Comments
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eFloras tarafından sağlandı
Amaranthus wrightii seems to be closely related to A. retroflexus. In some herbaria the specimens of A. acanthochiton J. D. Sauer (previously known as Acanthochiton wrightii Torrey, see above) were mechanically "transferred" to Amaranthus and erroneously placed in folders as "Amaranthus wrightii." That confusion was caused by the identical species epithets; these two taxa are dramatically different morphologically. Amaranthus wrightii may also occur in adjacent Mexico.
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Description
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İngilizce
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eFloras tarafından sağlandı
Plants glabrous or nearly so. Stems erect or ascending, often whitish or tinged with red, simple to sparingly branched distally, or occasionally basally, 0.2-1 m. Leaves: petiole shorter than to ± equaling blade; blade rhombic-ovate to elliptic-lanceolate, 1.5-6 × 0.5-3 cm, base broadly to narrowly cuneate, margins entire, plane to slightly undulate, apex obtuse to subacute, or shallowly emarginate, with terminal mucro. Inflorescences terminal and axillary in distal part of plant, erect, usually reddish green, branched, leafless at least distally, short and thick. Bracts linear-lanceolate to subulate, to 2 times as long as tepals, apex spinescent. Pistillate flowers: tepals 5, spatulate-linear, not clawed, subequal or unequal, 1.5-2 mm, membranaceous, apex emarginate or retuse to obtuse, outer tepals with apex rarely subacute; style branches shorter than body of fruit; stigmas 3. Staminate flowers few at tips of inflorescences; tepals 5; stamens 4-5. Utricles subglobose to broadly obovoid, 1.3-2 mm, equal or subequal to tepals, smooth or slightly rugose, dehiscence regularly circumscissile. Seeds dark reddish brown to nearly black, lenticular to subglobose-lenticular, 1 mm diam., smooth, shiny.
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Distribution
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Ariz., Colo., N.Mex., Tex.
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Flowering/Fruiting
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Flowering summer-fall.
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Habitat
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Naturally disturbed habitats, streambanks, canyons, semideserts; 500-2000m.
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Comprehensive Description
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North American Flora tarafından sağlandı
Amaranthus wrightii S. Wats. Proc. Am. Acad. 12: 275
1877.
Stems stout, erect, 2-10 dm. high, often simple, sometimes branched at the base or sparsely branched above, the branches strongly ascending, whitish or tinged with red, glabrous ; leaves few, the petioles slender, 5-40 mm. long, the blades 1.2-6 cm. long, 0.4-3 cm. wide, lanceelliptic to rhombic-ovate, acutish to obtuse at the apex, sometimes emarginate, cuneate to acute or abruptly acute at the base, yellowish-green, slightly paler beneath, glabrous; flowers monoecious, in dense, stout, erect, terminal, simple or branched spikes 4-25 cm. long, these often leafy, interrupted below, dense clusters of flowers present also in the axils of the leaves, shorter than the petioles; bracts linear-lanceolate or subulate, longer than the sepals, often twice as long, rigid, greenish, pungent; sepals of the staminate flowers oblong, acute; sepals of the pistillate flowers 1.5-2 mm. long, oblong-linear, evidently narrowed at the base, rounded to truncate and usually emarginate or retuse at the apex, or the outermost one rarely pungent, thin, faintly 1-nerved, the nerve usually not reaching the apex, sometimes ciliate, erect, united at the base, often tinged with red; stamens 3; style-branches 3, short; utricle globose, about equaling the sepals, smooth or nearly so, circumscissile at the middle; seed rotund, 1 mm. in diameter, dark reddish-brown, smooth and shining.
Type locality : Copper mines [Santa Rita], New Mexico. Distribution : Arizona, western New Mexico, and southern Colorado.
- bibliyografik atıf
- Paul Carpenter Standley. 1917. (CHENOPODIALES); AMARANTHACEAE. North American flora. vol 21(2). New York Botanical Garden, New York, NY
Amaranthus wrightii
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İngilizce
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wikipedia EN tarafından sağlandı
Amaranthus wrightii is a species of flowering plant. It goes by the common name of Wright's amaranth. It occurs from western Texas into southern Arizona and as far north as Colorado at elevations between 500–2,000 m (1,600–6,600 ft).[1]
Description
Amaranthus wrightii is a mostly glabrous plant growing 0.2–1 m (7.9 in – 3 ft 3.4 in) tall. The erect or ascending stems are tinged with white or red. The rhombic-ovate to lanceolate leaves are 1.5–6 cm (0.59–2.36 in) long and 0.5–3 cm (0.20–1.18 in) wide, with petioles slightly shorter than the leaves. The base of the leaves are acute, the leaf margins are entire, and the apex of the leaves are obtuse. The terminal and axillary inflorescences are short and thick, and reddish-green. The linear-lanceolate bracts are twice as long as the tepals. The pistillate flowers have five tepals and are 1.5–2 mm (0.059–0.079 in) wide. The staminate flowers also have five tepals and grow at the tips of inflorescences. The utricles are 1.3–2 mm (0.051–0.079 in) wide. The dark reddish to black seeds are 1 mm (0.039 in) wide and lenticular.[2]
The plant flowers from summer into fall.[2]
References
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Amaranthus wrightii: Brief Summary
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wikipedia EN tarafından sağlandı
Amaranthus wrightii is a species of flowering plant. It goes by the common name of Wright's amaranth. It occurs from western Texas into southern Arizona and as far north as Colorado at elevations between 500–2,000 m (1,600–6,600 ft).
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Amaranthus wrightii
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wikipedia LA tarafından sağlandı
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Amaranthus wrightii: Brief Summary
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wikipedia LA tarafından sağlandı
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Amaranthus wrightii
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wikipedia VI tarafından sağlandı
Amaranthus wrightii là loài thực vật có hoa thuộc họ Dền. Loài này được S.Watson mô tả khoa học đầu tiên năm 1877.[1]
Tham khảo
Liên kết ngoài
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Amaranthus wrightii: Brief Summary
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Vietnamca
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wikipedia VI tarafından sağlandı
Amaranthus wrightii là loài thực vật có hoa thuộc họ Dền. Loài này được S.Watson mô tả khoa học đầu tiên năm 1877.
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Vide "Amaranthus wrightii" apud Vicispecies. 
Situs scientifici: Tropicos • GRIN • ITIS • Plant List • NCBI • Biodiversity • Encyclopedia of Life • Plant Name Index • Flora of North America • USDA Plants Database 
Bài viết về phân họ Dền này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. 
