Pachysandra terminalis

Siebold & Zuccarini

Abh. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. 4(2): 142. 1845.

Common names: Japanese mountain spurge
Synonyms: Pachysandra terminalis var. variegata Norton
Treatment appears in FNA Volume 10.
Revision as of 20:05, 7 June 2022 by imported>Volume Importer
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Herbs 10–30 cm, glabrous or glabrate. Leaves crowded distally and in clusters at middle and often at proximal part of stem; petiole 1–3 cm; blade slightly darker green adaxially, without mottling along veins, elliptic to widely elliptic or ovate, broadly ovate, or obovate, 5–8 × 2–4 cm, base cuneate to broadly cune­ate, margins coarsely dentate distal to middle, apex (terminal tooth) acute or obtuse, abaxial surface puberulent along veins, adaxial surface glabrous, shiny (not evident when dried). Inflorescence 1, terminal. Staminate flowers 15–20, sessile, each subtended by 1 bract and 2 sepal-like bracteoles; tepals 2, ovate, 2.5–4 mm, margins ciliate, apex rounded. Pistillate flowers 2–7, pedicellate; tepals 2.5–4 mm, margins ciliate, apex rounded; ovary 2 (or 3) -carpellate, apical lobes 2 (or 3), locules 1 (or 2) per carpel; styles 2; ovules 1 or 2 per locule. Fruits berries, to 15 mm diam., apex 2-lobed, glabrous. Seeds 1–3, brown or black, 4–6 × 2–3 mm; ecarunculate. 2n = 48.


Phenology: Flowering Mar–Apr; fruiting Jul–Aug.
Habitat: Roadsides, railroad embankments, moist woods, along streams, near old homesites.
Elevation: 0–1000 m.

Distribution

Introduced; Ont., Conn., Del., Ill., Ind., Md., Mass., N.H., Ohio, Pa., R.I., Va., Wis., e Asia

Discussion

Pachysandra terminalis, a native of China and Japan, is widely cultivated as an ornamental groundcover, usu­ally in shaded situations, in temperate North America. The plants are more likely to spread vegetatively by rhizome pieces rather than by seeds. Many natural-appearing occurrences may be remnants of cultivation. The two sepal-like bracteoles of the staminate flowers are sometimes interpreted as tepals (R. B. Channelland C. E. Wood Jr. 1987).

Selected References

None.

Lower Taxa

None.
... more about "Pachysandra terminalis"
conspicuous +
2-lobed +, rounded +, obtuse +  and acute +
David E. Boufford +
Siebold & Zuccarini +
cuneate +
circumscissile +  and basal +
hairy +  and glabrous +
ovoid +  and subglobose +
mottling +  and darker green +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
obovate +, ovate +  and elliptic +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
circumscissile +  and basal +
hairy +  and glabrous +
ovoid +  and subglobose +
Japanese mountain spurge +
Ont. +, Conn. +, Del. +, Ill. +, Ind. +, Md. +, Mass. +, N.H. +, Ohio +, Pa. +, R.I. +, Va. +, Wis. +  and e Asia +
0–1000 m. +
pedicellate +, pistillate +, sessile +  and staminate +
2 +  and 7 +
circumscissile +  and basal +
hairy +  and glabrous +
ovoid +  and subglobose +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Roadsides, railroad embankments, moist woods, along streams, near old homesites. +
perennial +
glabrate +  and glabrous +
axillary +  and terminal +
persistent +
dentate +  and entire +
distal +  and middle +
2-carpellate +
3-lobed +
crassinucellate +  and bitegmic +
anatropous +  and pendulous +
2 +  and 1 +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Mar–Apr +  and fruiting Jul–Aug. +
3-carpellate +  and 2-carpellate +
distinct +  and connate +
Abh. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. +
ecarunculate +
black +  and brown +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1 +  and 3 +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not +  and clonal +
distinct +  and free +
ascending +  and erect +
divergent +  and divaricate +
subulate +
shiny +  and dull +
Pachysandra terminalis var. variegata +
Pachysandra terminalis +
Pachysandra +
species +
distinct +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +