Difference between revisions of "Paxistima"
Sylva Tell., 42. 1838.
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|family=Celastraceae | |family=Celastraceae | ||
|distribution=North America;n Mexico. | |distribution=North America;n Mexico. | ||
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|publication title=Sylva Tell., | |publication title=Sylva Tell., | ||
|publication year=1838 | |publication year=1838 | ||
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|genus=Paxistima | |genus=Paxistima | ||
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Revision as of 20:01, 16 December 2019
Shrubs. Branchlets 4-angled, with corky ridges. Leaves persistent, opposite; stipules present; petiole present or absent; blade margins finely toothed; venation pinnate. Inflorescences axillary, cymes or flowers solitary. Flowers bisexual, radially symmetric; perianth and androecium perigynous; hypanthium free from ovary; sepals 4, distinct; petals 4, reddish brown to yellowish green; nectary intrastaminal, lining hypanthium, fleshy; stamens 4, adnate to nectary margin; staminodes 0; pistil 2-carpellate; ovary superior, immersed in and adnate to nectary, 2-locular, placentation axile; style 1; stigmas 2; ovules 2 per locule. Fruits capsules, 2-locular, ellipsoid or obovoid, apex not beaked. Seeds 1 per locule, ellipsoid or obovoid, not winged; aril yellow or white, surrounding base and 1 side of seed, lacerate or fringed. x = 16.
Distribution
North America, n Mexico.
Discussion
Species 2 (2 in the flora).
Pachystima and Pachistima are orthographic variants used frequently in the flora area.
Selected References
None.
Lower Taxa
Key
| 1 | Shrubs 1–4 dm; leaves 5–20 × 2–4 mm, usually linear to narrowly elliptic, rarely oblanceolate; capsules 3–4 mm. | Paxistima canbyi |
| 1 | Shrubs 5–10 dm; leaves 8–34 × 3–12 mm, ovate, elliptic, or oblanceolate; capsules 4–7 mm. | Paxistima myrsinites |