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Cremastosperma

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Cremastosperma
Flowering branch of Cremastosperma yamayakatense, from Amazonas, Peru
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Magnoliids
Order:
Magnoliales
Family:
Annonaceae
Genus:
Cremastosperma

R.E.Fr.

Cremastosperma is a genus of flowering plants in the family Annonaceae, subfamily Malmeoideae, tribe Malmeae.[1] In 2005 there were 29 recognised species distributed in Central and South America.[2]

Cremastosperma was described by Robert Elias Fries in 1930,[3] based on Aberemoa pedunculata Diels, originally described by Ludwig Diels (1906),[4] which thus became the type species Cremastosperma pedunculatum (Diels) R.E.Fr..

Species of Cremastosperma are found in lowland to pre-montane tropical forest in the Neotropics. The greatest species diversity is distributed in the narrow tropical zone to the west of the Andean mountain chain on the Pacific Ocean side of north-western South America, north into Central America;[5] and on the eastern side of the Andes extending from Colombia through eastern Ecuador and Peru as far south as Bolivia. Two species are found in coastal Venezuela (Cremastosperma macrocarpum Maas and Cremastosperma venezuelanum Pirie),[6] and one in French Guiana (Cremastosperma brevipes (DC.) R.E.Fr.).

Description

Cremastosperma species are small understory trees with typical Annonaceae floral morphology (sepals and petals in whorls of three; indefinite numbers of spirally arranged stamens and carpels) bearing a resemblance to various other Neotropical genera with apocarpous, single-seeded, stipitate fruits (such as Guatteria). The most useful character by which they can be distinguished from these and other similar Neotropical Annonaceae is displayed by the midrib of the leaves, which is raised on the upper side with an unusual, mostly conspicuous, longitudinal groove.

Recognised species:

References

  1. ^ Chatrou, L. W.; M. D. Pirie; R. H. J. Erkens; T. L. P. Couvreur; K. M. Neubig; J. R. Abbott; J. B. Mols; P. J. M. Maas; R. M. K. Saunders; M. W. Chase (2012). "A new subfamilial and tribal classification of the pantropical flowering plant family Annonaceae informed by molecular phylogenetics". Botanical Journal of the Linnean Society. 169: S. 4–50. doi:10.1111/j.1095-8339.2012.01235.x.
  2. ^ Pirie, M. D. (2005). Cremastosperma (and other evolutionary digressions): Molecular phylogenetic, biogeographic, and taxonomic studies in Neotropical Annonaceae. Ph.D. thesis (PDF). Utrecht, the Netherlands: Utrecht University. ISBN 90-393-39538. Retrieved 2016-11-26.
  3. ^ Fries, R.E. (1930). "Revision der Arten einiger Anonaceen-Gattungen I.". Acta Horti Bergiani. 10: 1–128.
  4. ^ Diels, L. (1906). "Annonaceae andinae". Bot. Jahrb. Syst. 37: 408–410.
  5. ^ Pirie, M. D. (2005). "New Species of Cremastosperma (Annonaceae) from Colombia, Ecuador, and Panama". Blumea - Biodiversity, Evolution and Biogeography of Plants. 50 (1): 41–60. doi:10.3767/000651905X623274. ISSN 0006-5196.
  6. ^ Chatrou, L. W.; M. D. Pirie (2005). "Three New Rarely Collected or Endangered Species of Annonaceae from Venezuela". Blumea - Biodiversity, Evolution and Biogeography of Plants. 50 (1): 33–40. doi:10.3767/000651905X623265. ISSN 0006-5196.


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