.
- Flowers sessile, without proliferous
inferior. Seeds with thin, hard black
to light and soft testa. Body shape extremely
varied. Leaf blades nearly always completely reduced.
- Tribe: VII. Notocacteae F. Buxbaum.
- Flowers regular.
receptacle tube scaly, with increasing
coverage of areoles towards the top, the
upper part of the receptacle tube with areoles with bristles or even spines.
Occasionally areoles absent, very rarely scales are absent too, and then the
receptacle tube has a leafy crown (Melocactus). Sometimes the base of the
inner perianth segments grows into a
true perigonium. Stems globose or
flattened to dwarf, rarely short columnar, branching from the base or
solitary, ribbed or with ribs divided into tubercles. Flowers solitary or in
clusters from normal areoles or a cephalium.
- Genus: Notocactus K. Schumann (Fric).
- Stems globose, usually elongate in age, some species columnar up to over
1 m tall, solitary or more rarely sprouting from the base, some species producing
stolons. Ribs few, fairly high and sharp, or numerous, bluntly-rounded and low,
frequently spiralling, often cross-furrowed or tuberculate. Young areoles very
woolly, later becoming glabrous, usually
with needle-shaped or bristly spines. Flowers often numerous, near the
apex, funnel-shaped or widened to bell shaped,
yellow, rarely red. Stigma-lobes usually red.
Pericarpel and receptacle-tube densely covered with narrow scales, abundant wool
and bristly spines in the axils. Fruit small,
floral remains conspicuous, often much elongated before ripening, and with seeds
in the upper part only, dry, splitting open length wise, or breaking off by a
basal opening, or berry-like, soft and deliquescent. Seeds straight or slightly
oblique bell-shaped to semi-globose, hilum
basal, strophiole large, incorporating
part of seed coat; seed coat proper black or dark brown, warty.
Split into 6 subgenera:
| Classification (Buxbaum)
| Classification (IOS Consensus)
| Exchange ]
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