Abstract
Barbeya, a monotypic genus of dioecious, arborescent dicotyledonous plants from northeast Africa and adjacent Arabia, is usually regarded as having affinities within the Urticales. It is placed either in the Ulmaceae or segregated as a closely related, monotypic family. Leaves are opposite, exstipulate, and vascularized by a single, crescent-shaped trace from a unilacunar node. Wood anatomy indicates specialization at about the same level as other Urticales. Sieve tube elements of the secondary phloem exhibit highly oblique, compound sieve plates which indicate a low level of evolutionary advancement. The vascularity of the flower is described and compared with other Urticales. Pollen is tricolporate. The relationships of the genus to Moraceae, Ulmaceae, Urticaceae, and Eucommiaceae are discussed. The totality of anatomical and morphological evidence supports the retention of the family Barbeyaceae.
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Claims 6
Claim · model-written summary
Barbeya leaves are opposite and lack stipules.
Verbatim
e0“Leaves are opposite, exstipulate, and vascularized by a single, crescent-shaped trace from a unilacunar node”
t0“Barbeya”
Claim · model-written summary
Barbeya leaves have one crescent-shaped vascular trace from a unilacunar node.
Verbatim
e0“Leaves are opposite, exstipulate, and vascularized by a single, crescent-shaped trace from a unilacunar node”
t0“Barbeya”
Claim · model-written summary
Barbeya wood anatomy indicates specialization similar to other Urticales.
Verbatim
e0“Wood anatomy indicates specialization at about the same level as other Urticales”
t0“Barbeya”
Claim · model-written summary
Secondary phloem sieve elements have oblique compound sieve plates, interpreted as a low evolutionary level.
Verbatim
e0“Sieve tube elements of the secondary phloem exhibit highly oblique, compound sieve plates which indicate a low level of evolutionary advancement”
t0“Barbeya”
Claim · model-written summary
Barbeya pollen is tricolporate.
Verbatim
e0“Pollen is tricolporate”
t0“Barbeya”
Claim · model-written summary
The combined anatomical and morphological evidence supports retaining Barbeyaceae.
- Outcome
- retention of the family Barbeyaceaee0
Verbatim
e0“The totality of anatomical and morphological evidence supports the retention of the family Barbeyaceae”
t0“Barbeya”