World Pollen and Spore Flora 23. Malvaceae Adams. P.p. Subfamilies: Grewioideae, Tilioideae, Brownlowioideae

Perveen, Anjum; Grafström, Elisabeth; El‐Ghazaly, Gamal

doi:10.1080/00173130410000730

Cited by 26 publications

(13 citation statements)

References 22 publications

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“…Currently, Sparrmannia is a genus of seven species, characterised by pendent flowers with a recurved corolla and irritable stamens (Mabberley 2008). These results are consistent with less conclusive earlier findings based on morphological (Judd & Manchester 1997) and pollen (Perveen et al 2004) data. I accept Entelea as a genus endemic to New Zealand, although the monophyly of related genera needs to be investigated.…”

Section: Lamiaceaesupporting

confidence: 82%

Evidence-based review of the taxonomic status of New Zealand's endemic seed plant genera

Garnock‐Jones

2014

New Zealand Journal of Botany

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The nature, value and relative importance of different lines of evidence for deciding the circumscription and rank of genera are examined and discussed. First, I argue that the circumscriptions of genera (and higher taxa) should always be monophyletic, preferably with strong support from independent evidence. Second, the rank of genus is decided on more subjective grounds, but several criteria are helpful: phylogeny should be recoverable from the classification hierarchy, genera should be distinctive, ranks should not be redundant and familiar names should be retained if other criteria are met. I then apply these criteria to an evaluation of the circumscription and rank of 59 New Zealand endemic genera of seed plants accepted in two recent checklists. Fifteen genera (25.4%) were rejected and 16 (27.1%) are considered equivocal. However, my lower estimate almost certainly underestimates endemism at genus rank because the circumscriptions of several genera not evaluated here, such as Pachycladon, could change in the future to become endemic. One new combination is made: Sonchus novae-zelandiae (Hook.f.) Garn.-Jones, although work in progress by others is likely to lead to several more.

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Section: Lamiaceaesupporting

confidence: 82%

Evidence-based review of the taxonomic status of New Zealand's endemic seed plant genera

Garnock‐Jones

2014

New Zealand Journal of Botany

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“…Palynological evidence shows that the genus Microcos is stenopalynous with subprolate to prolate, small tricolporate grains. However, [26] considered medium and tricolporate grains to be basic pollen type in the genus.…”

Section: Discussionmentioning

confidence: 99%

“…Photomicrographs were taken using Leica CME with Digital Microscope Eyepiece attachment and Photo Explorer 8.0 SE basic software. Terminologies were based on [22] [25] and [26].…”

Section: Pollen Morphologymentioning

confidence: 99%

Foliar Epidermal and Pollen Characters of Some Species in the Genus Microcos Linn. in Nigeria

Shokefun¹,

Orijemie²,

Ayodele³

2014

AJPS

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“…The subprolate pollen shape, exine thickness of 1.5 µm and absence of margo in the colpi and baculate tectum separated D. chrysochlamy (Figure 2a) from D. dewevrei and D. subericarpa which have prolate pollen shapes, colpi with margo and perforated tectum (Figure 2c and e). The usefulness of exine ornamentation patterns in the study of systematic and phylogenetic relationships involving subspecies, varieties and cultivars have been reported (Perveen et al 2004). It must be reiterated, however, that David and Heywood (1963) and Moore et al (1991) had opined that the shape of pollen grain is less useful taxonomically because it can vary considerably within one species and the variation may be caused by the extracting methods and embedding media used.…”

Section: Discussionmentioning

confidence: 99%

“…Many works have shown that the shape of epidermal cells, types and arrangement of stomata as well as the size, type, distribution and number of cells in trichomes are important taxonomic characters which can be used in delimiting species boundary (Shokefun et al 2014b;Stace 1984). Also of taxonomic importance is the pollen features which have been utilised over the years in resolving phylogenetic relationship problems (Judd & Olmstead 2004;Perveen et al 2004). The present study is, therefore, aimed at investigating the leaf Desplatsia is a genus made up of about four to eight species which are mostly trees native to tropical Africa.…”

Section: Introductionmentioning

confidence: 99%

A preliminary leaf epidermal and pollen morphology of some West African species of <i>Desplatsia</i> Bocq

Shokefun

Ayodele

Orijemie

2017

JOMPED

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Desplatsia is a genus made up of about four to eight species which are mostly trees native to tropical Africa. The leaf and pollen characters of three West African species of Desplatsia were investigated using light microscopy. The study was aimed at investigating the leaf epidermis and pollen morphology of the species to further enhance the understanding of the taxonomic relationships in the genus. The epidermal cells were isodiametric, polygonal to irregular with straight, curved to wavy anticlinal cell walls. The species were hypostomatic with anisocytic and staurocytic stomata types. The adaxial and abaxial walls of Desplatsia chrysochlamywere characterised by three-celled head multicellular glandular trichomes with highest number of cells and stomata and striated adaxial surface. The four-armed branched and stellate trichomes with the largest stomata size of 19.5 µm × 15.6 µm distinguished D. dewevrei from D. subericarpa in which the largest cells, lowest number of stomata and size were recorded. The pollen grains were medium in size 26.5 µm–47.5 µm, tricolporate with long colpi. However, the subprolate, baculate exine surface, small ora and lumen width separated D. chrysochlamy from D. dewevrei and D. subericarpa in which prolate, perforated exine surface and colpi margo were recorded. A key is provided for the identification of the species. Therefore, the ora size, lumen width, number of epidermal cell and stomata are additional taxonomic characters that can be used for species delimitation in the genus.

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World Pollen and Spore Flora 23. Malvaceae Adams. P.p. Subfamilies: Grewioideae, Tilioideae, Brownlowioideae

Cited by 26 publications

References 22 publications

Evidence-based review of the taxonomic status of New Zealand's endemic seed plant genera

Evidence-based review of the taxonomic status of New Zealand's endemic seed plant genera

Foliar Epidermal and Pollen Characters of Some Species in the Genus Microcos Linn. in Nigeria

A preliminary leaf epidermal and pollen morphology of some West African species of <i>Desplatsia</i> Bocq

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