Английская Википедия:Arisaema pusillum
Шаблон:Short description Шаблон:Speciesbox
Arisaema pusillum is a species of flowering plant in the arum family Araceae.Шаблон:R It is a member of the Arisaema triphyllum complex, a group of closely related taxa in eastern North America. The specific name pusillum, which means "very small, slender",Шаблон:R describes the overall size of the plant relative to that of the more common Arisaema triphyllum.Шаблон:R It is commonly known as the small Jack-in-the-pulpit (or small Jack). It is sometimes referred to as the swamp Jack, not to be confused with Arisaema stewardsonii, which is also known by that name.
Description
Arisaema pusillum is a herbaceous, perennial, flowering plant growing from a corm. Like other members of the Arisaema triphyllum complex, it has three leaflets per leaf. Throughout most of its range, it is a relatively small plant, seldom over Шаблон:Cvt tall.Шаблон:R In Georgia and Florida, it can reach up to Шаблон:Cvt tall, but some botanists refer to the latter as Arisaema acuminatum.Шаблон:Sfnp
Similar species
The overall habit and character of Arisaema pusillum is very similar to that of Arisaema stewardsonii but the latter is easily distinguished by its strongly fluted spathe tube. Arisaema pusillum is less like Arisaema triphyllum sensu stricto, but since a diagnostic character is lacking, the two species are more difficult to distinguish in practice. The following table of characters compares the three species side-by-side:Шаблон:SfnpШаблон:SfnpШаблон:Sfnp
| Arisaema pusillum | Arisaema stewardsonii | Arisaema triphyllum | |
|---|---|---|---|
| Leaflets | Light green, glossy underneath | Light green, glossy underneath | Glaucous underneath |
| Spathe tube | Smooth to slightly fluted | Strongly fluted | Smooth to slightly fluted |
| Spathe hood | Wholly purple or wholly green, rarely purple with fine green stripes | Green with purple stripes | Green with purple stripes or wholly green |
| Spathe flange | Revolute, 1–3 mm wide | Revolute, 1–3 mm wide | Flat or slightly revolute, 4.5–7 mm wide |
| Spadix appendix | Cylindric (shaped like a cylinder), 2–5 mm in diameter | Cylindric, 2–5 mm in diameter | Clavate (shaped like a club), 4–10 mm in diameter |
| Habitat | Hydric (wet) deciduous woodlands, swamps, wetlands | Hydric deciduous woodlands, bogs, swamps, wetlands | Mesic (moist) deciduous woodlands |
| Range | Primarily southeastern U.S. | Primarily northeastern U.S. and southeastern Canada | Wide ranging across eastern North America |
Taxonomy
Arisaema pusillum was first described as Arisaema triphyllum var. pusillum by Charles Horton Peck in his Report of the State Botanist of 1897.Шаблон:R Peck's description was based on a specimen collected by Fred Thorne in Millbrook, New York, also in 1897. The variety was given species rank by the American botanist George Valentine Nash in 1901.Шаблон:R Шаблон:As of, the name Arisaema pusillum Шаблон:Small is widely recognized.
Arisaema pusillum is a member of the Arisaema triphyllum complex, a group of closely related taxa that also includes Arisaema acuminatum, Arisaema quinatum, Arisaema stewardsonii, and Arisaema triphyllum. Шаблон:As of, some authorities consider Arisaema pusillum to be a synonym for Arisaema triphyllum or A. triphyllum subsp. pusillum,Шаблон:R However, most authorities accept Arisaema pusillum and the other species-level members of the complex.Шаблон:SfnpШаблон:R
Distribution and habitat
Arisaema pusillum is found primarily in the eastern United States, from Louisiana and Mississippi, northward to New York and southern New England. Some sources claim that it occurs as far north as Ontario and Quebec in eastern Canada,Шаблон:R while others claim its range extends to New York and southeastern Connecticut but no further.Шаблон:Sfnp In the southeastern United States, it is common throughout the Appalachian Mountains, from northern Alabama to West Virginia.Шаблон:R
Conservation
The global conservation status of Arisaema pusillum is unknown. Based on the conservation status of Arisaema triphyllum subsp. pusillum,Шаблон:R it may be inferred that Arisaema pusillum is globally secure (G5). It is uncommon (or worse) in New York (S3?), Quebec (S2?), Illinois (S1S2), and West Virginia (S1).
References
Bibliography
External links
- Английская Википедия
- Arisaema
- Flora of the Eastern United States
- Plants described in 1897
- Taxa named by George Valentine Nash
- Flora without expected TNC conservation status
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- Страницы с телепортом
- Википедия
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