Crocoideae

Crocoideae
Crocus aleppicus
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Iridaceae
Subfamily: Crocoideae
Burnett
Synonyms
  • Ixioideae

Crocoideae is one of the major subfamilies in the family Iridaceae.[1]

It contains plants which are widely distributed in the Old World, mainly in Africa, but there are species like some members of the genera Romulea and Gladiolus which are native to Europe and Asia. Some examples are Romulea bulbocodium, Romulea columnae and Gladiolus italicus.[2]

Like the rest of Iridaceae, the members of the subfamily have the typical sword-shaped leaves. The rootstock is usually a corm. The blooms which sometimes have scent are collected in inflorescence and contain six tepals. The nectar is produced mostly in the base of the bloom from the glands of the ovary, which is where the flower forms a tube-like end. In some species there is no such end and the plant only provides pollen to pollinating insects.[citation needed]

The ovary is 3-locular and many-seeded, the appearance of the testa varying widely between the different genera: sometimes fine and delicate, as in the case of Gladiolus and at others black and hard, as in the case of Babiana. The shape of the seed is often pellet-like and may also be globular, discoid or semi-discoid.[citation needed]

Many genera of this group furnish species numbered among the most familiar ornamental plants to be grown in the open garden or in containers, some good examples being Freesia, Ixia, Crocosmia and Gladiolus.[3]

Taxonomy

Tribe Tritoniopsideae
Tribe Watsonieae
Tribe Gladioleae
Tribe Freesieae
Tribe Ixieae

References

  1. ^ Goldblatt, Peter (1990). "Phylogeny and Classification of Iridaceae". Annals of the Missouri Botanical Garden. 77 (4): 607–627. doi:10.2307/2399667. JSTOR 2399667.
  2. ^ Goldblatt, Peter; Davies, Jonathan; Manning, John; van der Bank, Michelle; Savolainen, Vincent (2006). "Phylogeny of Iridaceae Subfamily Crocoideae Based on a Combined Multigene Plastid DNA Analysis". Aliso. 22 (1): 399–411. doi:10.5642/aliso.20062201.32.
  3. ^ Goldblatt, P.; Manning, J. C. (2011-12-13). "Systematics of the southern African genus Ixia (Iridaceae). 3. Sections Hyalis and Morphixia". Bothalia. 41 (1): 83–134. doi:10.4102/abc.v41i1.35. ISSN 2311-9284. S2CID 84534897.


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