Ditrysinia

Rafinesque

Neogenyton, 2. 1825.

Endemic
Etymology: Greek ditry, two or three, and syn, together, alluding to number and union of stamens
Treatment appears in FNA Volume 12. Treatment on page 230. Mentioned on page 157, 159.
Revision as of 17:29, 29 July 2020 by imported>Volume Importer
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 TaxonIllustrator 
FNA12 P29 Gymnanthes lucida.jpegMicrostachys corniculata
Gymnanthes lucida
Ditrysinia fruticosa
Barbara Alongi
Barbara Alongi
Barbara Alongi

Shrubs, monoecious; hairs unbranched; latex absent. Leaves semipersistent, alternate, simple; stipules present, persistent; petiole present, glands absent; blade unlobed, margins entire, laminar glands usually abaxial, scattered, sometimes absent; venation pinnate. Inflorescences bisexual (pistillate flowers proximal, staminate distal) or staminate, terminal, racemes; glands subtending each bract 2. Pedicels present. Staminate flowers: sepals 3, imbricate, connate basally; petals 0; nectary absent; stamens 3, distinct; pistillode absent. Pistillate flowers: sepals 3, connate basally; petals 0; nectary absent; pistil 3-carpellate; styles 3, connate basally, unbranched. Fruits capsules, base not persisting. Seeds ovoid-oblong; outer seed-coat dry; caruncle present.

Distribution

se United States

Discussion

Species 1.

Molecular phylogenetic analyses indicate a close relationship of Ditrysinia with Microstachys, but taxon sampling is too sparse to determine if Ditrysinia should contain other species that are now classified in polyphyletic Sebastiania (K. Wurdack et al. 2005).

Selected References

None.

"connate" is not a number. "distinct" is not a number.

... more about "Ditrysinia"
Kenneth J. Wurdack +
Rafinesque +
not persisting +
unlobed +
se United States +
Greek ditry, two or three, and syn, together, alluding to number and union of stamens +
pistillate +  and staminate +
subtending +
leaf-opposed +, terminal +  and axillary +
semipersistent +
palmate +  and pinnate +
crenate +, repand +  and subentire +
connate;distinct +
Neogenyton, +
ovoid-oblong +
multifid +  and 2-fid +
Ditrysinia +
Euphorbiaceae +
evergreen +, deciduous +, perennial +, biennial +  and annual +