Floral Morphology of Some Taxa of Crassulaceae

Karakish, Eman; El-Magly, Usama I.; Hamed, Karima A.; Salim, Mohamed A.

doi:10.5455/egyjebb.20160813102103

Cited by 2 publications

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“…Thiede & Eggli (2007), emphasized the importance of margo aperture in the family Crassulaceae. Based on morphological features described by Baldwin (1938), Uhl (1948), andKarakish et al (2016) as well as molecular traits by Mort et al (2010) and Salim et al (2019), a tight link between the Adromischus and Kalanchoe genera has been revealed.…”

Section: Discussionmentioning

confidence: 94%

“…The separation of Crassula in a distinct group is in accordance with most infrafamilial classification systems of the famiy, viz., Berger (1930), Thiede & Eggli (2007) and Thorne & Reveal (2007) among others, since they placed Crassula species in a separate subfamily, Crassuloideae. Moreover, based on morphological and molecular analysis, Karakish et. al.…”

Section: Discussionmentioning

confidence: 99%

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Pollen Morphology on Some Crassulaceae DC.

Shehata,

Taia,

Shiha

et al. 2023

Egypt. J. Bot.

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C RASSULACEAE (orpine or stonecrop family) is a morphologically diverse and systematically complex Angiosperm family with a cosmopolitan distribution. A detailed description of the range of pollen morphological variation within the family has been presented, to resolve the taxonomic confusion between members of this family. palynological investigation of 19 species representing nine genera of Crassulaceae were studied using both light (LM) and scanning electron microscopy (SEM). The aim of the present study was to find out the taxonomic significance of palyno-morphological characteristics in family Crassulaceae. A comparative pollen analysis was accomplished based on pollen size, shape, polar and equatorial views, polar and equatorial diameter ratio (P/E ratio), aperture characters and exine features. Generally, the pollen grains were found to be monad, isopolar, radially symmetric, prolatespheroidal, subprolate or prolate in equatorial view, triangular, tetragonal, or pentagonal in polar view. There are three different types of apertures encountered in the examined species. These types ranged from tricolporate, tetra-and penta-colporate pollen grains. Clear variation of tectum sculpture pattern was also observed, mostly rugulate/ foveolate and rarely striate. According to tectum sculpturing pattern, three major pollen types were recognized: Crassula type, Echeveria type and Kalanchoe type. Based on the overall characteristics of pollen grains, some combinations of pollen morphological characters can reliably delimitate genera, while others are unique to some species. Additionally, based on qualitative pollen morphological characters, an identification key for main pollen types was provided.

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