نتایج جستجو برای: pedicels

تعداد نتایج: 183  

2005
LISA M. SCHULTHEIS MICHAEL J. DONOGHUE

Gooseberries are often distinguished from currants as a distinct genus (Grossularia) or subgenus (Ribes subg. Grossularia), but recent molecular phylogenetic analyses of chloroplast and nuclear data disagree as to the monophyly of this group. We report new sequence data from the 18–26S nuclear rDNA ITS and ETS regions and from the chloroplast psbAtrnH intergenic spacer that, in combination with...

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2016
Michael D. Windham James B. Beck Fay-Wei Li Loreen Allphin John G. Carman David A. Sherwood Catherine A. Rushworth Erin Sigel Patrick J. Alexander C. Donovan Bailey Ihsan A. Al-Shehbaz James Smith

The genus Boechera is one of the most difficult species complexes in North America, with about 70 sexual diploids and hundreds of apomictic taxa representing diverse combinations of nearly every known sexual genome. In this study, we set out to clarify the taxonomy of Boechera lignifera, which currently includes a small number of sexual diploid populations in addition to the widespread apomicti...

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2006
Barry E. HammEl

Pleodendron costaricense, a very rare, lowland rainforest tree known from southern Pacific Costa Rica is described and illustrated. Its only congener, P. macranthum, grows about 2000 km to the northeast, in Puerto Rico. The only other member of the family Canellaceae known from Central America is the mostly West Indian, Canella winterana, which reaches the Yucatan Peninsula of Mexico. rEsumEn. ...

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