Difference between revisions of "Torreya"
Ann. Nat. Hist. 1: 130. 1838.
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|distribution=North America;Asia in China and Japan. | |distribution=North America;Asia in China and Japan. | ||
| − | |discussion=<p>Two Asian species are planted as ornamentals in North America: Torreya nucifera Siebold & Zuccarini (kaya-nut, Japanese torreya), which yields edible seeds and cooking oil, and T. grandis Fortune (Chinese torreya).</p><!-- | + | |discussion=<p>Two Asian species are planted as ornamentals in North America: <i>Torreya</i> nucifera Siebold & Zuccarini (kaya-nut, Japanese torreya), which yields edible seeds and cooking oil, and <i>T. grandis</i> Fortune (Chinese torreya).</p><!-- |
--><p>Species 4(–6) (2 in the flora).</p> | --><p>Species 4(–6) (2 in the flora).</p> | ||
|tables= | |tables= | ||
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|publication year=1838 | |publication year=1838 | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V2/V2_68.xml |
|genus=Torreya | |genus=Torreya | ||
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-->[[Category:Treatment]][[Category:Taxaceae]] | -->[[Category:Treatment]][[Category:Taxaceae]] | ||
Revision as of 15:50, 18 September 2019
Trees dioecious. Bark brown to grayish brown, tinged with orange, fissured. Branches spreading to drooping; twigs nearly opposite. Leaves mostly appearing 2-ranked, rigid; stomates abaxial, in 2 narrow, glaucous, whitish or brownish bands; apex sharp-pointed, spine-tipped, sharp to touch; resin canal central. Pollen cones ovoid or oblong, with 6–8 whorls of 4 sporophylls, each bearing 4 sporangia. Ovules 2, only 1 of each pair maturing. Seed maturing in 2 years; aril green or green with purple streaks, resinous, leathery, thin, completely enclosing woody seed coat, splitting into 2 parts at maturity; albumen ruminate. x = 11.
Distribution
North America, Asia in China and Japan.
Discussion
Two Asian species are planted as ornamentals in North America: Torreya nucifera Siebold & Zuccarini (kaya-nut, Japanese torreya), which yields edible seeds and cooking oil, and T. grandis Fortune (Chinese torreya).
Species 4(–6) (2 in the flora).
Selected References
Lower Taxa
Key
| 1 | Two-year-old branches reddish brown; leaves 3-8 cm, flattened on adaxial side, with 2 deeply impressed, glaucous bands of stomates abaxially, emitting pungent odor when crushed; aril light green streaked with purple; California. | Torreya californica |
| 1 | Two-year-old branches yellowish green, yellowish brown, or gray; leaves 1.5-3.8 cm, rounded on adaxial side, with 2 scarcely impressed, grayish bands of stomates abaxially, emitting fetid odor when crushed; aril dark green streaked with purple; Florida, Georgia. | Torreya taxifolia |